Introduction

IBM Watson™ Discovery for IBM Cloud Pak for Data is a cognitive search and content analytics engine that you can add to applications to identify patterns, trends and actionable insights to drive better decision-making. Securely unify structured and unstructured data with pre-enriched content, and use a simplified query language to eliminate the need for manual filtering of results.

This documentation describes Java SDK major version 8. For details about how to migrate your code from the previous version see the migration guide.

This documentation describes Node SDK major version 5. For details about how to migrate your code from the previous version, see the migration guide.

This documentation describes Python SDK major version 4. For details about how to migrate your code from the previous version, see the migration guide.

This documentation describes Ruby SDK major version 1. For details about how to migrate your code from the previous version, see the migration guide.

This documentation describes .NET Standard SDK major version 4. For details about how to migrate your code from the previous version, see the migration guide.

This documentation describes Go SDK major version 1. For details about how to migrate your code from the previous version, see the migration guide.

This documentation describes Swift SDK major version 3. For details about how to migrate your code from the previous version, see the migration guide.

This documentation describes Unity SDK major version 4. For details about how to migrate your code from the previous version, see the migration guide.

Beginning with version 4.0.0, the Node SDK returns a Promise for all methods when a callback is not specified.

The package location moved to ibm-watson. It remains available at watson-developer-cloud but is not updated there. Use ibm-watson to stay up to date.

The IBM Watson Unity SDK has the following requirements.

  • The SDK requires Unity version 2018.2 or later to support TLS 1.2.
    • Set the project settings for both the Scripting Runtime Version and the Api Compatibility Level to .NET 4.x Equivalent.
    • For more information, see TLS 1.0 support.
  • The SDK does not support the WebGL projects. Change your build settings to any platform except WebGL.

For information about how to install and configure the SDK and SDK Core, see https://github.com/watson-developer-cloud/unity-sdk.

The code examples on this tab use the client library that is provided for Java.

Maven

<dependency>
  <groupId>com.ibm.watson</groupId>
  <artifactId>ibm-watson</artifactId>
  <version>8.2.1</version>
</dependency>

Gradle

compile 'com.ibm.watson:ibm-watson:8.2.1'

GitHub

https://github.com/watson-developer-cloud/java-sdk

The code examples on this tab use the client library that is provided for Node.js.

Installation

npm install ibm-watson@^5.4.0

GitHub

https://github.com/watson-developer-cloud/node-sdk

The code examples on this tab use the client library that is provided for Python.

Installation

pip install --upgrade "ibm-watson>=4.3.0"

GitHub

https://github.com/watson-developer-cloud/python-sdk

The code examples on this tab use the client library that is provided for Ruby.

Installation

gem install ibm_watson

GitHub

https://github.com/watson-developer-cloud/ruby-sdk

The code examples on this tab use the client library that is provided for Go.

go get -u github.com/watson-developer-cloud/go-sdk@v1.4.0

GitHub

https://github.com/watson-developer-cloud/go-sdk

The code examples on this tab use the client library that is provided for Swift.

Cocoapods

pod 'IBMWatsonDiscoveryV2', '~> 3.3.0'

Carthage

github "watson-developer-cloud/swift-sdk" ~> 3.3.0

Swift Package Manager

.package(url: "https://github.com/watson-developer-cloud/swift-sdk", from: "3.3.0")

GitHub

https://github.com/watson-developer-cloud/swift-sdk

The code examples on this tab use the client library that is provided for .NET Standard.

Package Manager

Install-Package IBM.Watson.Discovery.v2 -Version 4.3.1

.NET CLI

dotnet add package IBM.Watson.Discovery.v2 -version 4.3.1

PackageReference

<PackageReference Include="IBM.Watson.Discovery.v2" Version="4.3.1" />

GitHub

https://github.com/watson-developer-cloud/dotnet-standard-sdk

The code examples on this tab use the client library that is provided for Unity.

Github

https://github.com/watson-developer-cloud/unity-sdk

https://github.com/IBM/unity-sdk-core

Authentication

To authenticate to the API, you pass a bearer token in an Authorization header. The token is associated with a username.

For testing and development, you can use the bearer token that's displayed in the IBM Cloud Pak for Data web client. To find this token, view the details for the provisioned service instance. The details also include the service endpoint URL. Don't use this token in production because it does not expire.

For production use, create a user in the IBM Cloud Pak for Data web client to use for authentication. Generate a token from that user's credentials with the POST preauth/validateAuth method.

To authenticate to the API, pass either username and password credentials or a bearer token that you generate. Username and password credentials use basic authentication. However, the SDK manages the lifecycle of the token. Tokens are temporary security credentials. If you pass a token, you maintain the token lifecycle.

For production use, create a user in the IBM Cloud Pak for Data web client to use for authentication, and decide which authentication mechanism to use.

  • To have the SDK manage the lifecycle of the token, use the username and password for that new user in your calls.
  • To manage the lifecycle of the token yourself, generate a token from that user's credentials. Call the POST preauth/validateAuth method to generate the token, and then pass the token in an Authorization header in your calls. You can see an example of the method on the Curl tab.

Don't use the bearer token that's displayed in the web client for the instance except during testing and development because that token does not expire.

To find your value for {cpd_cluster_host}, {:port}, and {instance_id}, view the service credentials by viewing the details for the provisioned service instance in the IBM Cloud Pak for Data web client.

Generating a bearer token. The response includes an accessToken property.

Replace {cpd_cluster_host} and {port} with the details for the service instance. Replace {username} and {password} with your IBM Cloud Pak for Data credentials.

curl -k -u "{username}:{password}" "https://{cpd_cluster_host}{:port}/v1/preauth/validateAuth"

Authenticating to the API. Replace {accessToken} with your details.

curl -H "Authorization: Bearer {accessToken}" "{url}/v2/{method}"

SDK managing the token.

Replace {username} and {password} with your IBM Cloud Pak for Data credentials. Replace {version} with the service version date. For {cpd_cluster_host}, {port}, {release}, and {instance_id}, see Service endpoint.

CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator("https://{cpd_cluster_host}{:port}", "{username}", "{password}");
Discovery discovery = new Discovery("{version}", authenticator);
discovery.setServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

SDK managing the token.

Replace {username} and {password} with your IBM Cloud Pak for Data credentials. Replace {version} with the service version date. For {cpd_cluster_host}, {port}, {release}, and {instance_id}, see Service endpoint.

const DiscoveryV2 = require('ibm-watson/discovery/v2');
const { CloudPakForDataAuthenticator } = require('ibm-watson/auth');

const discovery = new DiscoveryV2({
  version: '{version}',
  authenticator: new CloudPakForDataAuthenticator({
    username: '{username}',
    password: '{password}',
    url: 'https://{cpd_cluster_host}{:port}',
  }),
  url: 'https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api',
});

SDK managing the token.

Replace {username} and {password} with your IBM Cloud Pak for Data credentials. Replace {version} with the service version date. For {cpd_cluster_host}, {port}, {release}, and {instance_id}, see Service endpoint.

from ibm_watson import DiscoveryV2
from ibm_cloud_sdk_core.authenticators import CloudPakForDataAuthenticator

authenticator = CloudPakForDataAuthenticator(
    '{username}',
    '{password}',
    'https://{cpd_cluster_host}{:port}'
)

discovery = DiscoveryV2(
    version='{version}',
    authenticator=authenticator
)

discovery.set_service_url('https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api')

SDK managing the token.

Replace {username} and {password} with your IBM Cloud Pak for Data credentials. Replace {version} with the service version date. For {cpd_cluster_host}, {port}, {release}, and {instance_id}, see Service endpoint.

require "ibm_watson/authenticators"
require "ibm_watson/discovery_v2"
include IBMWatson

authenticator = Authenticators::CloudPakForDataAuthenticator.new(
  username: "{username}",
  password: "{password}",
  url: "https://{cpd_cluster_host}{:port}"
)
discovery = DiscoveryV2.new(
  version: "{version}",
  authenticator: authenticator
)
discovery.service_url = "https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api"

SDK managing the token.

Replace {username} and {password} with your IBM Cloud Pak for Data credentials. Replace {version} with the service version date. For {cpd_cluster_host}, {port}, {release}, and {instance_id}, see Service endpoint.

import (
  "github.com/IBM/go-sdk-core/core"
  "github.com/watson-developer-cloud/go-sdk/discoveryv2"
)

func main() {
  authenticator := &core.CloudPakForDataAuthenticator{
    URL: "https://{cpd_cluster_host}{:port}",
    Username: "{username}",
    Password: "{password}",
  }

  options := &discoveryv2.DiscoveryV2Options{
    Version: "{version}",
    Authenticator: authenticator,
  }

  discovery, discoveryErr := discoveryv2.NewDiscoveryV2(options)

  if discoveryErr != nil {
    panic(discoveryErr)
  }

  discovery.SetServiceURL("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api")
}

SDK managing the token.

Replace {username} and {password} with your IBM Cloud Pak for Data credentials. Replace {version} with the service version date. For {cpd_cluster_host}, {port}, {release}, and {instance_id}, see Service endpoint.

let authenticator = WatsonCloudPakForDataAuthenticator(username: "{username}", password: "{password}", url: "https://{cpd_cluster_host}{:port}")
let discovery = Discovery(version: "{version}", authenticator: authenticator)
discovery.serviceURL = "https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api"

SDK managing the token.

Replace {username} and {password} with your IBM Cloud Pak for Data credentials. Replace {version} with the service version date. For {cpd_cluster_host}, {port}, {release}, and {instance_id}, see Service endpoint.

CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
    );

DiscoveryService discovery = new DiscoveryService("{version}", authenticator);
discovery.SetServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

SDK managing the token.

Replace {username} and {password} with your IBM Cloud Pak for Data credentials. Replace {version} with the service version date. For {cpd_cluster_host}, {port}, {release}, and {instance_id}, see Service endpoint.

var authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
);

while (!authenticator.CanAuthenticate())
    yield return null;

var discovery = new DiscoveryService("{version}", authenticator);
discovery.SetServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

Service endpoint

The service endpoint is based on the IBM Cloud Pak for Data cluster and add-on service instance. The URL follows this pattern:

https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api
  • {cpd_cluster_host} represents the name or IP address of your deployed cluster.
  • {port} represents the port number on which the service listens.
  • {release} represents the release name that was specified when the Helm chart was installed.
  • {instance_id} represents the identifier of the service instance.

To find the base URL, view the details for the service instance from the IBM Cloud Pak for Data web client.

Use that URL in your requests to IBM Watson Discovery for IBM Cloud Pak for Data.

Set the URL by calling the setServiceUrl() method of the service instance.

Set the correct service URL by calling the url parameter when you create the service instance.

Set the correct service URL by calling the url parameter when you create the service instance or by calling the set_url() method of the service instance.

Set the correct service URL by calling the url parameter when you create the service instance or by calling the url= method of the service instance.

Set the correct service URL by the URL parameter when you create the service instance or by calling the SetURL= method of the service instance.

Set the correct service URL by setting the serviceURL property of the service instance.

Set the correct service URL by calling the SetEndpoint() method of the service instance.

Set the correct service URL by setting the Url property of the service instance.

Example

curl -X {request_method} -H "Authorization: Bearer {token}" "https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api/v2/{method}"

Example

CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator("https://{cpd_cluster_host}{:port}", "{username}", "{password}");
Discovery discovery = new Discovery("{version}", authenticator);
discovery.setServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

Example

const DiscoveryV2 = require('ibm-watson/discovery/v2');
const { CloudPakForDataAuthenticator } = require('ibm-watson/auth');

const discovery = new DiscoveryV2({
  version: '{version}',
  authenticator: new CloudPakForDataAuthenticator({
    username: '{username}',
    password: '{password}',
    url: 'https://{cpd_cluster_host}{:port}',
  }),
  url: 'https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api',
});

Example

from ibm_watson import DiscoveryV2
from ibm_cloud_sdk_core.authenticators import CloudPakForDataAuthenticator

authenticator = CloudPakForDataAuthenticator(
    '{username}',
    '{password}',
    'https://{cpd_cluster_host}{:port}'
)

discovery = DiscoveryV2(
    version='{version}',
    authenticator=authenticator
)

discovery.set_service_url('https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api')

Example

require "ibm_watson/authenticators"
require "ibm_watson/discovery_v2"
include IBMWatson

authenticator = Authenticators::CLoudPakForDataAuthenticator.new(
  username: "{username}",
  password: "{password}",
  url: "https://{cpd_cluster_host}{:port}"
)
discovery = DiscoveryV2.new(
  version: "{version}",
  authenticator: authenticator
)
discovery.service_url = "https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api"

Example

discovery, discoveryErr := discoveryv2.NewDiscoveryV2(options)

if discoveryErr != nil {
  panic(discoveryErr)
}

discovery.SetServiceURL("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api")

Example

let authenticator = CloudPakForDataAuthenticator(username: "{username}", password: "{password}", url: "https://{cpd_cluster_host}{:port}")
let discovery = Discovery(version: "{version}", authenticator: authenticator)
discovery.serviceURL = "https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api"

Example

CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
    );

DiscoveryService discovery = new DiscoveryService("{version}", authenticator);
discovery.SetServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

Default URL

https://gateway.watsonplatform.net/discovery/api

Example for the Washington DC location

var authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
);

while (!authenticator.CanAuthenticate())
    yield return null;

var discovery = new DiscoveryService("{version}", authenticator);
discovery.SetServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

Disabling SSL verification

All Watson services use Secure Sockets Layer (SSL) (or Transport Layer Security (TLS)) for secure connections between the client and server. The connection is verified against the local certificate store to ensure authentication, integrity, and confidentiality.

If you use a self-signed certificate, you need to disable SSL verification to make a successful connection.

Enabling SSL verification is highly recommended. Disabling SSL jeopardizes the security of the connection and data. Disable SSL only if absolutely necessary, and take steps to enable SSL as soon as possible.

To disable SSL verification for a curl request, use the --insecure (-k) option with the request.

To disable SSL verification, create an HttpConfigOptions object and set the disableSslVerification property to true. Then pass the object to the service instance by using the configureClient method.

To disable SSL verification, set the disableSslVerification parameter to true when you create the service instance.

To disable SSL verification, update the call in two places. Specify True on disable_ssl_verification in the authenticator and on the set_disable_ssl_verification method for the service instance.

To disable SSL verification, specify true on the configure_http_client method for the service instance.

To disable SSL verification, call the DisableSSLVerification method on the service instance.

To disable SSL verification, call the disableSSLVerification() method on the service instance. You cannot disable SSL verification on Linux.

To disable SSL verification, set the disableSslVerification property to true in the Icp4dConfig object and set the DisableSslVerification method to true on the service instance.

To disable SSL verification, set the DisableSslVerification property in the Icp4dTokenOptions object.

Example that disables SSL verification

curl -k -X {request_method} -H "Authorization: Bearer {token}" "{url}/v2/{method}"

Example that disables SSL verification

CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator("https://{cpd_cluster_host}{:port}", "{username}", "{password}");
Discovery discovery = new Discovery("{version}", authenticator);
discovery.setServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api";

HttpConfigOptions configOptions = new HttpConfigOptions.Builder()
  .disableSslVerification(true)
  .build();
discovery.configureClient(configOptions);

Example that disables SSL verification

const DiscoveryV2 = require('ibm-watson/discovery/v2');
const { CloudPakForDataAuthenticator } = require('ibm-watson/auth');

const discovery = new DiscoveryV2({
  version: '{version}',
  authenticator: new CloudPakForDataAuthenticator({
    username: '{username}',
    password: '{password}',
    url: 'https://{cpd_cluster_host}{:port}',
  }),
  url: 'https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api',
  disableSslVerification: true,
});

Example that disables SSL verification

from ibm_watson import DiscoveryV2
from ibm_cloud_sdk_core.authenticators import CloudPakForDataAuthenticator

authenticator = CloudPakForDataAuthenticator(
    '{username}',
    '{password}',
    'https://{cpd_cluster_host}{:port}',
    disable_ssl_verification=True
)

discovery = DiscoveryV2(
    version='{version}',
    authenticator=authenticator
)

discovery.set_service_url('https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api')

discovery.set_disable_ssl_verification(True)

Example that disables SSL verification

require "ibm_watson/authenticators"
require "ibm_watson/discovery_v2"
include IBMWatson

authenticator = Authenticators::CLoudPakForDataAuthenticator.new(
  username: "{username}",
  password: "{password}",
  url: "https://{cpd_cluster_host}{:port}"
)
discovery = DiscoveryV2.new(
  version: "{version}",
  authenticator: authenticator
)
discovery.service_url = "https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api"

discovery.configure_http_client(disable_ssl: true)

Example that disables SSL verification

discovery, discoveryErr := discoveryv2.NewDiscoveryV2(options)

if discoveryErr != nil {
  panic(discoveryErr)
}

discovery.SetServiceURL("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api")

discovery.DisableSSLVerification()

Example that disables SSL verification

let authenticator = WatsonCloudPakForDataAuthenticator(username: "{username}", password: "{password}", url: "https://{cpd_cluster_host}{:port}")
let discovery = Discovery(version: "{version}", authenticator: authenticator)
discovery.serviceURL = "https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api"

discovery.disableSSLVerification()

Example that disables SSL verification

CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
    );

DiscoveryService discovery = new DiscoveryService("{version}", authenticator);
discovery.SetServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

discovery.DisableSslVerification(true);

Example that disables SSL verification

var authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
);

while (!authenticator.CanAuthenticate())
    yield return null;

var discovery = new DiscoveryService("{version}", authenticator);
discovery.SetServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

discovery.DisableSslVerification = true;

Versioning

API requests require a version parameter that takes a date in the format version=YYYY-MM-DD. When we change the API in a backwards-incompatible way, we release a new version date.

Send the version parameter with every API request. The service uses the API version for the date you specify, or the most recent version before that date. Don't default to the current date. Instead, specify a date that matches a version that is compatible with your app, and don't change it until your app is ready for a later version.

Specify the version to use on API requests with the version parameter when you create the service instance. The service uses the API version for the date you specify, or the most recent version before that date. Don't default to the current date. Instead, specify a date that matches a version that is compatible with your app, and don't change it until your app is ready for a later version.

This documentation describes the current version of IBM Watson Discovery for IBM Cloud Pak for Data, 2019-11-22. In some cases, differences in earlier versions are noted in the descriptions of parameters and response models.

Error handling

Discovery for IBM Cloud Pak for Data uses standard HTTP response codes to indicate whether a method completed successfully. HTTP response codes in the 2xx range indicate success. A response in the 4xx range is some sort of failure, and a response in the 5xx range usually indicates an internal system error that cannot be resolved by the user. Response codes are listed with the method.

ErrorResponse

Name Description
code
integer		 The HTTP response code.
error
string		 General description of an error.

The Java SDK generates an exception for any unsuccessful method invocation. All methods that accept an argument can also throw an IllegalArgumentException.

Exception Description
IllegalArgumentException An illegal argument was passed to the method.

When the Java SDK receives an error response from the IBM Watson Discovery for IBM Cloud Pak for Data service, it generates an exception from the com.ibm.watson.developer_cloud.service.exception package. All service exceptions contain the following fields.

Field Description
statusCode The HTTP response code that is returned.
message A message that describes the error.

When the Node SDK receives an error response from the Discovery for IBM Cloud Pak for Data service, it creates an Error object with information that describes the error that occurred. This error object is passed as the first parameter to the callback function for the method. The contents of the error object are as shown in the following table.

Error

Field Description
code The HTTP response code that is returned.
message A message that describes the error.

The Python SDK generates an exception for any unsuccessful method invocation. When the Python SDK receives an error response from the Discovery for IBM Cloud Pak for Data service, it generates an ApiException that contains the following fields.

Field Description
code The HTTP response code that is returned.
message A message that describes the error.
info A dictionary of additional information about the error.

When the Ruby SDK receives an error response from the Discovery for IBM Cloud Pak for Data service, it generates an ApiException that contains the following fields.

Field Description
code The HTTP response code that is returned.
message A message that describes the error.
info A dictionary of additional information about the error.

The Go SDK generates an error for any unsuccessful service instantiation and method invocation. You can check for the error immediately. The contents of the error object are as shown in the following table.

Error

Field Description
code The HTTP response code that is returned.
message A message that describes the error.

The Swift SDK returns a WatsonError in the completionHandler any unsuccessful method invocation. This error type is an enum that conforms to LocalizedError and contains an errorDescription property that returns an error message. Some of the WatsonError cases contain associated values that reveal more information about the error.

Field Description
errorDescription A message that describes the error.

When the .NET Standard SDK receives an error response from the Discovery service, it generates a ServiceResponseException that contains the following fields.

Field Description
Message A message that describes the error.
CodeDescription The HTTP response code that is returned.

When the Unity SDK receives an error response from the Discovery service, it generates an IBMError that contains the following fields.

Field Description
Url The URL that generated the error.
StatusCode The HTTP response code returned.
ErrorMessage A message that describes the error.
Response The contents of the response from the server.
ResponseHeaders A dictionary of headers returned by the request.

Example error handling

try {
  // Invoke a method
} catch (NotFoundException e) {
  // Handle Not Found (404) exception
} catch (RequestTooLargeException e) {
  // Handle Request Too Large (413) exception
} catch (ServiceResponseException e) {
  // Base class for all exceptions caused by error responses from the service
  System.out.println("Service returned status code "
    + e.getStatusCode() + ": " + e.getMessage());
}

Example error handling

discovery.method(params)
  .catch(err => {
    console.log('error:', err);
  });

Example error handling

from ibm_watson import ApiException
try:
    # Invoke a method
except ApiException as ex:
    print "Method failed with status code " + str(ex.code) + ": " + ex.message

Example error handling

require "ibm_watson"
begin
  # Invoke a method
rescue IBMWatson::ApiException => ex
  print "Method failed with status code #{ex.code}: #{ex.error}"
end

Example error handling

import "github.com/watson-developer-cloud/go-sdk/discoveryv2"

// Instantiate a service
discovery, discoveryErr := discoveryv2.NewDiscoveryV2(options)

// Check for errors
if discoveryErr != nil {
  panic(discoveryErr)
}

// Call a method
result, response, responseErr := discovery.methodName(&methodOptions)

// Check for errors
if responseErr != nil {
  panic(responseErr)
}

Example error handling

discovery.method() {
  response, error in

  if let error = error {
    switch error {
    case let .http(statusCode, message, metadata):
      switch statusCode {
      case .some(404):
        // Handle Not Found (404) exception
        print("Not found")
      case .some(413):
        // Handle Request Too Large (413) exception
        print("Payload too large")
      default:
        if let statusCode = statusCode {
          print("Error - code: \(statusCode), \(message ?? "")")
        }
      }
    default:
      print(error.localizedDescription)
    }
    return
  }

  guard let result = response?.result else {
    print(error?.localizedDescription ?? "unknown error")
    return
  }

  print(result)
}

Example error handling

try
{
    // Invoke a method
}
catch(ServiceResponseException e)
{
    Console.WriteLine("Error: " + e.Message);
}
catch (Exception e)
{
    Console.WriteLine("Error: " + e.Message);
}

Example error handling

// Invoke a method
discovery.MethodName(Callback, Parameters);

// Check for errors
private void Callback(DetailedResponse<ExampleResponse> response, IBMError error)
{
    if (error == null)
    {
        Log.Debug("ExampleCallback", "Response received: {0}", response.Response);
    }
    else
    {
        Log.Debug("ExampleCallback", "Error received: {0}, {1}, {3}", error.StatusCode, error.ErrorMessage, error.Response);
    }
}

Data handling

Additional headers

Some Watson services accept special parameters in headers that are passed with the request.

You can pass request header parameters in all requests or in a single request to the service.

To pass a request header, use the --header (-H) option with a curl request.

To pass header parameters with every request, use the setDefaultHeaders method of the service object.

To pass header parameters in a single request, use the addHeader method as a modifier on the request before you execute it.

To pass header parameters with every request, specify the headers parameter when you create the service object.

To pass header parameters in a single request, use the headers method as a modifier on the request before you execute it.

To pass header parameters with every request, specify the set_default_headers method of the service object.

To pass header parameters in a single request, include headers as a dict in the request.

To pass header parameters with every request, specify the add_default_headers method of the service object.

To pass header parameters in a single request, specify the headers method as a chainable method in the request.

To pass header parameters with every request, specify the SetDefaultHeaders method of the service object.

To pass header parameters in a single request, specify the Headers as a map in the request.

To pass header parameters with every request, add them to the defaultHeaders property of the service object.

To pass header parameters in a single request, pass the headers parameter to the request method.

To pass header parameters in a single request, use the WithHeader() method as a modifier on the request before you execute it.

To pass header parameters in a single request, use the WithHeader() method as a modifier on the request before you execute it.

Example header parameter in a request

curl -X {request_method} -H "Authorization: Bearer {token}" --header "Request-Header: {header_value}" "{url}/v2/{method}"

Example header parameter in a request

ReturnType returnValue = discovery.methodName(parameters)
  .addHeader("Custom-Header", "{header_value}")
  .execute();

Example header parameter in a request

const parameters = {
  {parameters}
};

discovery.methodName(
  parameters,
  headers: {
    'Custom-Header': '{header_value}'
  })
   .then(result => {
    console.log(response);
  })
  .catch(err => {
    console.log('error:', err);
  });

Example header parameter in a request

response = discovery.methodName(
    parameters,
    headers = {
        'Custom-Header': '{header_value}'
    })

Example header parameter in a request

response = discovery.headers(
  "Custom-Header" => "{header_value}"
).methodName(parameters)

Example header parameter in a request

result, response, responseErr := discovery.methodName(
  &methodOptions{
    Headers: map[string]string{
      "Accept": "application/json",
    },
  },
)

Example header parameter in a request

let customHeader: [String: String] = ["Custom-Header": "{header_value}"]
discovery.methodName(parameters, headers: customHeader) {
  response, error in
}

Example header parameter in a request

CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
    );

DiscoveryService discovery = new DiscoveryService("{version}", authenticator);
discovery.SetServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

discovery.WithHeader("Custom-Header", "header_value");

Example header parameter in a request

var authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
);

while (!authenticator.CanAuthenticate())
    yield return null;

var discovery = new DiscoveryService("{version}", authenticator);
discovery.SetServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

discovery.WithHeader("Custom-Header", "header_value");

Response details

IBM Watson Discovery for IBM Cloud Pak for Data might return information to the application in response headers.

To access all response headers that the service returns, include the --include (-i) option with a curl request. To see detailed response data for the request, including request headers, response headers, and additional debugging information, include the --verbose (-v) option with the request.

Example request to access response headers

curl -X {request_method} -H "Authorization: Bearer {token}" --include "{url}/v2/{method}"

To access information in the response headers, use one of the request methods that returns details with the response: executeWithDetails(), enqueueWithDetails(), or rxWithDetails(). These methods return a Response<T> object, where T is the expected response model. Use the getResult() method to access the response object for the method, and use the getHeaders() method to access information in response headers.

Example request to access response headers

Response<ReturnType> response = discovery.methodName(parameters)
  .executeWithDetails();
// Access response from methodName
ReturnType returnValue = response.getResult();
// Access information in response headers
Headers responseHeaders = response.getHeaders();

All response data is available in the Response<T> object that is returned by each method. To access information in the response object, use the following properties.

Property Description
result Returns the response for the service-specific method.
headers Returns the response header information.
status Returns the HTTP status code.

Example request to access response headers

discovery.methodName(parameters)
  .then(response => {
    console.log(response.headers);
  })
  .catch(err => {
    console.log('error:', err);
  });

The return value from all service methods is a DetailedResponse object. To access information in the result object or response headers, use the following methods.

DetailedResponse

Method Description
get_result() Returns the response for the service-specific method.
get_headers() Returns the response header information.
get_status_code() Returns the HTTP status code.

Example request to access response headers

discovery.set_detailed_response(True)
response = discovery.methodName(parameters)
# Access response from methodName
print(json.dumps(response.get_result(), indent=2))
# Access information in response headers
print(response.get_headers())
# Access HTTP response status
print(response.get_status_code())

The return value from all service methods is a DetailedResponse object. To access information in the response object, use the following properties.

DetailedResponse

Property Description
result Returns the response for the service-specific method.
headers Returns the response header information.
status Returns the HTTP status code.

Example request to access response headers

response = discovery.methodName(parameters)
# Access response from methodName
print response.result
# Access information in response headers
print response.headers
# Access HTTP response status
print response.status

The return value from all service methods is a DetailedResponse object. To access information in the response object or response headers, use the following methods.

DetailedResponse

Method Description
GetResult() Returns the response for the service-specific method.
GetHeaders() Returns the response header information.
GetStatusCode() Returns the HTTP status code.

Example request to access response headers

import (
  "github.com/IBM/go-sdk-core/core"
  "github.com/watson-developer-cloud/go-sdk/discoveryv2"
)

result, response, responseErr := discovery.methodName(&methodOptions)

// Access result
core.PrettyPrint(response.GetResult(), "Result ")

// Access response headers
core.PrettyPrint(response.GetHeaders(), "Headers ")

// Access status code
core.PrettyPrint(response.GetStatusCode(), "Status Code ")

All response data is available in the WatsonResponse<T> object that is returned in each method's completionHandler.

Example request to access response headers

discovery.methodName(parameters) {
  response, error in

  guard let result = response?.result else {
    print(error?.localizedDescription ?? "unknown error")
    return
  }
  print(result) // The data returned by the service
  print(response?.statusCode)
  print(response?.headers)
}

The response contains fields for response headers, response JSON, and the status code.

DetailedResponse

Example request to access response headers

var results = discovery.MethodName(parameters);

var result = results.Result;            //  The result object
var responseHeaders = results.Headers;  //  The response headers
var responseJson = results.Response;    //  The raw response JSON
var statusCode = results.StatusCode;    //  The response status code
Property Description
Result Returns the result for the service-specific method.
Response Returns the raw JSON response for the service-specific method.
Headers Returns the response header information.
StatusCode Returns the HTTP status code.

DetailedResponse

Property Description
Result Returns the result for the service-specific method.
Response Returns the raw JSON response for the service-specific method.
Headers Returns the response header information.
StatusCode Returns the HTTP status code.

Example request to access response headers

private void Example()
{
    discovery.MethodName(Callback, Parameters);
}

private void Callback(DetailedResponse<ResponseType> response, IBMError error)
{
    var result = response.Result;                 //  The result object
    var responseHeaders = response.Headers;       //  The response headers
    var responseJson = reresponsesults.Response;  //  The raw response JSON
    var statusCode = response.StatusCode;         //  The response status code
}

Data labels

You can remove customer data if you associate the customer and the data when you send the information to a service. First, you label the data with a customer ID, and then you can delete the data by the ID.

  • Use the X-Watson-Metadata header to associate a customer ID with the data. By adding a customer ID to a request, you indicate that it contains data that belongs to that customer.

    Specify a random or generic string for the customer ID. Do not include personal data, such as an email address. Pass the string customer_id={id} as the argument of the header.

  • Use the Delete labeled data method to remove data that is associated with a customer ID.

Labeling data is used only by methods that accept customer data. For more information about IBM Watson Discovery for IBM Cloud Pak for Data and labeling data, see Information security.

For more information about how to pass headers, see Additional headers.

Synchronous and asynchronous requests

The Java SDK supports both synchronous (blocking) and asynchronous (non-blocking) execution of service methods. All service methods implement the ServiceCall interface.

  • To call a method synchronously, use the execute method of the ServiceCall interface. You can call the execute method directly from an instance of the service.
  • To call a method asynchronously, use the enqueue method of the ServiceCall interface to receive a callback when the response arrives. The ServiceCallback interface of the method's argument provides onResponse and onFailure methods that you override to handle the callback.

The Ruby SDK supports both synchronous (blocking) and asynchronous (non-blocking) execution of service methods. All service methods implement the Concurrent::Async module. When you use the synchronous or asynchronous methods, an IVar object is returned. You access the DetailedResponse object by calling ivar_object.value.

For more information about the Ivar object, see the IVar class docs.

  • To call a method synchronously, either call the method directly or use the .await chainable method of the Concurrent::Async module.

    Calling a method directly (without .await) returns a DetailedResponse object.

  • To call a method asynchronously, use the .async chainable method of the Concurrent::Async module.

You can call the .await and .async methods directly from an instance of the service.

Example synchronous request

ReturnType returnValue = discovery.method(parameters).execute();

Example asynchronous request

discovery.method(parameters).enqueue(new ServiceCallback<ReturnType>() {
  @Override public void onResponse(ReturnType response) {
    . . .
  }
  @Override public void onFailure(Exception e) {
    . . .
  }
});

Example synchronous request

response = discovery.method_name(parameters)

or

response = discovery.await.method_name(parameters)

Example asynchronous request

response = discovery.async.method_name(parameters)

Related information

Methods

List collections

Lists existing collections for the specified project.

Lists existing collections for the specified project.

Lists existing collections for the specified project.

Lists existing collections for the specified project.

Lists existing collections for the specified project.

Lists existing collections for the specified project.

Lists existing collections for the specified project.

Lists existing collections for the specified project.

Lists existing collections for the specified project.

GET /v2/projects/{project_id}/collections
(discovery *DiscoveryV2) ListCollections(listCollectionsOptions *ListCollectionsOptions) (result *ListCollectionsResponse, response *core.DetailedResponse, err error)
ServiceCall<ListCollectionsResponse> listCollections(ListCollectionsOptions listCollectionsOptions)
listCollections(params, [callback()])
list_collections(self, project_id, **kwargs)
list_collections(project_id:)
func listCollections(
    projectID: String,
    headers: [String: String]? = nil,
    completionHandler: @escaping (WatsonResponse<ListCollectionsResponse>?, WatsonError?) -> Void)
ListCollections(string projectId)
ListCollections(Callback<ListCollectionsResponse> callback, string projectId)
Request

Instantiate the ListCollectionsOptions struct and set the fields to provide parameter values for the ListCollections method.

Use the ListCollectionsOptions.Builder to create a ListCollectionsOptions object that contains the parameter values for the listCollections method.

Path Parameters

  • project_id
    string

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression ^[a-zA-Z0-9_-]*$

Query Parameters

  • version
    string

    Release date of the version of the API you want to use. Specify dates in YYYY-MM-DD format. The current version is 2019-11-22.

ListCollectionsOptions

The ListCollections options.

ListCollectionsOptions

The listCollections options.

parameters

  • projectId
    string

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

parameters

  • project_id
    str

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

parameters

  • project_id
    String

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

parameters

  • projectID
    String

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

parameters

  • projectId
    string

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

parameters

  • projectId
    string

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

  • curl -H "Authorization: Bearer {token}" 'https://{cpd_cluster_host}:{port}/discovery/{release}/instance/{instance_id}/api/v2/projects/{project_id}/collections?version=2019-11-29'
  • CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator("https://{cpd_cluster_host}{:port}", "{username}", "{password}");
Discovery discovery = new Discovery("2019-11-22", authenticator);
discovery.setServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

ListCollectionsOptions options = new ListCollectionsOptions.Builder()
  .projectId("{project_id}")
  .build();

ListCollectionsResponse response = discovery.listCollections(options).execute().getResult();

System.out.println(response);
  • const DiscoveryV2 = require('ibm-watson/discovery/v2');
const { CloudPakForDataAuthenticator } = require('ibm-watson/auth');

const discovery = new DiscoveryV2({
  authenticator: new CloudPakForDataAuthenticator({
    url: 'https://{cpd_cluster_host}{:port}',
    username: '{username}',
    password: '{password}',
  }),
  version: '2019-11-22',
  url: 'https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api',
});

const params = {
  projectId: '{projectId}',
};

discovery.listCollections(params)
  .then(response => {
    console.log(JSON.stringify(response.result, null, 2));
  })
  .catch(err => {
    console.log('error:', err);
  });

  • import json
from ibm_watson import DiscoveryV2
from ibm_cloud_sdk_core.authenticators import CloudPakForDataAuthenticator

authenticator = CloudPakForDataAuthenticator(
                              '{username}',
                              '{password}',
                              'https://{cpd_cluster_host}{:port}',
                               disable_ssl_verification=True)
discovery = DiscoveryV2(
  version='2019-11-22',
  authenticator=authenticator
)
discovery.set_service_url('{https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api}')

response = discovery.list_collections(
  project_id='{project_id}'
).get_result()

print(json.dumps(response, indent=2))

  • require "json"
require "ibm_watson/authenticators"
require "ibm_watson/discovery_v2"
include IBMWatson

authenticator = Authenticators::CloudPakForDataAuthenticator.new(
  username: "{username}",
  password: "{password}",
  url: "https://{cpd_cluster_host}{:port}"
)

discovery = DiscoveryV2.new(
  version: "2019-11-22",
  authenticator: authenticator
)
discovery.service_url = "https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api"

service_response = discovery.list_collections(
  project_id: "{project_id}"
)
puts JSON.pretty_generate(service_response.result)
  • package main

import (
  "encoding/json"
  "fmt"
  "github.com/IBM/go-sdk-core/core"
  "github.com/watson-developer-cloud/go-sdk/discoveryv2"
)

func main() {
  authenticator := &core.CloudPakForDataAuthenticator{
    URL:                    "https://{cpd_cluster_host}{:port}",
    Username:               "{username}",
    Password:               "{password}",
    DisableSSLVerification: true,
  }
  options := &discoveryv2.DiscoveryV2Options{
    Version:       "2019-11-22",
    Authenticator: authenticator,
  }
  service, serviceErr := discoveryv2.NewDiscoveryV2(options)
  if serviceErr != nil {
    panic(serviceErr)
  }
  service.SetServiceURL("{https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api}")

  result, _, responseErr := service.ListCollections(&discoveryv2.ListCollectionsOptions{
    ProjectID: core.StringPtr("{project_id}"),
  })
  if responseErr != nil {
    panic(responseErr)
  }
  b, _ := json.MarshalIndent(result, "", "  ")
  fmt.Println(string(b))
}
  • let authenticator = WatsonCloudPakForDataAuthenticator(username: username, password: password, url: url)

let discovery = Discovery(version: "2019-11-29", authenticator: authenticator)
discovery.serviceURL = "{url}"

discovery.listCollections(projectID: "{project_id}") {
  response, error in
  
  guard let collections = response?.result else {
    print(error?.localizedDescription ?? "unexpected error")
    return
  }

  print(collections)
}
  • CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
    );

DiscoveryService service = new DiscoveryService("2019-11-22", authenticator);
service.SetServiceUrl("{https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api}");

var result = service.ListCollections(
    projectId: "{project_id}"
    );

Console.WriteLine(result.Response);
  • var authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
);

while (!authenticator.CanAuthenticate())
    yield return null;

var discovery = new DiscoveryService("2019-11-22", authenticator);
discovery.SetServiceUrl("{url}");

ListCollectionsResponse listCollectionsResponse = null;
service.ListCollections(
    callback: (DetailedResponse<ListCollectionsResponse> response, IBMError error) =>
    {
        Log.Debug("DiscoveryServiceV2", "ListCollections result: {0}", response.Response);
        listCollectionsResponse = response.Result;
    },
    projectId: "{project_id}"
);

while (listCollectionsResponse == null)
    yield return null;
Response

Response Body

ListCollectionsResponse

Response object containing an array of collection details.

ListCollectionsResponse

Response object containing an array of collection details.

Example:

ListCollectionsResponse

Response object containing an array of collection details.

Example:

ListCollectionsResponse

Response object containing an array of collection details.

Example:

ListCollectionsResponse

Response object containing an array of collection details.

Example:

ListCollectionsResponse

Response object containing an array of collection details.

Example:

ListCollectionsResponse

Response object containing an array of collection details.

Example:

ListCollectionsResponse

Response object containing an array of collection details.

Example:

ListCollectionsResponse

Response object containing an array of collection details.

Example:

Status Code

  • 200

    Successful response.

  • 400

    Bad request.

Example responses
  • {
  "collections": [
    {
      "collection_id": "f1360220-ea2d-4271-9d62-89a910b13c37",
      "name": "example"
    }
  ]
}
  • {
  "collections": [
    {
      "collection_id": "f1360220-ea2d-4271-9d62-89a910b13c37",
      "name": "example"
    }
  ]
}

Query a project

By using this method, you can construct queries. For details, see the Discovery documentation.

By using this method, you can construct queries. For details, see the Discovery documentation.

By using this method, you can construct queries. For details, see the Discovery documentation.

By using this method, you can construct queries. For details, see the Discovery documentation.

By using this method, you can construct queries. For details, see the Discovery documentation.

By using this method, you can construct queries. For details, see the Discovery documentation.

By using this method, you can construct queries. For details, see the Discovery documentation.

By using this method, you can construct queries. For details, see the Discovery documentation.

By using this method, you can construct queries. For details, see the Discovery documentation.

POST /v2/projects/{project_id}/query
(discovery *DiscoveryV2) Query(queryOptions *QueryOptions) (result *QueryResponse, response *core.DetailedResponse, err error)
ServiceCall<QueryResponse> query(QueryOptions queryOptions)
query(params, [callback()])
query(self, project_id, collection_ids=None, filter=None, query=None, natural_language_query=None, aggregation=None, count=None, return_=None, offset=None, sort=None, highlight=None, spelling_suggestions=None, table_results=None, suggested_refinements=None, passages=None, **kwargs)
query(project_id:, collection_ids: nil, filter: nil, query: nil, natural_language_query: nil, aggregation: nil, count: nil, _return: nil, offset: nil, sort: nil, highlight: nil, spelling_suggestions: nil, table_results: nil, suggested_refinements: nil, passages: nil)
func query(
    projectID: String,
    collectionIDs: [String]? = nil,
    filter: String? = nil,
    query: String? = nil,
    naturalLanguageQuery: String? = nil,
    aggregation: String? = nil,
    count: Int? = nil,
    `return`: [String]? = nil,
    offset: Int? = nil,
    sort: String? = nil,
    highlight: Bool? = nil,
    spellingSuggestions: Bool? = nil,
    tableResults: QueryLargeTableResults? = nil,
    suggestedRefinements: QueryLargeSuggestedRefinements? = nil,
    passages: QueryLargePassages? = nil,
    headers: [String: String]? = nil,
    completionHandler: @escaping (WatsonResponse<QueryResponse>?, WatsonError?) -> Void)
Query(string projectId, List<string> collectionIds = null, string filter = null, string query = null, string naturalLanguageQuery = null, string aggregation = null, long? count = null, List<string> _return = null, long? offset = null, string sort = null, bool? highlight = null, bool? spellingSuggestions = null, QueryLargeTableResults tableResults = null, QueryLargeSuggestedRefinements suggestedRefinements = null, QueryLargePassages passages = null)
Query(Callback<QueryResponse> callback, string projectId, List<string> collectionIds = null, string filter = null, string query = null, string naturalLanguageQuery = null, string aggregation = null, long? count = null, List<string> _return = null, long? offset = null, string sort = null, bool? highlight = null, bool? spellingSuggestions = null, QueryLargeTableResults tableResults = null, QueryLargeSuggestedRefinements suggestedRefinements = null, QueryLargePassages passages = null)
Request

Instantiate the QueryOptions struct and set the fields to provide parameter values for the Query method.

Use the QueryOptions.Builder to create a QueryOptions object that contains the parameter values for the query method.

Path Parameters

  • project_id
    string

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression ^[a-zA-Z0-9_-]*$

Query Parameters

  • version
    string

    Release date of the version of the API you want to use. Specify dates in YYYY-MM-DD format. The current version is 2019-11-22.

Request Body

QueryLarge

An object that represents the query to be submitted.

QueryOptions

The Query options.

QueryOptions

The query options.

parameters

  • projectId
    string

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

  • collectionIds
    string[]

    A comma-separated list of collection IDs to be queried against.

  • filter
    string

    A cacheable query that excludes documents that don't mention the query content. Filter searches are better for metadata-type searches and for assessing the concepts in the data set.

  • query
    string

    A query search returns all documents in your data set with full enrichments and full text, but with the most relevant documents listed first. Use a query search when you want to find the most relevant search results.

  • naturalLanguageQuery
    string

    A natural language query that returns relevant documents by utilizing training data and natural language understanding.

  • aggregation
    string

    An aggregation search that returns an exact answer by combining query search with filters. Useful for applications to build lists, tables, and time series. For a full list of possible aggregations, see the Query reference.

  • count
    number

    Number of results to return.

  • _return
    string[]

    A list of the fields in the document hierarchy to return. If this parameter not specified, then all top-level fields are returned.

  • offset
    number

    The number of query results to skip at the beginning. For example, if the total number of results that are returned is 10 and the offset is 8, it returns the last two results.

  • sort
    string

    A comma-separated list of fields in the document to sort on. You can optionally specify a sort direction by prefixing the field with - for descending or + for ascending. Ascending is the default sort direction if no prefix is specified. This parameter cannot be used in the same query as the bias parameter.

  • highlight
    boolean

    When true, a highlight field is returned for each result which contains the fields which match the query with <em></em> tags around the matching query terms.

    Default: false

  • spellingSuggestions
    boolean

    When true and the natural_language_query parameter is used, the natural_language_query parameter is spell checked. The most likely correction is returned in the suggested_query field of the response (if one exists).

    Default: false

  • tableResults

    Configuration for table retrieval.

  • suggestedRefinements

    Configuration for suggested refinements.

  • passages

    Configuration for passage retrieval.

parameters

  • project_id
    str

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

  • collection_ids
    List[str]

    A comma-separated list of collection IDs to be queried against.

  • filter
    str

    A cacheable query that excludes documents that don't mention the query content. Filter searches are better for metadata-type searches and for assessing the concepts in the data set.

  • query
    str

    A query search returns all documents in your data set with full enrichments and full text, but with the most relevant documents listed first. Use a query search when you want to find the most relevant search results.

  • natural_language_query
    str

    A natural language query that returns relevant documents by utilizing training data and natural language understanding.

  • aggregation
    str

    An aggregation search that returns an exact answer by combining query search with filters. Useful for applications to build lists, tables, and time series. For a full list of possible aggregations, see the Query reference.

  • count
    int

    Number of results to return.

  • return_
    List[str]

    A list of the fields in the document hierarchy to return. If this parameter not specified, then all top-level fields are returned.

  • offset
    int

    The number of query results to skip at the beginning. For example, if the total number of results that are returned is 10 and the offset is 8, it returns the last two results.

  • sort
    str

    A comma-separated list of fields in the document to sort on. You can optionally specify a sort direction by prefixing the field with - for descending or + for ascending. Ascending is the default sort direction if no prefix is specified. This parameter cannot be used in the same query as the bias parameter.

  • highlight
    bool

    When true, a highlight field is returned for each result which contains the fields which match the query with <em></em> tags around the matching query terms.

    Default: false

  • spelling_suggestions
    bool

    When true and the natural_language_query parameter is used, the natural_language_query parameter is spell checked. The most likely correction is returned in the suggested_query field of the response (if one exists).

    Default: false

  • table_results

    Configuration for table retrieval.

  • suggested_refinements

    Configuration for suggested refinements.

  • passages

    Configuration for passage retrieval.

parameters

  • project_id
    String

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

  • collection_ids
    Array[String]

    A comma-separated list of collection IDs to be queried against.

  • filter
    String

    A cacheable query that excludes documents that don't mention the query content. Filter searches are better for metadata-type searches and for assessing the concepts in the data set.

  • query
    String

    A query search returns all documents in your data set with full enrichments and full text, but with the most relevant documents listed first. Use a query search when you want to find the most relevant search results.

  • natural_language_query
    String

    A natural language query that returns relevant documents by utilizing training data and natural language understanding.

  • aggregation
    String

    An aggregation search that returns an exact answer by combining query search with filters. Useful for applications to build lists, tables, and time series. For a full list of possible aggregations, see the Query reference.

  • count
    Fixnum

    Number of results to return.

  • _return
    Array[String]

    A list of the fields in the document hierarchy to return. If this parameter not specified, then all top-level fields are returned.

  • offset
    Fixnum

    The number of query results to skip at the beginning. For example, if the total number of results that are returned is 10 and the offset is 8, it returns the last two results.

  • sort
    String

    A comma-separated list of fields in the document to sort on. You can optionally specify a sort direction by prefixing the field with - for descending or + for ascending. Ascending is the default sort direction if no prefix is specified. This parameter cannot be used in the same query as the bias parameter.

  • highlight
    Boolean

    When true, a highlight field is returned for each result which contains the fields which match the query with <em></em> tags around the matching query terms.

    Default: false

  • spelling_suggestions
    Boolean

    When true and the natural_language_query parameter is used, the natural_language_query parameter is spell checked. The most likely correction is returned in the suggested_query field of the response (if one exists).

    Default: false

  • table_results

    Configuration for table retrieval.

  • suggested_refinements

    Configuration for suggested refinements.

  • passages

    Configuration for passage retrieval.

parameters

  • projectID
    String

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

  • collectionIDs
    [String]

    A comma-separated list of collection IDs to be queried against.

  • filter
    String

    A cacheable query that excludes documents that don't mention the query content. Filter searches are better for metadata-type searches and for assessing the concepts in the data set.

  • query
    String

    A query search returns all documents in your data set with full enrichments and full text, but with the most relevant documents listed first. Use a query search when you want to find the most relevant search results.

  • naturalLanguageQuery
    String

    A natural language query that returns relevant documents by utilizing training data and natural language understanding.

  • aggregation
    String

    An aggregation search that returns an exact answer by combining query search with filters. Useful for applications to build lists, tables, and time series. For a full list of possible aggregations, see the Query reference.

  • count
    Int

    Number of results to return.

  • `return`
    [String]

    A list of the fields in the document hierarchy to return. If this parameter not specified, then all top-level fields are returned.

  • offset
    Int

    The number of query results to skip at the beginning. For example, if the total number of results that are returned is 10 and the offset is 8, it returns the last two results.

  • sort
    String

    A comma-separated list of fields in the document to sort on. You can optionally specify a sort direction by prefixing the field with - for descending or + for ascending. Ascending is the default sort direction if no prefix is specified. This parameter cannot be used in the same query as the bias parameter.

  • highlight
    Bool

    When true, a highlight field is returned for each result which contains the fields which match the query with <em></em> tags around the matching query terms.

    Default: false

  • spellingSuggestions
    Bool

    When true and the natural_language_query parameter is used, the natural_language_query parameter is spell checked. The most likely correction is returned in the suggested_query field of the response (if one exists).

    Default: false

  • tableResults

    Configuration for table retrieval.

  • suggestedRefinements

    Configuration for suggested refinements.

  • passages

    Configuration for passage retrieval.

parameters

  • projectId
    string

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

  • collectionIds
    List<string>

    A comma-separated list of collection IDs to be queried against.

  • filter
    string

    A cacheable query that excludes documents that don't mention the query content. Filter searches are better for metadata-type searches and for assessing the concepts in the data set.

  • query
    string

    A query search returns all documents in your data set with full enrichments and full text, but with the most relevant documents listed first. Use a query search when you want to find the most relevant search results.

  • naturalLanguageQuery
    string

    A natural language query that returns relevant documents by utilizing training data and natural language understanding.

  • aggregation
    string

    An aggregation search that returns an exact answer by combining query search with filters. Useful for applications to build lists, tables, and time series. For a full list of possible aggregations, see the Query reference.

  • count
    long?

    Number of results to return.

  • _return
    List<string>

    A list of the fields in the document hierarchy to return. If this parameter not specified, then all top-level fields are returned.

  • offset
    long?

    The number of query results to skip at the beginning. For example, if the total number of results that are returned is 10 and the offset is 8, it returns the last two results.

  • sort
    string

    A comma-separated list of fields in the document to sort on. You can optionally specify a sort direction by prefixing the field with - for descending or + for ascending. Ascending is the default sort direction if no prefix is specified. This parameter cannot be used in the same query as the bias parameter.

  • highlight
    bool?

    When true, a highlight field is returned for each result which contains the fields which match the query with <em></em> tags around the matching query terms.

    Default: false

  • spellingSuggestions
    bool?

    When true and the natural_language_query parameter is used, the natural_language_query parameter is spell checked. The most likely correction is returned in the suggested_query field of the response (if one exists).

    Default: false

  • tableResults

    Configuration for table retrieval.

  • suggestedRefinements

    Configuration for suggested refinements.

  • passages

    Configuration for passage retrieval.

parameters

  • projectId
    string

    The ID of the project. This information can be found from the deploy page of the Discovery administrative tooling.

    Constraints: 1 ≤ length ≤ 255, Value must match regular expression /^[a-zA-Z0-9_-]*$/

  • collectionIds
    List<string>

    A comma-separated list of collection IDs to be queried against.

  • filter
    string

    A cacheable query that excludes documents that don't mention the query content. Filter searches are better for metadata-type searches and for assessing the concepts in the data set.

  • query
    string

    A query search returns all documents in your data set with full enrichments and full text, but with the most relevant documents listed first. Use a query search when you want to find the most relevant search results.

  • naturalLanguageQuery
    string

    A natural language query that returns relevant documents by utilizing training data and natural language understanding.

  • aggregation
    string

    An aggregation search that returns an exact answer by combining query search with filters. Useful for applications to build lists, tables, and time series. For a full list of possible aggregations, see the Query reference.

  • count
    long?

    Number of results to return.

  • _return
    List<string>

    A list of the fields in the document hierarchy to return. If this parameter not specified, then all top-level fields are returned.

  • offset
    long?

    The number of query results to skip at the beginning. For example, if the total number of results that are returned is 10 and the offset is 8, it returns the last two results.

  • sort
    string

    A comma-separated list of fields in the document to sort on. You can optionally specify a sort direction by prefixing the field with - for descending or + for ascending. Ascending is the default sort direction if no prefix is specified. This parameter cannot be used in the same query as the bias parameter.

  • highlight
    bool?

    When true, a highlight field is returned for each result which contains the fields which match the query with <em></em> tags around the matching query terms.

    Default: false

  • spellingSuggestions
    bool?

    When true and the natural_language_query parameter is used, the natural_language_query parameter is spell checked. The most likely correction is returned in the suggested_query field of the response (if one exists).

    Default: false

  • tableResults

    Configuration for table retrieval.

  • suggestedRefinements

    Configuration for suggested refinements.

  • passages

    Configuration for passage retrieval.

  • curl -X POST -H "Authorization: Bearer {token}" -d '{"collection_ids": ["{collection_id_1}","{collection_id_1},"]"query": "text:IBM"}' 'https://{cpd_cluster_host}:{port}/discovery/{release}/instance/{instance_id}/api/v2/projects/{project_id}/query?version=2019-11-29'
  • CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator("https://{cpd_cluster_host}{:port}", "{username}", "{password}");
Discovery discovery = new Discovery("2019-11-22", authenticator);
discovery.setServiceUrl("https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api");

QueryOptions options = new QueryOptions.Builder()
  .projectId("{project_id}")
  .query("{field}:{value}")
  .build();

QueryResponse response = discovery.query(options).execute().getResult();

System.out.println(response);
  • const DiscoveryV2 = require('ibm-watson/discovery/v2');
const { CloudPakForDataAuthenticator } = require('ibm-watson/auth');

const discovery = new DiscoveryV2({
  authenticator: new CloudPakForDataAuthenticator({
    url: 'https://{cpd_cluster_host}{:port}',
    username: '{username}',
    password: '{password}',
  }),
  version: '2019-11-22',
  url: 'https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api',
});

const params = {
  projectId: '{projectId}',
  query: '{field}:{value}',
};

discovery.query(params)
  .then(response => {
    console.log(JSON.stringify(response.result, null, 2));
  })
  .catch(err => {
    console.log('error:', err);
  });

  • import json
from ibm_watson import DiscoveryV2
from ibm_cloud_sdk_core.authenticators import CloudPakForDataAuthenticator

authenticator = CloudPakForDataAuthenticator(
                              '{username}',
                              '{password}',
                              'https://{cpd_cluster_host}{:port}',
                               disable_ssl_verification=True)
discovery = DiscoveryV2(
  version='2019-11-22',
  authenticator=authenticator
)
discovery.set_service_url('{https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api}')

response = discovery.query(
  project_id='{project_id}',
  query='{field:value}'
).get_result()

print(json.dumps(response, indent=2))

  • require "json"
require "ibm_watson/authenticators"
require "ibm_watson/discovery_v2"
include IBMWatson

authenticator = Authenticators::CloudPakForDataAuthenticator.new(
  username: "{username}",
  password: "{password}",
  url: "https://{cpd_cluster_host}{:port}"
)

discovery = DiscoveryV2.new(
  version: "2019-11-22",
  authenticator: authenticator
)
discovery.service_url = "https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api"

service_response = discovery.query(
  project_id: "{project_id}",
  qhery: "{field}:{value}"
)
puts JSON.pretty_generate(service_response.result)
  • package main

import (
  "encoding/json"
  "fmt"
  "github.com/IBM/go-sdk-core/core"
  "github.com/watson-developer-cloud/go-sdk/discoveryv2"
)

func main() {
  authenticator := &core.CloudPakForDataAuthenticator{
    URL:                    "https://{cpd_cluster_host}{:port}",
    Username:               "{username}",
    Password:               "{password}",
    DisableSSLVerification: true,
  }
  options := &discoveryv2.DiscoveryV2Options{
    Version:       "2019-11-22",
    Authenticator: authenticator,
  }
  service, serviceErr := discoveryv2.NewDiscoveryV2(options)
  if serviceErr != nil {
    panic(serviceErr)
  }
  service.SetServiceURL("{https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api}")

  result, _, responseErr := service.Query(&discoveryv2.QueryOptions{
    ProjectID: core.StringPtr("{project_id}"),
    Query:     core.StringPtr("{field}:{value}"),
  })
  if responseErr != nil {
    panic(responseErr)
  }
  b, _ := json.MarshalIndent(result, "", "  ")
  fmt.Println(string(b))
}

  • let authenticator = WatsonCloudPakForDataAuthenticator(username: username, password: password, url: url)

let discovery = Discovery(version: "2019-11-29", authenticator: authenticator)
discovery.serviceURL = "{url}"

discovery.query(projectID: "{project_id}") {
  response, error in
  
  guard let results = response?.result else {
    print(error?.localizedDescription ?? "unexpected error")
    return
  }

  print(results)
}
  • CloudPakForDataAuthenticator authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
    );

DiscoveryService service = new DiscoveryService("2019-11-22", authenticator);
service.SetServiceUrl("{https://{cpd_cluster_host}{:port}/discovery/{release}/instances/{instance_id}/api}");

var result = service.Query(
    projectId: "{project_id}",
    query: "{field}:{value}"
    );

Console.WriteLine(result.Response);
  • var authenticator = new CloudPakForDataAuthenticator(
    url: "https://{cpd_cluster_host}{:port}",
    username: "{username}",
    password: "{password}"
);

while (!authenticator.CanAuthenticate())
    yield return null;

var discovery = new DiscoveryService("2019-11-22", authenticator);
discovery.SetServiceUrl("{url}");

QueryResponse queryResponse = null;
service.Query(
    callback: (DetailedResponse<QueryResponse> response, IBMError error) =>
    {
        Log.Debug("DiscoveryServiceV2", "Query result: {0}", response.Response);
        queryResponse = response.Result;
    },
    projectId: "{project_id}",
    query: "{field}:{value}"
);

while (queryResponse == null)
    yield return null;
Response

Response Body

QueryResponse

A response containing the documents and aggregations for the query.

QueryResponse

A response containing the documents and aggregations for the query.

Example:

QueryResponse

A response containing the documents and aggregations for the query.

Example:

QueryResponse

A response containing the documents and aggregations for the query.

Example:

QueryResponse

A response containing the documents and aggregations for the query.

Example:

QueryResponse

A response containing the documents and aggregations for the query.

Example: