Sample code: Identify the context of natural language with the Watson Natural Language Classifier service
Interactive code: When you see Run at the top of a code sample, you can run the code, check the results, make changes, and run it again. When you see Deploy, you can deploy the code into the developerWorks IBM Cloud account. To deploy the code, please sign in.
About this code
This code shows you how to use the node.js API for the Watson natural language classification service. Given some text and a context, Watson analyzes the text and returns a list of categories relevant to that text.
The code has two basic sections:
main()method. This is the entry point to the code. It creates the
NaturalLanguageClassifierV1object and then invokes the
- A set of default parameters and the code that runs this module if it
is invoked by itself (as opposed to being invoked by a
require()statement). See the node.js documentation for more information on the implications of the
require.main === modulestatement.
Sign in to run, change, and deploy this code.
This code takes a string as input and classifies it based on the ID of a
classification context previously defined in Bluemix. The call to the
Promise to handle the asynchronous nature of the service. See
the overview of the Natural Language Classifier service or the github
repo for the Watson node.js API for more information.
Try changing the text to see what happens.
Using this code once deployed
To use this code once you've deployed it, you must create an instance of the Watson Natural Language Classifier service:
To invoke the code, pass a JSON structure that matches the
defaultParameters object as shown above with the following
classifier_idfield must contain the ID of a context you defined as part of the Natural Language Classifier service. This code will not work without a valid context ID. See the Natural Language Classifier documentation for details on how to create your own context.
urlfields must be filled in with the credentials for your Natural Language Classifier service instance.
use_unauthenticatedfield must be
For more information, see the developerWorks tutorial Invoking actions on the IBM Cloud Functions platform.
- An overview of the Watson Natural Language Classifier service
- Create a free Bluemix account
- Use Node.js and Watson to detect emotion, identify entities, and discover answers
- Node.js journeys on developer.ibm.com/code