We are making some changes to the Term Extraction Web Service:
Please migrate to the Content Analysis service as the Term Extraction service will no longer be supported.
The Term Extraction Web Service provides a list of significant words or phrases extracted from a larger content.
Note: Due to the context being a potentially
lengthy string, Term Extraction requests should be submitted using an
HTTP POST request rather than GET. If you plan to use serialized
PHP output, consider CURL to
post the request rather than PHP's
You'll then need to remove the HTTP headers before evalutating the
See information on constructing REST queries
|appid||string (required)||The application ID. See Application IDs for more information.|
|context||string (required)||The context to extract terms from (UTF-8 encoded).|
|query||string||An optional query to help with the extraction process.|
|output||string: xml (default), json, php||The format for the output. If json is requested, the results will be returned in JSON format. If php is requested, the results will be returned in Serialized PHP format.|
|callback||string||The name of the callback function to wrap around the JSON data. The following characters are allowed: A-Z a-z 0-9 .  and _. If output=json has not been requested, this parameter has no effect. More information on the callback can be found in the Yahoo! Developer Network JSON Documentation.|
Sample Request (URL: http://search.yahooapis.com/ContentAnalysisService/V1/termExtraction):
The schema document for this service response is located at http://search.yahooapis.com/ContentAnalysisService/V1/TermExtractionResponse.xsd
|ResultSet||Contains all of the extracted terms.|
|Result||The text of each extracted term. Terms are returned in order of importance.|
The following is a sample response for the sample query above:
The Term Extraction service is available as an YQL table. The table name is
search.termextract. The request and response fields are the same as you would use the service directly.
If you are not familiar with YQL, see information on constructing YQL queries.
The Term Extraction service is limited to 5,000 queries per IP address per day and to noncommercial use. See information on rate limiting.
Please see our Usage Policy to learn about acceptable uses and how to request additional queries.
The Term Extraction service returns the standard errors. There are no service-specific errors.
The Term Extraction Search service is discussed on the yws-search-general mailing list.