IDOL OnDemand by HP offers an array of data processing APIs for format conversion, image analysis, indexing, search, and textual analysis. Preview capabilities exist to view how many of these RESTful APIs behave in action. The Delete from Text Index API allows one to delete content from an index that was previously inserted with the Add to Text Index API. To delete content, one can send a request to the Delete from Text Index API that includes the index name and the reference to the content one desires to delete. After deletion, the content will not be available for further use with additional APIs.