Yahoo Content Analysis API

Yahoo Content Analysis replaces Yahoo!’s Term Extraction service and lets users perform content analysis on text or a URL. The API is able to extract key terms from the content and rank them based on their overall importance to the content.

The YahooContent Analysis API detects entities/concepts, categories, and relationships within unstructured content. It ranks those detected entities/concepts by their overall relevance, resolves those if possible into Wikipedia pages, and annotates tags with relevant meta-data. The API uses RESTful calls and responses are formatted in XML.