The CTX_ENTITY package enables you to search for terms that are unknown to you without specifying a particular search text. It does this by identifying names, places, dates, and other objects when they are mentioned in a document and by tagging each occurrence (called a mention) with its type and subtype. This process enables you to produce a structured view of a document that can later be used for text and data mining and more comprehensive intelligence analysis.
For the complete description of this package within the context of Oracle Text, see CTX_ENTITY in the Oracle Text Reference.