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Oracle® Database PL/SQL Packages and Types Reference
11g Release 2 (11.2)

Part Number E16760-04
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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 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/data mining and more comprehensive intelligence analysis.

Documentation of CTX_ENTITY

For complete description of this package within the context of Oracle Text, see CTX_ENTITY in the Oracle Text Reference.