With Oracle Text you can create indexes of type CONTEXT, CTXCAT, and CTXRULE.
CONTEXT
CTXCAT
CTXRULE
This section contains these topics:
Summary of Procedure for Creating a Text Index
Creating Preferences
Creating Section Groups for Section Searching
Using Stopwords and Stoplists
Creating a CONTEXT Index
Creating a CTXCAT Index
Creating a CTXRULE Index
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