Although Oracle Text does not provide a default thesaurus, Oracle Text does supply a thesaurus, in the form of a file that you load with ctxload, that can be used to create a general-purpose, English-language thesaurus.
The thesaurus load file can be used to create a default thesaurus for Oracle Text, or it can be used as the basis for creating thesauruses tailored to a specific subject or range of subjects.
This section contains the following topics.
Oracle Text Reference to learn more about using ctxload and the CTX_THES package, and "ctxload Utility" in this chapter
The supplied thesaurus is similar to a traditional thesaurus, such as Roget's Thesaurus, in that it provides a list of synonymous and semantically related terms.
The supplied thesaurus provides additional value by organizing the terms into a hierarchy that defines real-world, practical relationships between narrower terms and their broader terms.
Additionally, cross-references are established between terms in different areas of the hierarchy.
The exact name and location of the thesaurus load file is operating system dependent; however, the file is generally named dr0thsus (with an appropriate extension for text files) and is generally located in the following directory structure:
<Oracle_home_directory>
<interMedia_Text_directory>
sample
thes
Oracle Database Installation Guide for the installation documentation specific to your operating system for more information about the directory structure of Oracle Text