Supported Document Formats
Because the system can index most document formats, including HTML, PDF, Microsoft Word, and plain text, you can load any supported type into the text column.
When your text column has mixed formats, you can include a format column to help filtering during indexing, and you can specify whether a document is binary (formatted) or text (nonformatted, such as HTML). If you mix HTML and XML documents in one index, you might not be able to configure your index to your needs; you cannot prevent style sheet information from being added to the index.
See Also: Oracle Text Reference for more information about the supported document formats