style.dft
file. By default, the document layout consists of the entire document contents (the whole document file), beginning at row 1, column 1. The default filter specification identifies all Verity filters to be used, so all document formats can be indexed without configuration.
The advantage of the universal filter is that it removes the need to specify the document type and character set of documents before creating the collection, and it allows multiple document types written in multiple character sets to be indexed into the same collection.
The universal filter is configurable, as described in Chapter 6, "Document Filters and Formatting."
Using Your Own Filter
The Verity engine simply parses the document using the universal filter. If you develop your own filter, you can launch another filter through the use of a system call option available in the style.dft
file. Using this option, the output of the system call is treated as the virtual document which is passed to the indexing engine.