Compact-Documents format with the file extension ".Cpd" includes full version of document text. Document components as title, date, category, etc. are stored as separate fields to speed the processing time.
The purpose of the format is to to avoid expensive parsing of XML type of files and to avoid cost of overheads appearing when working with many smaller files (e.g. when the documents are stored individually in the separate files).
Each ".Cpd" file includes a sequence of parsed documents in a single file.