Information about the nature of the text can often consist of much more than a title and an author. Click here for an example of a document header.
These information fields provide the document with a whole document header which can be used by retrieval programs to search and sort on particular variables. For example, we might only be interested in looking at texts in a corpus that were written by women, so we could ask a computer program to retrieve texts where the author's gender variable is equal to "FEMALE".