Explicit setting of document dates

The Blossom engine allows results to be sorted by relevance or by date. Usually the date for a document is taken from the file system, but sometimes that date is not accurate, such as when the document is generated dynamically or when the files have been copied. For HTML files, the document date can be set using the HTTP-EQUIV meta tag (see the Search Guide for details.) Recently we have added the same capability to PDF files--the technique is described in the Search Guide section mentioned above.