Add more date info to files:

• What is the date of the document was written
• What is the date of expiry of the document (contracts, leases, etc)
• Date fields should allow for year only, month & year only or full year, month and date. Sometimes not all parts of a date are known or relevant Using dates of this nature allow users to search for documents that are within a specified age, or older than x for archiving or other purposes