Key	Type	Mandatory?	Description
Title	text string	Optional	The Document's Title
Author	text string	Optional	Name of the person who created the document
Subject	text string	Optional	The subject of the document
Keywords	text string	Optional	Keywords
Creator	text string	Optional	If converted from another format, the name of the product that created the original document
Producer	text string	Optional	If converted from another format, the name of the product that converted it to PDF
CreationDate	date	Optional	Date and time the document was created
ModDate	date	Optional	Date and time of most recent modification
Trapped	name	Optional	Has the document been modified to include trapping information

Typical info object:

5 0 obj
<<
/Title (my first pdf)
/Author (John A Dearden)
/Subject (output of a test program)
/Keywords (test, pdf, program)
/CreationDate (D:20130216223614-08'00)
>>
endobj