Retrieving metadata from input documents

The PDFIN filter extracts metadata keys from the PDF input file. The metadata keys are automatically declared as variables.

Available metadata keys
Key	Variable	Description
Title	$Title	The title of the document.
Author	$Author	The name of the person who created the document.
Subject	$Subject	The subject of the document.
Keywords	$Keywords	Keywords associated with the document. Multiple keywords are comma separated.
Creator	$Creator	The application that created the source file, which was converted to PDF. For example Adobe FrameMaker®.
Producer	$Producer	The application that converted the source file to PDF. For example, StreamServer.
CreationDate	$CreationDate	The date and time the document was created.
ModDate	$ModDate	The date and time the document was most recently modified.
Pageorientation	$pageorientation	The page orientation (Portrait or Landscape).
Pagemedia	$pagemedia	The page media (A4, Letter, etc.).
Pageheight	$pageheight	The page height in millimeters.
Pagewidth	$pagewidth	The page width in millimeters.

You can use these variables directly in scripts, Processes, etc. For example, if you want to use the metadata key Pageorientation in a script, you have to include the variable $pageorientation.