Archieving Canonical PDF Validation
While PDF is the best currently available option for archiving fixed-form electronic documents, low quality PDF files remain problematic throughout the document lifecycle, and can pose substantial challenges for memory institutions.

This paper proposes a model for realizing and promulgating PDF validation based on a canonical (i.e. accepted industry-wide as definitive) approach rather than focusing on preservation per se.  
["Johnson, Duff"]
["pdf", "pdf/a", "software", "validation", "standard", "canonical", "adoption"]