This TechNote lists all XMP schemas and properties which are allowed in PDF/A-1. Most importantly, it covers the predefined XMP schemas for use in PDF/A-1.
In addition to providing a convenient summary, it also contains notes and recommendations regarding the use of these properties in PDF/A-1. This TechNote also covers the PDF/A-1 requirements regarding synchronization of document info entries and XMP properties.
Originally published by the PDF/A Competence Center, now the PDF Association
Community: PDF/A TWG
Publications: PDF/A in a Nutshell 2.0, PDF/A Flyer