PDF/A conformance constants.
PRN_PDFA_CONFORM_NONE
Turn off PDF/A output
PRN_PDFA_CONFORM_1B
PDF/A-1b:2005 compliant (ISO 19005-1:2005)
PRN_PDFA_CONFORM_1B_TC1
TC1:2007 compliant (ISO 19005-1:2005/Cor.1:2007)
