Industry collaboration in the original PDF/A Competence Center led to the development of the Isartor Test Suite in 2007 and 2008.
Working with the other members of the veraPDF consortium, including the Open Preservation Foundation,[REF] to respond to the EU Commission's PREFORMA project[REF] the PDF Association launched the PDF Validation Technical Working Group in November 2014 to articulate a plan for developing an industry-supported PDF/A validator [REF].