veraPDF is an open source industry-supported PDF/A conformance checker developed by the members of the veraPDF consortium. The software validates all current parts and conformance levels of ISO 19005 (PDF/A[1]). This paper makes the case for open source format validation and describes the project’s approach to building and testing the software. It also explores how the unique partnership between cultural heritage organisations and PDF industry has created an active open source community.

iPRES, Kyoto

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