Maruan Sahyoun created PDFBOX-3541:
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Summary: Use /L entry to determine if a linearized file shall be
treated as such for PDF/A validation
Key: PDFBOX-3541
URL: https://issues.apache.org/jira/browse/PDFBOX-3541
Project: PDFBox
Issue Type: Improvement
Components: Preflight
Reporter: Maruan Sahyoun
Priority: Minor
With PDFBOX-3540 the detection of a linearized file which has later been
updated for PDF/A validation was improved so that provisions can be properly
applied or ignored. That could be improved by checking the /L entry of the
linearization dictionary. The *ISO 19005-1:2005/Cor.2:2011* has this:
{quote}
In a linearized PDF, if the ID keyword is present in both the first page
trailer dictionary and the last
trailer dictionary, the value to both instances of the ID keyword shall be
identical.
...
This provision shall not apply where the value to the L key in the
linearization dictionary does not match the actual length of the PDF.
{quote}
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