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Posted to commits@daffodil.apache.org by GitBox <gi...@apache.org> on 2020/12/23 15:25:28 UTC

[GitHub] [incubator-daffodil] mbeckerle commented on pull request #463: Embedded Schematron

mbeckerle commented on pull request #463:
URL: https://github.com/apache/incubator-daffodil/pull/463#issuecomment-750348383


   If you are looking for negative tests, I recall the DFDL for JPEG without the schematron enforcement will literally accept /etc/termcap as a JPEG. Basically, any piece of line-noise bigger than some minimum is classified as a JPEG blob segment, and only the schematron rules enforce the proper positioning of these blob segments in a proper jpeg segment nest. I.e., the DFDL part does nothing to enforce the "grammar" rules of JPEG. So at least this one class of complete-line-noise negative examples for JPEG are easy. 


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