I have created a PDF and performed the PAC PDF Accessibility checker and got an "X" on the "Correct syntax of tags / rolls". The error seems to be occuring where I have a table on the page. I am not a coder so I am having difficulty in understanding the error. I have attached a screenshot. Any help would be greatly appreciated.
I'm a little bit ambivalent about PAC's tool.
I've some reservations about how ISO 32000-1 has been interpreted when setting the tool's "rules".
(What is considered correct syntax and what is considered proper role mapping are two examples.)
Consequently, I do not use it as a "sole-source" for checking tagged PDF.
With that said, the only way to fully validate proper element/tag syntax / semantics is by a "warm-body".
From the screen capture it appears the problem is related to the Table structure. (?)
A minor niggle- but "rolls" do not exist in ISO 32000-1's discussion.
"Role Mapping" does.
Example: The authoring application styles/paragraph tags are seen as the name of tags in the structure tree.
So, Word's "Normal" style may be seen.
However, ISO 32000-1 describes that such must be properly "Role Mapped" to one of the PDF elements (tags) defined in the Standard.
The PDF producer would role map "Normal" to "Paragraph", <P>.