[jira] [Comment Edited] (FOP-3165) [PATCH] FOP tags Tables in PDF 1.4 style if PDF/UA-1 mode active

    [ https://issues.apache.org/jira/browse/FOP-3165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17932258#comment-17932258 ] 

Nico Kutscherauer edited comment on FOP-3165 at 3/4/25 10:54 AM:
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As I wrote in the issue description: According to my research the tags {{{}TBody{}}}, {{THead}} and {{TFoot}} was introduced with PDF 1.5. There is an explicit check in FOP to skip the generation of these tags in PDF/A-1 and PDF-UA mode. In PDF/A-1 mode this is maybe ok, as it seems to be based on PDF 1.4. But PDF/UA is based on PDF 1.7. See [#comment-17819651].

That's why my provided patch for this issue just excludes the PDF-UA mode in this check.

 


was (Author: nkutsche):
As I wrote in the issue description: According to my research the tags {{{}TBody{}}}, {{THead}} and {{TFoot}} was introduced with PDF 1.5. There is an explicit check in FOP to skip the generation of these tags in PDF/A-1 and PDF-UA mode. In PDF/A-1 mode this is maybe ok, as it seems to be based on PDF 1.4. But PDF/UA is based on PDF 1.7. See "comment-17819651":https://issues.apache.org/jira/browse/FOP-3165?focusedCommentId=17819651&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17819651.

That's why my provided patch for this issue just excludes the PDF-UA mode in this check.

 

> [PATCH] FOP tags Tables in PDF 1.4 style if PDF/UA-1 mode active
> ----------------------------------------------------------------
>
>                 Key: FOP-3165
>                 URL: https://issues.apache.org/jira/browse/FOP-3165
>             Project: FOP
>          Issue Type: Bug
>    Affects Versions: 2.9
>         Environment: Windows 10, PAC 2021 for tagging analyzes.
>            Reporter: Nico Kutscherauer
>            Priority: Major
>              Labels: Accessibility, Table, Tagging
>         Attachments: FOP-3165.diff, table-14.jpg, table-ua.jpg, table.jpg
>
>
> Hi,
> this small GitHub project shows the problem:
> [https://github.com/nkutsche/fop-pdf-ua-table-tagging-issue]
>  
> A [table|https://github.com/nkutsche/fop-pdf-ua-table-tagging-issue/blob/main/table.fo] is rendered to PDF using FOP 2.9 with three different configs. The differences are:
> [Config 1: PDF 1.5 is requested|https://github.com/nkutsche/fop-pdf-ua-table-tagging-issue/blob/main/config/fop-config.xml].
> [Config 2: PDF 1.5 is requested and PDF/UA-1 mode is active.|https://github.com/nkutsche/fop-pdf-ua-table-tagging-issue/blob/main/config/fop-config-ua.xml]
> [Config 3: PDF 1.4 is requested.|https://github.com/nkutsche/fop-pdf-ua-table-tagging-issue/blob/main/config/fop-config14.xml]
>  
> I analyzed the result PDFs with PAC 2021 - this are the screenshots focosing the table footer:
>  
> ||Config 1: PDF 1.5||Config 2: PDF/UA-1||Config 3: PDF 1.4||
> |!table.jpg|width=481,height=200!|!table-ua.jpg|width=386,height=200!|!table-14.jpg|width=468,height=200!|
>  
>  
> You see that if the {{PDF/UA-1}} mode is *active* the tagging of {{{}TBody{}}}, {{THead}} and {{TFoot}} are lost and the {{TFoot}} row is missplaced (at least on my point of view).
> The reason for adding the PDF 1.4 version was, that PDF 1.4 knows only the tags {{{}Table{}}}, {{{}TR{}}}, {{TH}} and {{TD}} (See [PDF 1.4 specification|https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/pdfreference1.4.pdf] Table 9.22). With PDF 1.5 {{{}TBody{}}}, {{THead}} and {{TFoot}} was introduced (see [PDF 1.5 specification|https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/pdfreference1.5_v6.pdf] Table 10.22).
> *Conclusion:* FOP tags tables in PDF 1.4 style if PDF/UA-1 mode is *active* even if PDF 1.5 is generated. If PDF/UA-1 mode is *inactive* it tags tables in PDF 1.5 style even if PDF 1.4 is generated.
> Am I correct that this is not the desired behavior? I think we could live with the PDF 1.4 style if the table footer wouldn't be on top of the body. On my point of view this is also in the PDF 1.4 style wrong.
>  



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