Bug 149067

Summary:	Accessibility of PDFs - Table of Contents + Table head cells
Product:	LibreOffice	Reporter:	p.brandt
Component:	Printing and PDF export	Assignee:	Thorsten Behrens (allotropia) <thb>
Status:	RESOLVED DUPLICATE
Severity:	enhancement	CC:	c_strobbe-fdo, michael.stahl, thb
Priority:	medium	Keywords:	accessibility
Version:	Inherited From OOo
Hardware:	All
OS:	Windows (All)
See Also:	https://bugs.documentfoundation.org/show_bug.cgi?id=148934 https://bugs.documentfoundation.org/show_bug.cgi?id=142376 https://bugs.documentfoundation.org/show_bug.cgi?id=149140
Whiteboard:
Crash report or crash signature:		Regression By:
Bug Depends on:
Bug Blocks:	139007
Attachments:	Testdocument (odt) Testcase (generated PDF) PAC-Report (German) for the PDF ZIP file containing an ODT test file and three PDF files derived from it

Description p.brandt 2022-05-13 11:18:04 UTC

Description:
If you export a Writer Document with tables and an index as PDF and check the result via PAC-Tool (https://pdfua.foundation/en/pdf-accessibility-checker-pac), they're three issues:

- Headcells without assigned sub-cells
- Tab order ist not set to "structure"
- Missing alternative Text (for table of contents)

Steps to Reproduce:
1. Create a new Writer document with a "Table of contents"
2. Add a table with head + bodycells
3. Save it as PDF
4. Check the result via PAC-Tool (Standard: PDF/UA-1)

Actual Results:
Issues with structure elements, tab order in table of contents, alernative descriptions

Expected Results:
No issues


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 7.1.2.2 (x64) / LibreOffice Community
Build ID: 8a45595d069ef5570103caea1b71cc9d82b2aae4
CPU threads: 12; OS: Windows 10.0 Build 19042; UI render: Skia/Raster; VCL: win
Locale: de-DE (de_DE); UI: de-DE
Calc: threaded

Comment 1 p.brandt 2022-05-13 11:20:11 UTC

Created attachment 180091 [details]
Testdocument (odt)

Testcase for the issue (odt)

Comment 2 p.brandt 2022-05-13 11:21:15 UTC

Created attachment 180093 [details]
Testcase (generated PDF)

Testcase - generated PDF from odt.

Comment 3 p.brandt 2022-05-13 11:22:33 UTC

Created attachment 180094 [details]
PAC-Report (German) for the PDF

The PAC Report for the PDF (german)

Comment 4 Timur 2022-05-13 13:22:09 UTC

I guess we may confirm for table header cell assignments. 
There are other reports in Bug 139007, I put some in See Also.

Comment 5 Christophe Strobbe 2022-05-18 10:57:37 UTC

Created attachment 180183 [details]
ZIP file containing an ODT test file and three PDF files derived from it

This bug report combines unrelated issues:

1. 'Headcells without assigned sub-cells': this is due to TH cells in the tagged PDF have their Scope attribute set to "None" (instead of "Column" for table column headers). See Bug 149140 (submitted because I was not aware of the current bug).
2. 'Tab order is not set to "structure"': AFAIK, this is an issue at the document level rather than the table level.
3. 'Missing alternative Text (for table of contents)': I think this is covered by Bug 148934 : 'TOC hyperlinks not compliant with PDF/UA, no <alt> contents'

I have also found that all of these issue already existed in tagged PDF file exported by OpenOffice.org Writer 3.3.0, so I think "Version" should be set to "Inherited from OOo".

I have attached a bunch of test files (uploaded as a ZIP):

- the ODT file is a slightly modified version of p.brandt's original test file (I removed the image);
- the first PDF file is a PDF based on the above generated with OpenOffice.org Writer 3.3.0;
- the PDF file whose name ends with "_corrected" is a version of the above in which I fixed many of the issues using Adobe Acrobat Pro;
- the last PDF file is the (German) report from PAC 2021 for the original PDF with some English annotations related to the three issues from the original bug report.

Comment 6 Michael Stahl (allotropia) 2022-11-16 14:27:04 UTC

i think that these are all duplicates and fixed?

- Headcells without assigned sub-cells => bug 149140
- Tab order ist not set to "structure" => bug 148934
- Missing alternative Text (for table of contents) => bug 148934

*** This bug has been marked as a duplicate of bug 149140 ***