https://bugs.documentfoundation.org/show_bug.cgi?id=148934

--- Comment #1 from Christophe Strobbe <[email protected]> ---
Hi Olivier,

If I understand this bug report correctly, it consists of two issues (on the
ODF side):

1. The GUI provides no mechanism to add text alternatives to any types of
hyperlinks (both normal links and ToC entries), i.e. authors can't do anything
that adds an office:title attribute to text:a elements. (Appendix D.2
"Hyperlink Titles" of Part 3 of the ODF 1.3 spec explains that office:title on
a text:a element should be exposed to assistive technologies as the "accessible
description".)
2. When you edit content.xml to add the office:title attribute to text:a
elements, this elements does not get exported to PDF.

On the PDF side, Link tags (both for regular hyperlinks and descendants of TOCI
elements) have a number of attributes and values:
- Type (Link)
- Title (empty)
- Actual Text (empty)
- Alternate Text (empty)
- ID (empty)
- Language.

In order to satisfy PAC 2021 (PDF Accessibility Checker 2021), Link tags need
an Alternative Text. So we need 
1. a way to fill in office:title on the authoring side, and
2. a mapping between ODF's office:title and PDF's Alternative Text.

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