SelfContained: unnecessary attributes in included SVG

[nxn-4-wdf]

Explain the problem.

I tested feature request #8948 (embed SVG in HTML 5 instead of data-uri).

The tested SVG starts with:

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="781px" height="401px" viewBox="-0.5 -0.5 781 401">

Output HTML file contains:

<svg id="svg_04f4959dcbbe8d34aaf17feb08637c00b4ae9263" alt="Environment overview" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="781px" height="401px" viewBox="-0.5 -0.5 781 401" width="782" height="402">

Issue:

• Attributes width and height are specified twice. Either keep the original or the generated one.

Optionally:

• Attributes xmlns, xmlns:xlink and version are unnecessary and can be safely deleted
• Hash value in SVG id contains 40 characters. This is too long, the first 20 chars are sufficient: even with 1 million SVGs in the document, the "anniversary collision" probability is (estimated) less than 1/10^12

Pandoc version?

Current Pandoc 3.1.6 on Windows