It's because pandoc converts the URL of an image using HTML encoding and 
does not the reverse job while producing output.

Le samedi 12 août 2023 à 19:42:38 UTC+2, nopria a écrit :

> Yes it's an option, but I would like to understand why using plain text 
> does not work.
>
> Il giorno venerdì 11 agosto 2023 alle 12:23:32 UTC+2 Christophe Demko ha 
> scritto:
>
>> You could write a filter that convert a Inline SVG image defined by 
>> plain text into a Inline SVG image defined by BASE64
>>
>> Le jeudi 10 août 2023 à 15:39:40 UTC+2, nopria a écrit :
>>
>>> Following other tentatives 
>>> <https://github.com/jgm/pandoc/issues/4058#issuecomment-908942852> of 
>>> markdown to DOCX conversion containing external SVG, I tried to convert to 
>>> ODT a markdown containing **inline** SVG, such as the one below:
>>>
>>> # Example document
>>>
>>> This is an example of Markdown document with inline embedded SVG images.
>>>
>>> Inline SVG image defined by plain text:
>>>
>>> ![SVG Image](data:image/svg+xml;charset=utf-8,<?xml version="1.0"?><svg 
>>> xmlns="http://www.w3.org/2000/svg" width="100" height="100" 
>>> viewBox="-150 -150 300 300"><rect x="-100" y="-100" rx="8" ry="8" 
>>> width="200" height="200" style="fill:#CCCCFF;stroke:#000099"/></svg>)
>>>
>>> Inline SVG image defined by BASE64 converted text:
>>>
>>> ![SVG 
>>> Image](data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIj8+PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAiIGhlaWdodD0iMTAwIiB2aWV3Qm94PSItMTUwIC0xNTAgMzAwIDMwMCI+PHJlY3QgeD0iLTEwMCIgeT0iLTEwMCIgcng9IjgiIHJ5PSI4IiB3aWR0aD0iMjAwIiBoZWlnaHQ9IjIwMCIgc3R5bGU9ImZpbGw6I0NDQ0NGRjtzdHJva2U6IzAwMDA5OSIvPjwvc3ZnPg==)
>>>
>>> Some math to check if it works;
>>>
>>> $$A_c = 23 r^2 - v$$
>>>
>>> using command
>>>
>>> pandoc example.md -o example.odt
>>>
>>> with Pandoc 3.1.6.1. As you may confirm yourself, the BASE64 inline SVG 
>>> is correctly converted, while the textual inline SVG is not displayed in 
>>> the resulting ODT and the following warning appears at conversion:
>>>
>>> [WARNING] Could not fetch resource data:image/svg+xml;charset=utf-8 ...
>>>
>>> Given that a BASE64 inline SVG is enough to do the job, I would prefer 
>>> to avoid the BASE64 conversion and go with the plain text inline SVG.
>>>
>>> I already tried html encoding of SVG text and uppercase "utf8" without 
>>> success.
>>>
>>> I choose ODT because it's open and because it seems to display SVG 
>>> natively without needing PNG conversion (I hope it works with more complex 
>>> SVG too), which is a great feature.
>>>
>>> Thank in advance for your time.
>>>
>>

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