Specific xlink href baseUrl

If I well understood, when converting a svg to png, the attribute is parsed for the contained url.
However in some cases this url is relative; if I try to convert such kind of images on my machine when the svg image was downloaded from the internet, the python library looks for the link and then looks for the resource in the current folder, not in the remote baseUrl. Is it possible to specify this last somehow ?

Thanks in advance for the information

Start by tracing how SVG URLs are resolved during SVG-to-PNG conversion, especially when the referenced URL is relative. Determine how a remote base URL could be supplied, then verify that relative resources resolve against it rather than the current folder.

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