SVG extension not getting recognized

[Sobhan Jahangir]

Hey! I have uploaded two form of SVG files and one is getting recognized and one is not. 

On the first one everything shows up and the signature number is 3C 3F.

While the next SVG has signature number of 3C 73 and gets ID 0. 

I did not find anything that can match the signature number 3C 73. Is just something that hasn't been updated in PRONOM, is it something wrong with my file or is it something else? 

Appreciate all support, thanks!

[ross-spencer]

Hi Sobhan,

The first `3C3F" looks normal as it is the opening of an XML declaration: "<?" -- the latter looks like it might be a less formal SVG, i.e. an SVG snippet, e.g. beginning with "<svg" -- instead of the full XML declaration.

PRONOM doesn't currently have signatures for the snippet form, though as signature devs we know that it's just as likely a snippet is valid even if it doesn't follow the most strict definition, of, in this case, an XML file.

If it does look like it is SVG with everything except the XML definition then it might be worth opening a discussion about SVG or XML snippets here: https://github.com/digital-preservation/PRONOM_Research/issues -- there might be a way to relax the signature, or there might be some clarity on the PRONOM policy on snippets to provide/document, or some other solution, e.g. a new PUID.

There is a related XML conversation (https://github.com/ffdev-info/wikidp-issues/issues/36) the PRONOM team are aware of and have been part of but it is difficult to get traction on with lots of competing priorities for folk. But still, it's good to raise awareness.

Best,

Ross

[Sobhan Jahangir]

Thanks for your help! The layout with the XML tag is because the SVG is converted in to JSX format. I have now opened up a new issue on this and hopefully it will be put into PRONOM.

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