Re: [Bimi] [rfc-i] SVG P/S Feedback

[Leonard Rosenthol <[e-mail]>]

Brian - but what you describe below is a tooling problem not a technology or format issue.

There are ways in which all of the SVG semantics - or even the entire SVG itself(!) - could be included in the PDF/A file and round-tripped with correct fidelity (or even 100% identical bits).

Let's agree on what the goal is, come up with a standard that specifies how to achieve that, AND THEN we can get tools to comply.

Leonard

On 8/29/20, 1:04 AM, "rfc-interest on behalf of Brian E Carpenter" <[e-mail] on behalf of [e-mail]> wrote:

    Larry,

    On 29-Aug-20 10:55, Larry Masinter wrote:
    > One of the functional requirements for SVG illustrations is that when
    > converted to PDF/A that the result is "as good as it gets" so the authors
    > don't rely on embedded animations or videos to explain the protocol they are
    > describing.
    > 
    > What if you did a round trip   SVG -> PDF/A -> SVG. I think it's possible to
    > insure that doing so is idempotent (if it isn't now).

    Only if you had a round trip tool that magically preserves the SVG dialect
    in use. I just round-tripped a test file using https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fconvertio.co%2F&amp;data=02%7C01%7Clrosenth%40adobe.com%7Cf8108cd02b334c72415d08d84bd8f976%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637342742565624784&amp;sdata=1m8XMdcHkgmgUCf%2B4%2F0wEOI37suRSejjVpsbqqsHXI4%3D&amp;reserved=0.
    The PDF and the round-tripped SVG *look* the same as the original, but the
    actual content of the SVG file is totally different, and fails svgcheck, so
    is no longer conformant with RFC7996. The converter just happens to choose
    a different way of representing the same image, since SVG is so versatile.

    The converter also messed up the scalability of the image, which is really
    annoying if you want the image to be viewable on a tiny screen.

    Now I'll round-trip it a second time... once again, the input and output
    SVG files are different, although only in a few places. So even the
    conversion tools at convertio.co can't achieve idempotency with the SVG
    that they themselves generate.

    (For the record, convertio.co doesn't claim to be PDF/A conformant,
    but I think that's beside the point here.)

       Brian


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