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Re: [Wpack] package: URL scheme

Larry Masinter <LMM@acm.org> Fri, 12 June 2020 00:47 UTC

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From: Larry Masinter <LMM@acm.org>
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To: 'Martin Thomson' <mt@lowentropy.net>, wpack@ietf.org
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Date: Thu, 11 Jun 2020 17:47:32 -0700
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Subject: Re: [Wpack] package: URL scheme
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PDF allows embedded files. There was a requirement to allow URLs pointing to
embedded files and to allow identification of fragments..

>From https://tools.ietf.org/html/rfc8118#section-3 Fragment identifiers



   ef=<name>
      Identifies the embedded file where the parameter string <name>
      matches a file specification dictionary in the EmbeddedFiles name
      tree.  If the "ef" parameter is not at the end of the fragment
      identifier, then the rest of the fragment identifier (after the
      ampersand or hash delimiter) is applied to the embedded file
      according to its own media type.  This allows identification of
      content within the embedded file (which itself might be a
      PDF file)

      NOTE: When attempting to open a PDF file that is not from a
      trusted source, the processor may choose to prompt the user or
      even prevent the file from being opened.

There was no need to define a new scheme.

Sorry I'd forgotten about this.
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