[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: Binary Data in XML
Peter Murray-Rust wrote: > <CML:molecule xml:packed="base64" xml:mime="chemical/x-chemdraw">... base64 > encoding of horrid binary file ... </CML:molecule> > > I know that this can also be done using NOTATION but also that - like many > others - I don't know how to do it and have never seen a NOTATION used in > XML documents. I therefore support Tim's suggestion of bolting xml:packed > into the language and suggest xml:mime as a companion. Here's how. Insert the following declarations into the DTD (internal or external as desired): <!NOTATION chemical-x-chemdraw PUBLIC "-//whoever/whatever"> <!ATTLIST CML:molecule xml:mime NOTATION(chemical-x-chemdraw | another | another) #REQUIRED> and then just use it as above. A validating parser will guarantee that the value of the xml:mime attribute is one of the specified notations, and it will be possible to retrieve the external identifier for each notation so that you know what it means. The nice thing about this is that it just works if you are DTD-blind, but provides the information that a generalized processor for notation-governed elements needs to figure out what to do (e.g. render using a chemical/x-chemdraw renderer). -- John Cowan http://www.ccil.org/~cowan cowan@c... You tollerday donsk? N. You tolkatiff scowegian? Nn. You spigotty anglease? Nnn. You phonio saxo? Nnnn. Clear all so! 'Tis a Jute.... (Finnegans Wake 16.5) xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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