XML DTD help for binary data
cowan at locke.ccil.org
Tue Jun 16 22:56:05 BST 1998
Gang He wrote:
> I am working on writing a XML DTD to describe a data file. The file will
> contain some binary data. I understand that I can use Entity and
> Notation to do the job. But for some reason I have to make the file
> containing the binary data a XML document file. Could someone please
> tell me whether I can use PCDATA for the binary data directly
A bad idea, as XML files are UTF-8 by default, and your binary data
will probably not be. You can use an XML declaration to make use of
an 8-bit charset like 8859-1, but that will cause the file to be
woefully misinterpreted by anyone else who gets it, which is contrary
to the spirit of XML.
> or I
> should make all binary characters into character references and then put
> them in PCDATA? And if I need make all binary characters into character
> references first, is there any way to convert the binary character into
> character reference automatically?
To really give a decent answer, we need to know what the binary data
is and why it's there. The most XML-like solution is to take the
binary data and remap it into character data in a way that depends
on the type (if integer, as decimal numbers; if structured, using
Give us more details, please.
John Cowan http://www.ccil.org/~cowan cowan at ccil.org
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)
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