Why XML data typing is hard
Henry S. Thompson
ht at cogsci.ed.ac.uk
Mon Nov 30 23:02:34 GMT 1998
"Liam R. E. Quin" <liamquin at interlog.com> writes:
> Henry S. Thompson writes:
> > if we add sensitivity to language to our lexical typing, I might write
> > <balance xml:lang='fr'>4,50</balance>
> > <balance xml:lang='ar'>٤٫٥ʔ</balance>
> david at megginson.com wrote:
> > It sounds quite plausible: it still places a burden of locale handling
> > on the processor or the application, but that's inevitable when we're
> > dealing with lexical constraints. At least with this approach the
> > application will be able to fail gracefully:
> > Warning: sample.xml line 18 column 12: Cannot validate constraint
> > "float" for unsupported language "ar" (trying default
> > locale en-CA).
> Where did the word "float" come from in that error message?
> Is it part of an augmented DTD or Schema, or a stylesheet, or is it
> wired in to the application?
Sorry, I was too hasty in pruning the history of this thread:
somewhere back there David (I think) said (I paraphrase): "Consider a
'float' datatype declaration: it's not as straightforward as you might
think", and then offered the 4.5/4,5 alternation as an example.
Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
Fax: (44) 131 650-4587, e-mail: ht at cogsci.ed.ac.uk
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