Re: [xsl] Unparsed-text-available returns true for XML files, so how do I distinguish XML files?

[Andrew Welch <andrew.j.welch@xxxxxxxxx>]

2010/1/3 Syd Bauman <Syd_Bauman@xxxxxxxxx>:
>> I use base-uri(/) and the sub-string functions to distinguish file
>> type.
>
> While I suspect this answers the OP's question, as he referred to
> file types in a way that indicates he is probably using the ultimate
> part of the file name to indicate the file type, what base-uri()
> really returns is the file's URI, and from that you can sub-string
> its name and part of that is its extension.
>
> But file extension and file type are *not* the same thing, although
> many folks (and many pieces of software) keep them in synch by
> convention. Just for starters, I have files with extensions of
>  .xml
>  .xhtml
>  .rng
>  .tei
>  .odd
>  .xsl
>  .fo
>  .xslt
>  .dbk
> that are all XML, and a few others that are only 1 automated step
> away from being XML (.sgml, .rnc). Of course I can compare the
> base-uri() to a list of recognizable extensions, but even this
> has problems. There may be no extension, or it may be non-
> standard, or it may be ambiguous.
>
> So, is there a way to ask "is this XML" without considering the
> file's name? I don't mind if it involves parsing the contents --
> after all, if it's not well-formed, it's not XML.

That's pretty much exactly what fn:doc-available() does... it only
returns true if calling doc() with that uri would return a document
node.



--
Andrew Welch
http://andrewjwelch.com
Kernow: http://kernowforsaxon.sf.net/