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Re: p:option not required without default value

From: Henry S. Thompson <ht@inf.ed.ac.uk>
Date: Fri, 29 Aug 2008 18:05:08 +0100
To: "Innovimax SARL" <innovimax@gmail.com>
Cc: "Norman Walsh" <ndw@nwalsh.com>, public-xml-processing-model-wg@w3.org
Message-ID: <f5bsksnpxa3.fsf@hildegard.inf.ed.ac.uk>

Hash: SHA1

Innovimax SARL writes:

> [[
> If an optional parameter has no select  attribute and has an empty
> sequence constructor, and if there is no as attribute, then the
> default value of the parameter is a zero length string.
> ]]

Yeah, but that's because its content is interpreted as a sequence
constructor, and in XSLT 1.0 it was a content spec., which defaulted
to the empty string, and so the above is for backwards compatibility.
p:option is necessarily empty.  The fact that uninitialised variables
and parameters are the empty string is a big source of bugs in XSLT,
in my experience.

- -- 
       Henry S. Thompson, School of Informatics, University of Edinburgh
                         Half-time member of W3C Team
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Received on Friday, 29 August 2008 17:05:51 UTC

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