Re: [xsl] Comparing possibly empty string sequences

["G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>]

Ouch!  Of course I should have written:

  as="xsd:string*"

and not select= as I was thinking about the constraints but typing 
out of habit.  Too distracted today.

. . . . . . . . . . Ken

At 2010-03-23 15:51 +0100, G. Ken Holman wrote:
> At 2010-03-23 15:47 +0100, Martynas Jusevicius wrote:
> > a question somewhat related to my previous one.
> > Say I have $classes, a sequence of classnames (strings), possibly empty.
>
> Fine ... cardinality 0 to many.
>
> > Now I want to select elements which @class attribute contains any of
> > the classnames from $class:
> > h:*[@class/tokenize(., '\s+') = $break-classes)]
> >
> > In other words, select elements where tokenized @class intersects 
> > with $class.
> >
> > It works fine unless $classes is an empty sequence, in which case I
> > get an error:
> > "XTTE0570: An empty sequence is not allowed as the value of 
> > variable $classes"
>
> That is a declaration problem, not an executon problem.  You don't 
> show your declaration for $classes, but I'm assuming the declaration 
> does not accommodate a cardinality of zero.
>
> If it is:
>
>   <xsl:variable name="classes" select="xsd:string+"...
>
> ... then change it to:
>
>   <xsl:variable name="classes" select="xsd:string*"...
>
> I hope this helps.
>
> . . . . . . . . . Ken


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