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Re: [xsl] filter using contains with multiple values


Subject: Re: [xsl] filter using contains with multiple values
From: "Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 3 Mar 2016 09:16:50 -0000

> On 2 Mar 2016, at 18:43, Raimund Kammering raimund.kammering@xxxxxxx
<xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
>
> Hi,
>
> I created a filter statement using two variables to a) specify the node of
interest and b) the value to be matched:
>
> XSL is like this:
> ...
> <xsl:if test="*[name()=$filter]=contains(., $filter_value)b>

*[name()=$filter] returns a set/sequence of element nodes; the contains()
function returns a boolean.

The result of comparing a node-set to a boolean depends on whether you are
running 1.0 (or 2.0 with backwards compatibility enabled) or 2.0.

In either case, I don't think it does what you want. I think you want

test="*[name()=$filter][contains(., $filter_value)]"

But perhaps you don't even want contains(). In your example, you are matching
the whole value, rather than a substring. That suggests that an "=" test is
wanted, not a "contains" test. So:

test="*[name()=$filter][. = $filter_value]"

Michael Kay
Saxonica

> b&
>
> feed with the following XML:
>
> <list>
>  <entry>
>    <keyword>Log</keyword>
>    <location>A</location>
>  </entry>
>  <entry>
>    <keyword>Log</keyword>
>    <location>B</location>
>  </entry>
>  <entry>
>    <keyword>Problem</keyword>
>    <location>A</location>
>  </entry>
>  <entry>
>    <keyword>Info</keyword>
>    <location>B</location>
>  </entry>
> </list>
>
> so that setting bfilterb to bkeywordb and bfilter_valueb to
bLogb will only match the first two bentryb nodes. Fine so far, but
now
> I would like to allow to pass in a flexile number of values for the
bfilter_valueb, like bLogb or bInfob to match the first two plus
the
> last entry. I guess the solution would be to do this in kind of a loop, but
how can this be done with bfilter_valueb being a
> simple XSL variable or is exactly this the weakness of the approach?
>
> Ibrunning Saxon version: 9.1.0.8 so that Ibm able to use XSLT and XPath
2.0.
>
> Thanks,
> Raimund


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