Yes, "system" is the root node. I'll try Geert Josten's approach when I get to
work tomorrow. If anyone could cast some more light on where I've gone wrong, I'd
appreciate it.
Thanks.
--
Charles Knell
cknell(_at_)onebox(_dot_)com - email
-----Original Message-----
From: Xia Li <xli(_at_)galdosinc(_dot_)com>
Sent: Thu, 12 Jan 2006 15:39:58 -0800
To: <xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com>
Subject: RE: [xsl] XPath expression confusion
I just checked the spec. It seems to me that I gave a wrong explanation
about what you might be wrong.
The <xsl:otherwise> in your example should be equivalent to <xsl:when
test="not(system/components/component/requirement/@number .)">
So my guess is that something wrong with the path
"/system/components/component/requirement/@number". It seemed to give an
empty sequence.
Is the <system> a root node?
Lisa
-----Original Message-----
From: Xia Li [mailto:xli(_at_)galdosinc(_dot_)com]
Sent: Thursday, January 12, 2006 2:53 PM
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: RE: [xsl] XPath expression confusion
I think you need to use
<xsl:when test="not(/system/components/component/requirement/@number .)">
<requirement><xsl:value-of select="." /></requirement>
</xsl:when?
to look for the <number> element which no item in the sequence
"/system/components/component/requirement/@number" would match.
The <xsl:otherwise> in your style sheet is equivalent to the condition
<xsl:when test="/system/components/component/requirement/@number != .">
That means if there exists an item in the sequence selected by
"/system/components/component/requirement/@number" that is not equal to
the current value of <number> in the iteration, the condition is always
true. That is why you output all the value of <number> elements.
Lisa
-----Original Message-----
From: cknell(_at_)onebox(_dot_)com [mailto:cknell(_at_)onebox(_dot_)com]
Sent: Thursday, January 12, 2006 1:49 PM
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] XPath expression confusion
I have two files structured like this:
File A
-------
<requirements>
<requirement>
<number />
<requirement>
<number />
And so on to an arbitrary depth
</requirement>
</requirement>
</requirements>
File B
-------
<system>
<components>
<component>
<requirement number="" />
<requirement number="" />
<requirement number="" />
</component>
</components>
</system>
There will be an arbitrary number of components, each with an arbitrary
number of requirements.
My goal is to produce a document containing all the requirement/number
elements from File A that don't have a matching requirement/@number in
File B.
My unsuccessful approach is represented in this stylesheet fragment:
<xsl:variable name="all-reqs"
select="document('requirements.xml')/requirements//requirement/number"
/>
<xsl:template match="/">
<un-assigned-reqs>
<xsl:for-each select="$all-reqs">
<xsl:choose>
<xsl:when
test="/system/components/component/requirement/@number = ." />
<xsl:otherwise>
<requirement><xsl:value-of select="." /></requirement>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each>
</un-assigned-reqs>
</xsl:template>
It was my belief that the XPath expression in the test would search all
the number attribute values in the document for a value that matched the
value of the current iteration of the loop.
Instead, it seems that there are no matches, as I get one element output
for each iteration of the loop.
Can someone point out where I'm going wrong?
Thanks.
--
Charles Knell
cknell(_at_)onebox(_dot_)com - email
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