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RE: parameter use in XPath

2003-10-22 16:07:24
In XSLT 1.0, patterns must not contain variable references.

In XSLT 2.0, you can write

<xsl:template match="*[name()=$keyword]">

which I suspect is what you meant.

Michael Kay

-----Original Message-----
From: owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com 
[mailto:owner-xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com] On Behalf Of 
Saverio Perugini
Sent: 22 October 2003 23:44
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] parameter use in XPath


Hello,

Is it possible to use the parameter "keyword" (line 1) in
XPath expressions (lines 5, 13, and 27) in the following 
stylesheet without the use of specific processor extensions?

I know one may not use variables set by the stylesheet in
XPath expressions, but $keyword is passed from the command 
line and thus not computed or set by the stylesheet.

Many thanks in advance,
Saverio

--

 1:<xsl:param name="keyword"/>

 2:<xsl:template match="{$keyword}">
 3:   <xsl:apply-templates/>
 4:</xsl:template>

<!-- matches all nodes which have a descendant-or-self,
     which is an ancestor-or-self::d and a leaf,
     and does nothing with them -->
 5:<xsl:template match="node()[not 
(descendant-or-self::node()[ancestor-or-self::{$keyword} and 
count (child::node()) = 0])]">

 6:  <xsl:variable name="original-node" select="."/>
 7:  <xsl:variable name="original-node-name" select="name()"/>
 8:  <xsl:variable name="original-node-id" select="@id"/>

   <!-- match a node who has a descendant with a refid 
attribute, e.g., e -->
 9:  <xsl:if test="descendant::node()[(_at_)refid]">
10:    <xsl:for-each select="descendant::node()[(_at_)refid]">
11:        <xsl:variable name="target-id" select="@refid"/>
12:         <xsl:variable name="target-node" 
select="//node()[(_at_)id=$target-id]"/>
13:         <xsl:if 
test="$target-node[descendant-or-self::node()[ancestor-or-self
::{$keyword} and count (child::node()) = 0]]">

14:            <xsl:element name="{$original-node-name}">
15:               <xsl:attribute name="id">
16:                  <xsl:value-of select="$original-node-id"/>
17:               </xsl:attribute>
18:               <xsl:apply-templates select="$original-node/*"/>
19:            </xsl:element>
20:         </xsl:if>
21:      </xsl:for-each>
22:   </xsl:if>
23:</xsl:template>

<!-- matches all crosslinks and -->
24:<xsl:template match="node()[(_at_)refid]" priority="0.7">
25:   <xsl:variable name="target-id" select="@refid"/>
26:   <xsl:variable name="target-node" 
select="//node()[(_at_)id=$target-id]"/>

   <!-- only copies those which have a descendant-or-self,
        which has a reference to a node,
        which is an ancestor-or-self::d and a leaf -->
27:   <xsl:if 
test="$target-node[descendant-or-self::node()[ancestor-or-self
::{$keyword} and count (child::node()) = 0]]">
28:      <xsl:copy>
29:         <xsl:attribute name="refid">
30:            <xsl:value-of select="$target-id"/>
31:         </xsl:attribute>
32:      </xsl:copy>
33:   </xsl:if>
34:</xsl:template>

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