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RE: Xpath for a range of elements

Subject: RE: Xpath for a range of elements
From: "Anderson, Paul" <Paul.Anderson@xxxxxxxxxxxxx>
Date: Wed, 7 Feb 2007 19:04:03 -0500
RE:  Xpath for a range of elements
Thank you for the suggestions Michael.

Assigning procedure[1] to a variable and using the variable in the
predicate solved the problem.

-----Original Message-----
From: Michael Kay [mailto:mike@xxxxxxxxxxxx]
Sent: Wednesday, February 07, 2007 6:37 PM
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: RE:  Xpath for a range of elements

In this expression

<xsl:apply-templates select="*[. &lt;&lt; procedure[1]]"/>

you've forgotten that the context changes inside the predicate. Assign
procedure[1] to a variable first, and it should be OK.

Another way of doing this, which also works in 1.0, is:

<prereq>
  <xsl:apply-templates select="procedure/preceding-sibling::*"/>
</prereq>
<xsl:apply-templates select="./procedure"/> <postreq>
  <xsl:apply-templates select="procedure/following-sibling::*"/>
</postreq>

Michael Kay
http://www.saxonica.com/


> -----Original Message-----
> From: Anderson, Paul [mailto:Paul.Anderson@xxxxxxxxxxxxx]
> Sent: 07 February 2007 22:53
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject:  Xpath for a range of elements
>
> Greetings,
>
> Consider the following skeleton for an XML source file:
>
> <section>
>    <title>...</title>
>    <para>...</para>
>    <code-block>...</code-block>
>    <para>...</para>
>    <procedure>...</procedure>
>    <para>...</para>
>    <screen>...</screen>
>    <para>...</para>
> </section>
>
> I need a Xpath expression that will return all nodes after the <title>

> and before the <procedure> (i.e., from section/para[1] through
> section/para[2]). Then I operate on the <procedure>. Then I need
> another Xpath expression that returns all the nodes after the
> procedure up to the end of the <section> (i.e., from section/para[3]
> through section/para[4]. The source documents vary enough that I do
> not know in advance the number of elements or nature of the elements
> before or after the <procedure>. I do, however, know that there is
> always one (and only
> one) <procedure>.
>
> In my research, I came across the following thread on this list
> (http://www.biglist.com/lists/xsl-list/archives/200608/msg00043.html).
> This thread appeared to hold the answer for me but I can't make it
> work.
> I saw that the solution was specific to Xpath 2.0 so I made sure to
> upgrade to Saxon 8 and to update my scripts so that they would work
> (e.g., migrate <xsl:document> to <xsl:result-document>, etc.).
>
> Here is an approximation of the template that matches the section in
> the example above:
>
> <xsl:template match="section">
> 	<my-proc id="{@id}">
> 		<xsl:element name="proc-title">
> 			<xsl:value-of select="./title"/>
> 		</xsl:element>
> 		<xsl:element name="procbody">
> 			<xsl:element name="prereq">
> 				<xsl:apply-templates select="*[.
> &lt;&lt; procedure[1]]"/>
> 			</xsl:element>
> 			<xsl:apply-templates select="./procedure"/>
> 			<xsl:element name="postreq">
> 				<xsl:apply-templates select="*[.
> &gt;&gt; procedure[1]]"/>
> 			</xsl:element>
> 		</xsl:element>
> 	</my-proc>
> </xsl:template>
>
> I must be making a simple mistake. Any assistance is appreciated.
>
> Best regards,
>
> Paul Anderson
>
>
>
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