RE: [xsl] Selecting First Direct Sibling

["Michael Kay" <mike@xxxxxxxxxxxx>]

following-sibling::node()[1][self::comment()]

selects the following sibling node if it is a comment.

If there's a whitespace text node in between the context node and the
comment, following-sibling::node()[1] will be a text node, so nothing will
be selected.

So it's a good idea to get rid of whitespace text nodes using strip-space.

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

> -----Original Message-----
> From: Wasiq Shaikh [mailto:wasiq911@xxxxxxxxxxx] 
> Sent: 20 August 2007 18:35
> To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
> Subject: [xsl] Selecting First Direct Sibling
> 
> Hello,
> 
> I'm having a weird and frustrating problem. I have two XSL 
> files (XPath1.0/Xalan2.7J). Both do the same thing. One 
> (mine) is more robust and has a bit more processing. The 
> other more simplistic and different formatting but with the 
> same goal in mind. That goal is to produce a flat list of 
> elements and its attributes from an XML Schema document.
> 
> The objective here is to get the comment block directly after 
> an element and/or attribute declaration.
> 
> Example:
> 
> <xsd:element name="blah">
> <!-- This is a comment about the element blah -->
>    <xsd:attribute name="someAttribute"/>
>    <xsd:attribute name="blahAttribute"/>
>    <!-- This is a comment about the attribute blahAttribute 
> under element blah --> </xsd:element>
> 
> Let's focus on grabbing the comment block under attributes. 
> In the simplistic XSL tranformation we have this:
> 
> <xs:stylesheet exclude-result-prefixes="xsd"
>    xmlns:xsd="http://www.w3.org/2001/XMLSchema";
>    xmlns:xs="http://www.w3.org/1999/XSL/Transform";
>    version="1.0"
>    xmlns:xalan="http://xml.apache.org/xslt";>
> 
>    <xs:output indent="yes" xalan:indent-amount="3"/>
> 
> <xs:template match="/">
>    <xs:element name="Repository">
>       <xs:element name="Elements">
>          <xs:apply-templates select="/*/*"/>
>       </xs:element>
>    </xs:element>
> </xs:template>
> 
> <xs:template match="xsd:element[@name]">
>    <xs:element name="{@name}">
>       <xs:if test="string(@type)">
>          <xs:attribute name="type">
>             <xs:value-of select="@type"/>
>          </xs:attribute>
>       </xs:if>
>       <xs:for-each select="*[name()='xsd:simpleType' or 
> name()='xsd:complexType']">
>          <xs:apply-templates select="*"/>
>       </xs:for-each>
>    </xs:element>
> </xs:template>
> 
> <xs:template match="xsd:attribute">
>    <xs:element name="attribute">
>       <xs:attribute name="name">
>          <xs:value-of select="@name"/>
>       </xs:attribute>
>       <xs:copy-of 
> select="following-sibling::node()[1][self::comment()]"/>
>    </xs:element>
> </xs:template>
> 
> <xs:template match="xsd:sequence|xsd:choice">
>    <xs:apply-templates select="*"/>
> </xs:template>
> 
> <xs:template match="node()|@*"/>
> 
> </xs:stylesheet>
> 
> This works great. It grabs the comment block directly after 
> an attribute. If it doesn't exist it doesn't process 
> anything. The output will be this:
> 
> <blah>
>    <attribute name="someAttribute"/>
>    <attribute name="blahAttribute"/>
>    <!-- This is a comment about the attribute blahAttribute 
> under element blah --> </blah>
> 
> So, I take this simplistic stylesheet and make it more 
> robust, more descriptive, added a few changes to the format, 
> some more descriptive attributes, process complexTypes and 
> extensions and so forth ... However, the comment grab doesn't work.
> 
> ------
> 
> OHHH ... SOB!!! I figured it out! [40 minutes later] I'll 
> leave the original message I was typing so others will 
> understand the problem.
> 
> Apparently, adding/removing this line
> 
> <xsl:strip-space elements="xsd:complexType"/>
> 
> makes the script work/not work. This doesn't make sense to me 
> .. what does this have to do with processing comments?
> 
> W.S
> 
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