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RE: [xsl] Collapsing run-on tag chains not working in saxon or xalan

From: "Michael Kay" <mike@------------>
To:
Date: 11/1/2004 8:57:00 PM
> With the following xml and xsl, the Microsoft msxmldom 4 is producing
> the expected output, but xalan 2.4, 2.6, and saxon 6.5.3 are not: they
> all produce
> the same, unexpected output.

Without reading further, this is almost certainly because Microsoft
(incorrectly, or at least stretching what the spec allows) strips whitespace
text nodes from the document by default.
> 
> The purpose of this code is to collapse run-on chains like
> <ilink>foo</link><link id="1234">bar</link> into a single tag
> <link>foo bar<id id="1234"/>
> </ilink>. The xsl will also collapse run-on chains of b, i, sup, sub,
> and similar tags.

But in your input, the elements aren't adjacent to each other - they have
whitespace in between.

Michael Kay
http://www.saxonica.com


> 
> Can anyone explain to me whether xalan and saxon just have a bug, and
> preferably how to get xalan and/or saxon to transform the way msxml4
> does here
> (which I believe is correct)?
> 
> TMIA,
> Richard Bondi
> 
> 
> Sample input:
> 
> <Chapter>
> 	<ChapterTitle>The chapter title must be immediately 
> followed by a
> section title</ChapterTitle>
> 	<Body>
> 		<SectionTitle>The section title</SectionTitle>
> 		<Title>Internal Links: _ilink</Title>
> 		<Paragraph>The internal link to Proteins and 
> Membranes, optionally
> including the cont_id would look like: <ilink id="1234">Proteins and
> 		Membranes</ilink>. You could also just type 
> <ilink>Proteins and
> Membranes</ilink>. Another option is <ilink>CBIO|Proteins and
> Membranes</ilink>, or
> 		even just <ilink id="1234"/>. You can also do <ilink
> id="1234">CBIO|Proteins and Membranes</ilink>. Spaces on either side
> of a pipe (|) are
> 		optional.</Paragraph>
> 		<Paragraph>Feel free to include crazy 
> formatting, as in <ilink>CBIO|</ilink>
> 			<ilink>
> 				<i>Proteins</i>
> 			</ilink>
> 			<ilink> and Membranes</ilink> or <ilink>
> 				<b>
> 					<i>Pr</i>
> 				</b>
> 			</ilink>
> 			<ilink>
> 				<sup>
> 					<b>
> 						<i>o</i>
> 					</b>
> 				</sup>
> 			</ilink>
> 			<ilink>
> 				<sub>
> 					<b>
> 						<i>t</i>
> 					</b>
> 				</sub>
> 			</ilink>
> 			<ilink>
> 				<b>
> 					<i>ei</i>
> 				</b>
> 			</ilink>
> 			<ilink>
> 				<b>
> 					<i>
> 						<u>n</u>
> 					</i>
> 				</b>
> 			</ilink>
> 			<ilink>
> 				<b>
> 					<i>s</i>
> 				</b>
> 			</ilink>
> 			<ilink id="1234">and Membranes</ilink>. 
> </Paragraph>
> 	</Body>
> </Chapter>
> 
> 
> Xsl:
> 
> <xsl:stylesheet version="1.0" 
> xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
> 	<xsl:output encoding="ISO-8859-1"/>
> 	<xsl:template match="/">
> 		<xsl:apply-templates/>
> 	</xsl:template>
> 	<!-- run of ilinks -->
> 	<xsl:template match="ilink">
> 		<xsl:if 
> test="not(local-name(preceding-sibling::node()[1])='ilink')">
> 			<ilink>
> 				<xsl:if 
> test="not(name(following-sibling::node()[1])='ilink')"><xsl:copy-of
> select="@*"/></xsl:if>
> 				<xsl:apply-templates/>
> 				<xsl:if 
> test="name(following-sibling::node()[1])='ilink'"><xsl:apply-templates
> select="following-sibling::node()[1]" mode="following"/></xsl:if>
> 			</ilink>
> 		</xsl:if>
> 	</xsl:template>
> 	<xsl:template match="ilink" mode="following" >
> 		<xsl:apply-templates/>
> 		<xsl:if 
> test="not(name(following-sibling::node()[1])='ilink') and
> @*"><id><xsl:copy-of select="@*"/></id></xsl:if>
> 		<xsl:if 
> test="name(following-sibling::node()[1])='ilink'"><xsl:apply-templates
> select="following-sibling::node()[1]" mode="following"/></xsl:if>
> 	</xsl:template>
> 	<!-- run of formatting tags, eg tags without attributes -->
> 	<xsl:template match="b | i | sup | sub | u | smallcaps 
> | red" priority="2">
> 		<xsl:variable name="ename" select="name(.)"/>
> 		<xsl:if 
> test="not(local-name(preceding-sibling::node()[1])=string($ename))">
> 			<xsl:element name="{$ename}">
> 				<xsl:apply-templates/>
> 				<xsl:if 
> test="name(following-sibling::node()[1])=string($ename)"><xsl:
> apply-templates
> select="following-sibling::node()[1]" mode="following"/>
> 				</xsl:if>
> 			</xsl:element>
> 		</xsl:if>
> 	</xsl:template>
> 	<xsl:template match="b | i | sup | sub | u | smallcaps | red"
> mode="following" >
> 		<xsl:variable name="ename" select="name(.)"/>
> 		<xsl:apply-templates/>
> 		<xsl:if 
> test="name(following-sibling::node()[1])=string($ename)"><xsl:
> apply-templates
> select="following-sibling::node()[1]" mode="following"/>
> 		</xsl:if>
> 	</xsl:template>
> 	<xsl:template match="@* | node()">
> 		<xsl:copy >
> 			<xsl:apply-templates select="@*" />
> 			<xsl:apply-templates />
> 		</xsl:copy>
> 	</xsl:template>
> </xsl:stylesheet>
> 
> 
> Output using msxml4 (correct output, IMHO):
> 
> <Chapter>
> 	<ChapterTitle>The chapter title must be immediately 
> followed by a
> section title</ChapterTitle>
> 	<Body>
> 		<SectionTitle>The section title</SectionTitle>
> 		<Title>Internal Links: _ilink</Title>
> 		<Paragraph>The internal link to Proteins and 
> Membranes, optionally
> including the cont_id would look like: <ilink id="1234">Proteins and
> 		Membranes</ilink>. You could also just type 
> <ilink>Proteins and
> Membranes</ilink>. Another option is <ilink>CBIO|Proteins and
> Membranes</ilink>, or
> 		even just <ilink id="1234"/>. You can also do <ilink
> id="1234">CBIO|Proteins and Membranes</ilink>. Spaces on either side
> of a pipe (|) are
> 		optional.</Paragraph>
> 		<Paragraph>Feel free to include crazy formatting, as in
> <ilink>CBIO|<i>Proteins</i> and Membranes</ilink> or <ilink>
> 				<b>
> 					<i>Pr</i>
> 				</b>
> 				<sup>
> 					<b>
> 						<i>o</i>
> 					</b>
> 				</sup>
> 				<sub>
> 					<b>
> 						<i>t</i>
> 					</b>
> 				</sub>
> 				<b>
> 					<i>ei</i>
> 				</b>
> 				<b>
> 					<i>
> 						<u>n</u>
> 					</i>
> 				</b>
> 				<b>
> 					<i>s</i>
> 				</b>and Membranes<id id="1234"/>
> 			</ilink>. </Paragraph>
> 	</Body>
> </Chapter>
> 
> 
> Output of xalan 2.4, 2.6.0, and instant saxon 6.5.3 (appears to do
> nothing, actually):
> 
> <Chapter>
> 	<ChapterTitle>The chapter title must be immediately 
> followed by a
> section title</ChapterTitle>
> 	<Body>
> 		<SectionTitle>The section title</SectionTitle>
> 		<Title>Internal Links: _ilink</Title>
> 		<Paragraph>The internal link to Proteins and 
> Membranes, optionally
> including the cont_id would look like: <ilink id="1234">Proteins and
> 		Membranes</ilink>. You could also just type 
> <ilink>Proteins and
> Membranes</ilink>. Another option is <ilink>CBIO|Proteins and
> Membranes</ilink>, or
> 		even just <ilink id="1234"/>. You can also do <ilink
> id="1234">CBIO|Proteins and Membranes</ilink>. Spaces on either side
> of a pipe (|) are
> 		optional.</Paragraph>
> 		<Paragraph>Feel free to include crazy 
> formatting, as in <ilink>CBIO|</ilink>
> 			<ilink>
> 				<i>Proteins</i>
> 			</ilink>
> 			<ilink> and Membranes</ilink> or <ilink>
> 				<b>
> 					<i>Pr</i>
> 				</b>
> 			</ilink>
> 			<ilink>
> 				<sup>
> 					<b>
> 						<i>o</i>
> 					</b>
> 				</sup>
> 			</ilink>
> 			<ilink>
> 				<sub>
> 					<b>
> 						<i>t</i>
> 					</b>
> 				</sub>
> 			</ilink>
> 			<ilink>
> 				<b>
> 					<i>ei</i>
> 				</b>
> 			</ilink>
> 			<ilink>
> 				<b>
> 					<i>
> 						<u>n</u>
> 					</i>
> 				</b>
> 			</ilink>
> 			<ilink>
> 				<b>
> 					<i>s</i>
> 				</b>
> 			</ilink>
> 			<ilink id="1234">and Membranes</ilink>. 
> </Paragraph>
> 	</Body>
> </Chapter>


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