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Problem with xsl:sequence and xsl:variable
Added by Anonymous almost 15 years ago
Legacy ID: #7399877
Legacy Poster: Lea Hayes (numberkruncher)
Hi, I am using xsl:sequence to return a value from a function. This value gets put
into a variable. I have noticed that the content inside the variable is acting as a new
temporary document because calling "generate-id" on the element in the
variable differs from the source document. Here is a test which I put together:
<xsl:variable name="a1"
select="saxon:evaluate(concat('doc(''',$href-path,''')//intro'))"/>
<xsl:variable name="b1"
select="saxon:evaluate(concat('doc(''',$href-path,''')//intro'))"/>
<xsl:variable name="c1"
select="doc($href-path)//intro"/> <xsl:variable
name="d1" select="doc($href-path)//intro"/>
<xsl:variable name="a2"> <xsl:sequence
select="saxon:evaluate(concat('doc(''',$href-path,''')//intro'))"/>
</xsl:variable> <xsl:variable name="b2">
<xsl:sequence
select="saxon:evaluate(concat('doc(''',$href-path,''')//intro'))"/>
</xsl:variable> <xsl:variable name="c2">
<xsl:sequence select="doc($href-path)//intro"/>
</xsl:variable> <xsl:variable name="d2">
<xsl:sequence select="doc($href-path)//intro"/>
</xsl:variable> a1: <xsl:value-of
select="generate-id($a1)"/><br/> b1:
<xsl:value-of
select="generate-id($b1)"/><br/> c1:
<xsl:value-of
select="generate-id($c1)"/><br/> d1:
<xsl:value-of
select="generate-id($d1)"/><br/> a2:
<xsl:value-of
select="generate-id($a2)"/><br/> b2:
<xsl:value-of
select="generate-id($b2)"/><br/> c2:
<xsl:value-of
select="generate-id($c2)"/><br/> d2:
<xsl:value-of select="generate-id($d2)"/> The output of
this test is: a1: d5e53 b1: d5e53 c1: d5e53 d1: d5e53 a2: d16 b2: d17 c2: d18 d2: d19 I
have two concerns with this problem: - Generated identifiers do not match, a pretty
serious bug in my output. - Excessive duplication of content. Why are the variables
which use xsl:sequence different? Is there a way in which I can work around this
problem? I was under the impression that xsl:sequence returned the original nodes unless
combined with other content, in which case it is the same as xsl:copy-of. Many thanks,
Lea Hayes
Legacy ID: #7400407
Legacy Poster: Michael Kay (mhkay)
General XSLT coding questions (as distinct from Saxon product-specific questions)
are best asked on the xsl-list at mulberrytech.com. An xsl:variable with no select or as
attribute always creates a new temporary document. If you just want to select an
existing node, then instead of this: <xsl:variable
name="a2"> <xsl:sequence
select="EXPR"/> </xsl:variable> do this:
<xsl:variable name="a2"
select="EXPR"/> You could also solve the problem by adding
as="node()*" to the xsl:variable.
Legacy ID: #7401115
Legacy Poster: Lea Hayes (numberkruncher)
That has solved my problem. Thanks Michael!
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