If I simply write:
<xsl:value-of select=".../aaa"/>
<xsl:value-of select=".../bbb"/>
<xsl:value-of select=".../ccc"/>
From your description, it sounds as if you actually wrote:
<aaa><xsl:value-of select=".../aaa"/></aaa>
<bbb><xsl:value-of select=".../bbb"/></bbb>
<ccc><xsl:value-of select=".../ccc"/></ccc>
Or something like it (judging from the "...")
If it's simple enough, you can simply do
<xsl:copy-of select="aaa|bbb|ccc"/>
But I don't think you've told us the whole truth, so it might have to be
something like
<xsl:if test="...aaa">
<aaa>
<xsl:value-of ...
</aaa>
</xsl:if>
etc.
Regards,
Michael Kay
http://www.saxonica.com/
http://twitter.com/michaelhkay
-----Original Message-----
From: Ben Stover [mailto:bxstover(_at_)yahoo(_dot_)co(_dot_)uk]
Sent: 07 October 2009 13:10
To: xsl-list(_at_)lists(_dot_)mulberrytech(_dot_)com
Subject: [xsl] How to copy only the really existing <choice>
branch/element? "value-of-if-exist"
Assume I have a XML source based on the following
(simplified) XSD schema:
<xsd:element name="top" type="mytype"/>
<xsd:complexType name="mytype">
<xsd:choice>
<xsd:element name="aaa" type=".....">
<xsd:element name="bbb" type=".....">
<xsd:element name="ccc" type=".....">
</xsd:choice>
</xsd:complexType>
That mean either element aaa or element bbb or element ccc is
filled/exists.
Now I want to copy only this sub-element to a target which
currently exists.
If I simply write:
<xsl:value-of select=".../aaa"/>
<xsl:value-of select=".../bbb"/>
<xsl:value-of select=".../ccc"/>
then ALL three elements were copied. The 2 branches which do
not exist were created as empty elements so that the target
XML doc looks like e.g.
<top>
<aaa></aaa>
<bbb>myvalue</bbb>
<ccc></ccc>
</top>
which is an invalid XML because of its XSD schema file definition.
The question is now: How can I let XSL copy only this
branch/element which really exists?
I need a function like
<xsl:value-of-only-the-existing-choice-branch select=..../top"/>
or
<xsl:value-of-if-exists select=".../aaa"/>
<xsl:value-of-if-exists select=".../bbb"/>
<xsl:value-of-if-exists select=".../ccc"/>
How can I do this in detail?
Thank you
Ben
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