is:
I have an XML file like this:
<a>
</a>
<b action='change'>
<add>
<c>bla</c>
<d>bla</d>
</add>
<delete>
<c>bla</c>
<d>bla</d>
<delete>
</b>
<e>
</e>
I have to check for each attribute called 'change'
Then look if it has an <add> tag and an <delete> tag
- Compare the sub element of <add> called <c> with the
sub element of <delete> called <c> and see if the
value is equal.
- The same with sub element <d>
I guess the best to do that is to use a for-each to check all the
attributes with the value 'change' (This is not working in my example
below though)
1) How do I use for-each with attributes? Like this?
<xsl:for-each select="//[action='change']">
<xsl:for-each select="//*[(_at_)*='change']"
Note this selects the element that has an attribute whose value is 'change',
it doesn't select the attribute itself.
<xsl:if test=".='add'">
Now you want to test if the context element has a child element called 'add'
<xsl:if test="child::add"> (or you can miss out "child::")
2) How do I compare in the most efficient way the two sub-elements <c>
and <d> against each other?
It's not clear to me whether add/delete always have children called c and d,
or whether you just used these as examples. If the former,
xsl:if test="add/c = delete/c and add/d = delete/d"
A generic comparison is more difficult, and you need to specify the
requirements rather more precisely - for example, is order important?
Michael Kay
http://www.saxonica.com/
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