On 25/06/18 19:52, Mark Anderson mark(_dot_)anderson(_at_)sg360(_dot_)com wrote:
I'm restricted to XSLT1.0 with no extensions.
Are you allowed to use other computer utilities?
I need to get a list of distinct attributes across a set of nodes.
I think there is a terminological problem here, because I'm not clear
what you mean by "distinct attributes".
From the simplified XML below, the result should be 1,2,3,5 for the
first post_press_version (25) and 1,2,3,6 for the second (26)
By deduction, what I *think* you mean is "the number attribute of hopper
elements which have content in either sequence". The simple answer is a
direct query:
$ lxprintf -e
'hopper[ancestor::post_press_version/post_press_version_id="25"][.!=""]'
"%s\n" @number test.xml | sort | uniq
1
2
3
5
$ lxprintf -e
'hopper[ancestor::post_press_version/post_press_version_id="26"][.!=""]'
"%s\n" @number test.xml | sort | uniq
1
2
3
6
The lxprintf utility uses XPath 1.0; the above solution relies on the
standard (UNIX and GNU/Linux) sort and uniq utilities which may not be
acceptable if you are required to implement the solution *entirely*
within an XSLT 1.0 script. If that is the case, then you were very close
to an answer:
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
version="2.0">
<xsl:output method="text"/>
<xsl:key name="hoppers" match="hopper"
use="concat(ancestor::post_press_version/
post_press_version_id,'/',@number)"/>
<xsl:template match="/">
<xsl:apply-templates select="order/post_press_version"/>
</xsl:template>
<xsl:template match="post_press_version">
<xsl:variable name="vid" select="post_press_version_id"/>
<xsl:value-of select="$vid"/>
<xsl:for-each
select="hopper_allocations/descendant::hopper
[count(.|key('hoppers',concat($vid,'/',@number))[1])=1]">
<xsl:sort select="@number"/>
<xsl:if test="key('hoppers',concat($vid,'/',@number))[.!='']">
<xsl:text>,</xsl:text>
<xsl:value-of select="@number"/>
</xsl:if>
</xsl:for-each>
<xsl:text>
</xsl:text>
</xsl:template>
</xsl:stylesheet>
///Peter
--
Peter Flynn | Principal Consultant | Silmaril Consultants | Cork 🇮🇪
Ireland | ☎ +353 86 824 5333 | ✉ peter(_at_)silmaril(_dot_)ie | 🌍
blogs.silmaril.ie/peter
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