as I said in my original reply I don't think you can do this with a pure
xslt 1 expression, you could in xslt2 or you need to use an xslt costruct:
<SCHED>
<Schedule>
<Day id="1">
<Squad id="1">
<event id="1" timebeg="1350" timeend="1500"/>
<event id="1" timebeg="1100" timeend="1400"/>
<event id="1" timebeg="900" timend="960"/>
<event id="2" timebeg="960" timend="1020"/>
<event id="3" timebeg="1020" timend="1080"/>
<event id="4" timebeg="1080" timend="1140"/>
</Squad>
<Squad id="3">
<event id="4" timebeg="900" timend="960"/>
<event id="2" timebeg="960" timend="1020"/>
<event id="3" timebeg="1020" timend="1080"/>
<event id="1" timebeg="1080" timend="1140"/>
<event id="1" timebeg="1081" timend="1141"/>
</Squad>
<Squad id="7">
<event id="2" timebeg="900" timend="960"/>
<event id="3" timebeg="960" timend="1020"/>
<event id="4" timebeg="1020" timend="1080"/>
<event id="1" timebeg="1080" timend="1140"/>
</Squad>
</Day>
<Day id="2"/>
<Day id="3"/>
<Day id="4"/>
<Day id="5"/>
<Day id="6"/>
</Schedule>
<Squads>
<Squad timebeg="900" timeend="1140" id="1" group="1" name="Level
8,9,10" description="Girls Optionals Level 8,9,10">
<Days>
<Day id="1"/>
<Day id="3"/>
<Day id="5"/>
</Days>
</Squad>
<Squad timebeg="900" timeend="1140" id="3" group="1" name="Level 7"
description="Girls Optional Levels 7">
<Days>
<Day id="1"/>
<Day id="3"/>
<Day id="5"/>
</Days>
</Squad>
<Squad timebeg="900" timeend="1140" id="3" group="2" name="Level 6"
description="Girls Compulsory Team Level 6">
<Days>
<Day id="1"/>
<Day id="3"/>
<Day id="5"/>
</Days>
</Squad>
</Squads>
<groups>
<group id="1" name="Optional Team" description="Girls Optional Team"/>
</groups>
<events>
<event id="1" name="Bars" description="Women's Uneven Bars"
location="1"/>
</events>
<locations>
<location id="1" map="C4" description="Girls Comp Bar Area"/>
</locations>
<Days>
<Day id="1">Monday</Day>
<Day id="2">Tuesday</Day>
<Day id="3">Wednesday</Day>
<Day id="4">Thursday</Day>
<Day id="5">Friday</Day>
<Day id="6">Saturday</Day>
<Day id="7">Sunday</Day>
</Days>
</SCHED>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output indent="yes"/>
<xsl:template match="/">
equal:
<xsl:copy-of select="/SCHED/Schedule/Day/Squad/event[(_at_)id='2']
[(_at_)timebeg = ../preceding-sibling::Squad/event[(_at_)id='2']/@timebeg]
"/>
overlap:
<xsl:for-each select="/SCHED/Schedule/Day/Squad/event[(_at_)id='1']">
<xsl:if
test="../../Squad/event[(_at_)id='1'][generate-id()!=generate-id(current())]
[(_at_)timebeg <= current()/@timebeg and @timeend >= current()/@timebeg]">
<xsl:copy-of select="."/>
</xsl:if>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
$ saxon squad.xml squad.xsl
<?xml version="1.0" encoding="utf-8"?>
equal:
<event id="2" timebeg="960" timend="1020"/>
overlap:
<event id="1" timebeg="1350" timeend="1500"/>
David
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