I am about to smash all the windows!

I have repeatedly, over and over, failed to extract the volume component
of this structured attribute into a local variable

<nds dtdversion="4.0" ndsversion="8.x">
<source>
<product edition="Advanced" version="4.0.2.6">DirXML</product>
<contact>Novell, Inc.</contact>
</source>
<output>
<instance class-name="Group" qualified-src-dn="O=dk\OU=structures
\OU=depts\CN=SFO Tossen" src-dn="\FMKMETA\dk\structures\depts\SFO Tossen"
src-entry-id="54971">
<association state="associated">UuKzNrndcUHzqFLisza53Q==</
association>
<attr attr-name="XATTRIBCustNos">
<value timestamp="1439908160#2" type="structured">
<component name="nameSpace">0</component>
<component name="volume">\FMKMETA\dk\dataitems\custno\TEL\400
986 999-5798006831012</component>
<component name="path">TEL</component>
</value>
</attr>
</instance>
<status level="success"></status>
</output>
</nds>


I just want to set local variable MYVAR = the "volume" value

Please help !