Input file is :
<IPBZs>
<IPBZ>
<TRAKOD>IPBZ</TRAKOD>
<TRAYMD>20151002</TRAYMD>
<TRATYD>10573143</TRATYD>
<MODIDE>N</MODIDE>
<CMPNUM>0999900</CMPNUMSRV>
<VLDACTSRT>F</VLDACTSRT>
<TALKODISO>EN</TALKODISO>
<CMPOMS>TEST ANALYSE GCPS 1</CMPOMS>
<CHSNUM>0E777777</CHSNUM>
</IPBZ>
<IPBZ>
<TRAKOD>IPBZ</TRAKOD>
<TRAYMD>20151002</TRAYMD>
<TRATYD>10573143</TRATYD>
<MODIDE>N</MODIDE>
<CMPNUM>0999900</CMPNUMSRV>
<VLDACTSRT>F</VLDACTSRT>
<TALKODISO>EN</TALKODISO>
<CMPOMS>TEST ANALYSE GCPS 1</CMPOMS>
<CHSNUM>0E777778</CHSNUM>
</IPBZ>
<IPBZ>
<TRAKOD>IPBZ</TRAKOD>
<TRAYMD>20151002</TRAYMD>
<TRATYD>10573143</TRATYD>
<MODIDE>N</MODIDE>
<CMPNUM>0999900</CMPNUMSRV>
<VLDACTSRT>F</VLDACTSRT>
<TALKODISO>EN</TALKODISO>
<CMPOMS>TEST ANALYSE GCPS 1</CMPOMS>
<CHSNUM>0E777779</CHSNUM>
</IPBZ>
</IPBZs>

The required output is :

<ns0:FieldActionIssued ID="0999900">
<ns1:ApplicableTo chassisNr="0E777777">
<ns1:ExecutionStatus>Not executed</ns1:ExecutionStatus>
</ns1:ApplicableTo>
<ns1:ApplicableTo chassisNr="0E777778">
<ns1:ExecutionStatus>Not executed</ns1:ExecutionStatus>
</ns1:ApplicableTo>
<ns1:ApplicableTo chassisNr="0E777779">
<ns1:ExecutionStatus>Not executed</ns1:ExecutionStatus>
</ns1:ApplicableTo>
</ns0:FieldActionIssued>

The input CMPNUM value should come in ID attribute in output. How can I achive this?

Please show the code you have so far, so we can tell you how to fix it.

__________________
Michael Kay
http://www.saxonica.com/
Author, XSLT 2.0 and XPath 2.0 Programmer\'s Reference