[rules-users] Checking an xml field

Hi, I'm new in drools and I'm having some problems accessing an xml field. I'm using drools with jaxb to treat xml files that follow an specific xsd. I have the following xml (this is just a piece of the xml): <OASIS_TSO_1_0> <EVENT> <EVENT_ID>EVENT_ID_03/10/2008 10:22:36</EVENT_ID> <NODE_ID>00</NODE_ID> <OTHER_EVENT_ID>Incidente UME</OTHER_EVENT_ID> <EVENT_TYPE>POL</EVENT_TYPE> <SOURCE>HUMDED</SOURCE> <SEVERITY>EXTREM</SEVERITY> <CERTAINTY>88</CERTAINTY> <DECL_DATIME>2008-10-03T10:20:47.0000000+02:00</DECL_DATIME> <GEO> <DESCRIPTION/> <POSITION> <LOC_ID>14021</LOC_ID> <COORD> <LAT>37.9811636567434</LAT> <LON>-4.85417587343286</LON> <HEIGHT>0</HEIGHT> </COORD> </POSITION> </GEO> </EVENT> </OASIS_TSO_1_0> I already have a couple of rules working, but they are simple rules, like this one: rule "Rule1" salience 10 when OASISTSO10($e: EVENT) OASISTSO10($e.SEVERITY == "EXTREM") or OASISTSO10($e.SEVERITY == "SEVERE") then action The problem appears when I have to check the LOC_ID field and I don't know how to access to it. I have tried several things but none of them work 1. when OASISTSO10($e: EVENT) OASISTSO10($e.GEO.POSITION.LOCID == "40005") then 2. when OASISTSO10($e: EVENT) OASISTSO10($g: $e.GEO) OASISTSO10($p: $g.POSITION) OASISTSO10($p.LOCID == "40005") Then I have also tried with ($e.GEO.POSITION.DESCRIPTION, just in case the "_" character was the problem. But the same results... I have searched also for examples with xmls but I haven't had luck. Any help would be appreciated. Thanks in advance, Zaloa