How to determine in an XML node exists in Coldfusion

Question

If I have XML that looks something like this:
<manifest>
    <state ID="20" name="State 2">
        <person>john.black</person>
    </state>
    <state ID="30" name="State 2">
        <person>bill.doe</person>
        <group>Group2</group>
    </state>
</manifest>
Where <group> may or may not exist under <state>, how do I determine if <group> exists when I'm parsing this XML? 
This is the code I'm working with currently:
<cfset szXMLFile = "Manifest.xml">
<cfset XMLDoc = xmlParse(szXMLFile)>
<cfset StateNodes = xmlSearch(XMLDoc,'/manifest/state')>
<cfoutput>
<cfloop from="1" to="#ArrayLen(StateNodes)#" index="i">
    <cfset StateXML = xmlparse(StateNodes[i])>
    <cfloop index="p" from="1" to="#ArrayLen(StateXML.state.person)#">
        <cfoutput>Person: #StateXML.state.person[p].xmltext#</cfoutput><br />
    </cfloop>
    <cfloop index="g" from="1" to="#ArrayLen(StateXML.state.group)#">
        <cfoutput>Person: #StateXML.state.group[g].xmltext#</cfoutput><br />
    </cfloop>
</cfloop>
</cfoutput>
I suppose I could just put <try><catch> blocks around where I'm referencing <group> and if it doesn't exist, I'll just handle it that way - but that seems like such a hack.  Is there a 'real' way to determine if the node actually exists? 
Thanks! 

Answer 1

<cfif structKeyExists(StateXML.state, "group")>
    <cfloop index="g" from="1" to="#ArrayLen(StateXML.state.group)#">
        <cfoutput>Person: #StateXML.state.group[g].xmltext#</cfoutput><br />
    </cfloop>
</cfif>