RegexSplit syntaxing

[Goggins, Patrick]

I'm running into an issue with the RegexSplit type, it's a pretty simple return the last 9 digits scenario.

The below works and outputs an integer longer than 9 digits

	<resolver:AttributeDefinition xsi:type="ad:Simple" id="CampusID" sourceAttributeID="employeeNumber">
        <resolver:Dependency ref="myLDAP" />
        <resolver:AttributeEncoder xsi:type="enc:SAML2String" name="urn:oid:1.2.840.113556.1.2.610" friendlyName="CampusID" />
	</resolver:AttributeDefinition>

The below is returning no values

	<resolver:AttributeDefinition xsi:type="RegexSplit" xmlns="urn:mace:shibboleth:2.0:resolver:ad" id="CampusID" sourceAttributeID="employeeNumber" regex="\d{9}\b">
		<resolver:Dependency ref="myLDAP" />
		<resolver:AttributeEncoder xsi:type="enc:SAML2String" name="urn:oid:1.2.840.113556.1.2.610" friendlyName="CampusID" />
	</resolver:AttributeDefinition>

Ideas?

Thanks,

~Patrick