Is there a way in the routing rule to compare two fields in two different segments? For example, for the message below we need to compare one Identifier in PID-3 (uiytr5678906^^^^CKS)against another in MRG-1 (uiytr5678A06^^^^CKS). Both will always have the same IdentifierTypeCode (PID-3.5/MRG-1.5), but the ID number can be different. Just to clarify, we only want to compare the CKS IdentifierID, not the entire field or all the identifiers in the MRG-1 or PID-3 field. MSH|^~\&|EPIC_CSN||||20171220124600|858406|ADT^A40|42450|T|2.3|||||||||| EVN|A40|20171220124600||PATIENT_MERGE|85406^SMITH^ALLISON^M^^^^^BH^^^^^ROH| PID|1||9A04914^^^^BHSMRN~3104790^^^EPIC^MR~001004790^^^FH^FHMRN~uiytr5678906^^^^CKS||JONES^LIA^M||19821220|F|MRORO^LIA^^||^^^^^US^||||||||000-00-0000|||||||||||N| PD1|||OAK HOSPITAL^^105|600080^ANGELES^DAISY^S^^^^^^^^^103~1073512752^ANGELES^DAISY^S^^^^^^^^^104~600080^ANGELES^DAISY^S^^^^^^^^^106||2||||||||||| MRG|9A04914^^^^BHSMRN~3104790^^^EPIC^MR~001004790^^^FH^FHMRN~uiytr5678A06^^^^CKS|||