diff --git a/library/sbcap/SBC_AP_CommonDataTypes.asn b/library/sbcap/SBC_AP_CommonDataTypes.asn
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+++ b/library/sbcap/SBC_AP_CommonDataTypes.asn
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+-- SBC-AP-CommonDataTypes.asn
+--
+-- Taken from 3GPP TS 29.168 V15.1.0 (2018-09)
+-- http://www.3gpp.org/ftp/Specs/archive/29_series/29.168/29168-930.zip
+--
+-- 4.4.6	Common Definitions
+--
+
+-- **************************************************************
+--
+-- Common definitions
+--
+-- **************************************************************
+
+SBC-AP-CommonDataTypes {
+itu-t (0) identified-organization (4) etsi (0) mobileDomain (0) 
+eps-Access (21) modules (3) sbc-AP (3) version1 (1) sbc-AP-CommonDataTypes (3)}
+
+DEFINITIONS AUTOMATIC TAGS ::= 
+
+BEGIN
+
+Criticality	::= ENUMERATED { reject, ignore, notify }
+
+Presence	::= ENUMERATED { optional, conditional, mandatory }
+
+ProcedureCode	::= INTEGER (0..255)
+
+ProtocolExtensionID	::= INTEGER (0..65535)
+
+ProtocolIE-ID	::= INTEGER (0..65535)
+
+TriggeringMessage	::= ENUMERATED {initiating-message, successful-outcome, unsuccessful-outcome, outcome}
+
+END