diff --git a/asn1/sabp/SABP-CommonDataTypes.asn b/asn1/sabp/SABP-CommonDataTypes.asn
new file mode 100644
index 0000000..92f3e12
--- /dev/null
+++ b/asn1/sabp/SABP-CommonDataTypes.asn
@@ -0,0 +1,16 @@
+--
+-- Common definitions
+--
+-- **************************************************************
+SABP-CommonDataTypes {
+itu-t (0) identified-organization (4) etsi (0) mobileDomain (0)
+umts-Access (20) modules (3) sabp (3) version1 (1) sabp-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