New matching rules require additional server code extensions to be implemented on the PingDirectory Server. If you need new matching rules, contact your authorized support provider for assistance.

The formal specification for attribute types is provided in RFC 4512, section 4.1.3 as follows:
MatchingRuleDescription = "(" wsp    ; Left parentheses followed by a white space
numericoid                           ; Required numeric object identifier identifying 
                                     ;   this matching rule
[ sp "NAME" sp qdescrs	              ; Short name descriptor
[ sp "DESC" sp qdstring              ; Description
[ sp "OBSOLETE" ]                    ; Specifies if the rule is inactive
sp "SYNTAX" sp numericoid            ; Assertion syntax
extensions wsp ")"	                  ; Extensions followed by a white space and ")"