LDAP_MATCHING_RULE_BIT_OR (1.2.840.113556.1.4.804) is an ExtensibleMatch for a Bitwise OR operations

LDAP_MATCHING_RULE_BIT_OR returns only when match is found if any bits from the Attribute Value match the Assertion Value. This rule is equivalent to a Bitwise OR Bitwise operation.[1]

We show examples of this Extensible Match usage under Filtering for Bit Fields

Not all LDAP server vendors provide complete matching rules. The OID's shown here are Microsoft Active Directory specific and will probably not work on other server implementations. We wish some of the other LDAP server vendors would add support for these Extensible Match Rules.

More Information#

There might be more information for this subject on one of the following:
[#1] - We obtained some of this information from http://msdn.microsoft.com/en-us/library/aa746475%28VS.85%29.aspx