188.8.131.52.4.1.4184.108.40.206 is the OID
for the "Return all operational Attributes
" ("+") as used in LDAP SearchFilters
LDAP Server Implementations supporting this feature SHOULD publish the Object Identifier 220.127.116.11.4.1.418.104.22.168 as a value of the 'supportedFeatures' RFC 3674 attribute in the root DSE.
There might be more information for this subject on one of the following: