• Use ldapsearch tool to view a multi-valued operational attribute, objectClasses, which publishes the object class definitions on the Directory Server. The attribute is stored in the subschema subentry.
    $ bin/ldapsearch --baseDN cn=schema --searchScope base \ 
    --dontWrap "(objectclass=*)" objectClasses
    dn: cn=schema
    objectClasses: ( 2.5.6.0 NAME 'top' ABSTRACT MUST objectClass X-ORIGIN 'RFC 4512' )
    objectClasses: ( 2.5.6.1 NAME 'alias' SUP top STRUCTURAL MUST aliasedObjectName 
      X-ORIGIN 'RFC 4512' )
    objectClasses: ( 2.5.6.2 NAME 'country' SUP top STRUCTURAL MUST c 
      MAY ( searchGuide $ description ) X-ORIGIN 'RFC 4519' )
    ...(more output)...