RFC 1558 (rfc1558) - Page 1 of 3

A String Representation of LDAP Search Filters

Alternative Format: Original Text Document
Network Working Group                                           T. Howes
Request for Comments: 1558                        University of Michigan
Category: Informational                                    December 1993


             A String Representation of LDAP Search Filters

Status of this Memo

   This memo provides information for the Internet community.  This memo
   does not specify an Internet standard of any kind.  Distribution of
   this memo is unlimited.

Abstract

   The Lightweight Directory Access Protocol (LDAP) [1] defines a
   network representation of a search filter transmitted to an LDAP
   server.  Some applications may find it useful to have a common way of
   representing these search filters in a human-readable form.  This
   document defines a human-readable string format for representing LDAP
   search filters.

1.  LDAP Search Filter Definition

   An LDAP search filter is defined in [1] as follows:

     Filter ::= CHOICE {
             and                [0] SET OF Filter,
             or                 [1] SET OF Filter,
             not                [2] Filter,
             equalityMatch      [3] AttributeValueAssertion,
             substrings         [4] SubstringFilter,
             greaterOrEqual     [5] AttributeValueAssertion,
             lessOrEqual        [6] AttributeValueAssertion,
             present            [7] AttributeType,
             approxMatch        [8] AttributeValueAssertion
     }

     SubstringFilter ::= SEQUENCE {
             type    AttributeType,
             SEQUENCE OF CHOICE {
                     initial        [0] LDAPString,
                     any            [1] LDAPString,
                     final          [2] LDAPString
             }
     }





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