The LDAP repository supports most of the standard set of repository queries. See the Unsupported Queries in the LDAP Repository topic of this section for a list of exceptions. You can use targeting rules and services (described in the Creating Rules for Targeting Content and Setting Up Targeting Services chapters of the ATG Personalization Programming Guide) to query the LDAP repository. The LDAP query builder builds up an LDAP search filter string (as described in RFC 2254), which is used by the view to execute a series of searches (one for each search root) on the LDAP directory.