OpenLDAP is an open source suite of LDAP (Lightweight Directory Access
Protocol) applications and development tools. The suite includes a
stand-alone LDAP server (slapd) which is in the -servers package, libraries for
implementing the LDAP protocol (in the lib packages), and utilities, tools, and
sample clients (in the -clients package). The openldap binary package includes
only configuration files used by the libraries.

Install openldap if you need LDAP applications and tools.