<listitem>

<para>

An optional base DN, search scope and LDAP filter

to restrict LDAP searches for this attribute type.

</para>

<para>

syntax:

<programlisting>

search_base[?scope?[filter][?search_base?scope?[filter]]*]

</programlisting>

</para>

<para>

The scope can be one of "base", "onelevel" or

"subtree". The filter must be a valid LDAP search

filter as specified by

http://www.ietf.org/rfc/rfc2254.txt

</para>

<para>

For examples of this syntax, please refer to the

<quote>ldap_search_base</quote> examples section.

</para>

<para>

Default: the value of

<emphasis>ldap_search_base</emphasis>

</para>

</listitem>