!!! Overview 
An AND [LDAP Filter Choice] is intended to serve as a container that holds zero or more other [LDAP SearchFilters].  

In order for an entry to match an AND filter, it must match all of the [LDAP SearchFilters] contained in the AND filter.

AND filters may be represented as a string by enclosing the entire filter in parentheses and placing an ampersand just after the opening parenthesis.  

For [example], a filter of 
{{{
(&(objectClass=person)(uid=john.doe))
}}}
represents an [{$pagename}] that embeds the "(objectClass=person)" and "(uid=john.doe)" equality filters.

[{$pagename}] that does not contain any embedded filters is called an [Absolute True and False Filters].  The string representation for an LDAP true filter is "{{(&)}}", and LDAP true filters will always match any target entry.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]