The persistent search control is a type of [supportedControl] that may be used for clients to be notified of changes to [entries|LDAP Entry] that match the criteria from the associated [search operation|SearchRequest].

The persistent search control is described in [draft-ietf-ldapext-psearch|https://opends.dev.java.net/public/standards/draft-ietf-ldapext-psearch.txt] and has an OID of 2.16.840.1.113730.3.4.3.  It is defined as follows:

{{{           
PersistentSearch ::= SEQUENCE 
{
    changeTypes INTEGER,
    changesOnly BOOLEAN,
    returnECs BOOLEAN
} 
}}}

[Search result entries|SearchResultEntry] returned as part of this search may optionally include the [entry change notification control|Entry Change Notification Control] to describe the way in which the entry changed.

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