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           The  dynlist overlay to slapd(8) allows expansion of dynamic groups and
           more.  Any time an entry with a specific objectClass  (defined  in  the
           overlay  configuration)  is  being returned, the LDAP URI-valued occur-
           rences of a specific attribute (also defined in the overlay  configura-
           tion)  are  expanded  into the corresponding entries, and the values of
           the attributes listed in the URI are added to the original  entry.   No
           recursion is allowed, to avoid potential infinite loops.
           Since the resulting entry is dynamically constructed, it does not exist
           until it is constructed while being returned.  As a consequence, dynam-
           ically added attributes do not participate in the filter matching phase
           of the search request handling.  In other words, filtering for  dynami-
           cally added attributes always fails.
           The  resulting  entry  must  comply  with  the LDAP data model, so con-
           straints are enforced.  For example, if  a  SINGLE-VALUE  attribute  is
           listed, only the first value found during the list expansion appears in
           the final entry.  The above described behavior  is  disabled  when  the
           manageDSAit  control (RFC 3296) is used.  In that case, the contents of
           the dynamic group entry is returned;  namely,  the  URLs  are  returned
           instead of being expanded.


           The  config directives that are specific to the dynlist overlay must be
           prefixed by dynlist-, to avoid potential conflicts with directives spe-
           cific to the underlying database or to other stacked overlays.
           overlay dynlist
                  This directive adds the dynlist overlay to the current database,
                  or to the frontend, if used before any  database  instantiation;
                  see slapd.conf(5) for details.
           This  slapd.conf  configuration option is defined for the dynlist over-
           lay. It may have multiple occurrences, and it  must  appear  after  the
           overlay directive.
           dynlist-attrset  <group-oc> [<URI>] <URL-ad> [[<mapped-ad>:]<member-ad>
                  The  value group-oc is the name of the objectClass that triggers
                  the dynamic expansion of the data.
                  The optional URI restricts expansion only  to  entries  matching
                  the DN, the scope and the filter portions of the URI.
                  The  value  URL-ad  is the name of the attributeDescription that
                  entries with group-oc objectClass apply as  if  the  DN  of  the
                  entries  resulting from the expansion of the URI were present in
                  the group-oc entry as values of the member-ad attribute.
                  Alternatively,  mapped-ad  can  be  used  to  remap   attributes
                  obtained through expansion.  member-ad attributes are not filled
                  by expanded DN, but are remapped as mapped-ad attributes.   Mul-
                  tiple mapping statements can be used.
           The  dynlist  overlay  may  be  used with any backend, but it is mainly
           intended for use with local storage backends.  In case the  URI  expan-
           sion is very resource-intensive and occurs frequently with well-defined
           patterns, one should consider adding a proxycache later on in the over-
           lay stack.


           By  default the expansions are performed using the identity of the cur-
           rent LDAP user.  This identity may be overridden by setting the dgIden-
           tity attribute in the group's entry to the DN of another LDAP user.  In
           that case the dgIdentity will be used when expanding the  URIs  in  the
           object.   Setting the dgIdentity to a zero-length string will cause the
           expansions to be  performed  anonymously.   Note  that  the  dgIdentity
           attribute  is  defined  in the dyngroup schema, and this schema must be
           loaded before the dgIdentity authorization feature may be used.  If the
           dgAuthz  attribute is also present in the group's entry, its values are
           used to determine what identities are authorized to use the  dgIdentity
           to  expand  the group.  Values of the dgAuthz attribute must conform to
           the (experimental) OpenLDAP authz syntax.


           This example collects all the email addresses of a database into a sin-
           gle  entry; first of all, make sure that slapd.conf contains the direc-
               include /path/to/dyngroup.schema
               # ...
               database <database>
               # ...
               overlay dynlist
               dynlist-attrset groupOfURLs memberURL
           and that slapd loads, if compiled as a run-time module; then
           add to the database an entry like
               dn: cn=Dynamic List,ou=Groups,dc=example,dc=com
               objectClass: groupOfURLs
               # ...
               overlay dynlist
               dynlist-attrset groupOfURLs memberURL member
           A  dynamic group with dgIdentity authorization could be created with an
           entry like
               dn: cn=Dynamic Group,ou=Groups,dc=example,dc=com
               objectClass: groupOfURLs
               objectClass: dgIdentityAux
               cn: Dynamic Group
               memberURL: ldap:///ou=People,dc=example,dc=com??sub?(objectClass=person)
               dgIdentity: cn=Group Proxy,ou=Services,dc=example,dc=com


                  default slapd configuration file


           slapd.conf(5), slapd-config(5), slapd(8).  The slapo-dynlist(5) overlay
           supports dynamic configuration via back-config.


           This  module  was  written  in  2004  by Pierangelo Masarati for SysNet
           Attribute remapping was contributed in 2008 by Emmanuel Dreyfus.

    OpenLDAP 2.4.40 2014/09/20 SLAPO-DYNLIST(5)


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