Extensible Match Filters - Netscape DIRECTORY SERVER 6.02 - PLUG-IN Manual

Understanding Matching Rules

Extensible Match Filters

In an "extensible match" filter, the client specifies that it wants to use the matching
rule to compare a specified value against the values of entries in the directory. (For
example, an extensible match filter might find all entries in which the
"sounds like"
An "extensible match" filter contains the following information:
• The OID of the matching rule or the attribute type that you want to search (or
both)
• The value to search for
• A preference indicating whether or not to also search the attributes in the DN
For example, if the OID "1.2.3.4" identifies a matching rule that performs "sounds
like" matches, the following extensible match filter attempts to find entries where
the
mail
(mail:1.2.3.4:=moxie)
In the search filter, the client can specify the OID (that identifies a matching rule)
and the attribute type. This indicates that the value in the filter should be compared
against the attribute using the matching rule.
For example, if the OID 1.2.3.4 specifies a "sound-alike" match and if the string
representation of the search filter is:
(uid:1.2.3.4:=moxie)
the client wants to find entries in which the value of the
moxie
Note that although the LDAP v3 standard allows clients to omit the OID or the
attribute type, at this time, the Netscape Directory Server only supports extensible
match filters that specify both the OID and attribute type.
The filter can also specify a preference indicating whether or not to also search the
attributes in the DN. For example, if the OID 1.2.3.4 specifies a "sound-alike"
match and if the string representation of the search filter is:
(sn:dn:1.2.3.4:=moxie)
the client wants to find all entries in which the value of the
attributes in the DN (for example,
124 Netscape Directory Server Plug-In Programmer's Guide • May 2002
.)
melon
attribute "sounds like"
.
.
moxie
, , , or ) sound like
uid cn ou o
attribute
sn
attribute sounds like
uid
attribute or the
sn
.
moxie