!!! Overview
[{$pagename}] is defined in [RCF 3045|http://www.ietf.org/rfc/rfc3045.txt].

"All [LDAP server implementers|LDAP Server Implementations] SHOULD maintain a [{$pagename}]. Note that this value is typically a release value--comprised of a string and/or a string of numbers--used by the developer of the LDAP server product (as opposed to the [supportedLDAPVersion], which specifies the version of the LDAP protocol supported by this server).

This is single-valued so that it will only have one version value. This string MUST be unique between two versions, but there are no other syntactic restrictions on the value or the way it is formatted.
{{{
      ( 1.3.6.1.1.5 NAME 'vendorVersion' EQUALITY
        1.3.6.1.4.1.1466.109.114.1 SYNTAX 1.3.6.1.4.1.1466.115.121.1.15
        SINGLE-VALUE NO-USER-MODIFICATION USAGE dSAOperation )
}}}

The intent behind the equality match on [{$pagename}] is to not allow a less than or greater than type of query.  Say release "LDAPv3 8.0" has a problem that is fixed in the next release "LDAPv3 8.5", but in the mean time there is also an update release say version "LDAPv3 8.01" that fixes the problem.  This will hopefully stop the client from saying it will not work with a version less than "LDAPv3 8.5" when it would also work with "LDAPv3 8.01".  With the equality match the client would have to exactly match what it is looking for.

Although [RCF 3045|http://www.ietf.org/rfc/rfc3045.txt] provides a methodology to determine the [vendorName] and [vendorVersion] of the LDAP server from the [RootDSE], many vendors do not provide this information. 

We have some methods that might help you [Determine LDAP Server Vendor].

!! More Information
There might be more information for this subject on one of the following:
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