subschemasubentry attribute usage in rootDSE

[hahnt@us.ibm.com]

Hello,

In reading RFC 2251 and RFC 2252, I have stumbled across a question regarding
the use of the subschemasubentry attribute type.

RFC 2251, in section 3.2.1, indicates that every entry mastered by a server will
have an attribute type included within it called subschemasubentry.  This
attribute type's value will be a distinguished name that 'points to' the
subschema entry in the namespace that describes the schema for which the entry
conforms to.  Quoting the RFC:

- subschemaSubentry:  the Distinguished Name of the subschema entry
     (or subentry) which controls the schema for this entry.


RFC 2252 in section 5.1.5, indicates that the subschemasubentry attribute type
is SINGLE-VALUE.  Quoting the RFC:

5.1.5. subschemaSubentry

   The value of this attribute is the name of a subschema entry (or
   subentry if the server is based on X.500(93)) in which the server
   makes available attributes specifying the schema.

    ( 2.5.18.10 NAME 'subschemaSubentry'
      EQUALITY distinguishedNameMatch
      SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 NO-USER-MODIFICATION
      SINGLE-VALUE USAGE directoryOperation )


Later on in RFC 2251, Root DSE is described in section 3.4.  In this section, it
 seems that a slightly different use of subschemasubentry is described.  Quoting
 the RFC:

 - subschemaSubentry: subschema entries (or subentries) known by this
     server.

Now my question:  The plurarlity in the sentence about subschemasubentry in the
Root DSEsection of RFC 2251 implies that this attribute type is multi-valued in
the Root DSE.  Is this the intent?  Is it the intent of the RFC that the
subschemasubentry attribute type be allowed to be multi-valued when contained in
the Root DSE, regardless of its definition as being SINGLE-VALUE as defined in
RFC 2252?

Thanks in advance for this clarification,
Tim Hahn

Internet: hahnt@us.ibm.com
Internal: Timothy Hahn/Endicott/IBM@IBMUS or IBMUSM00(HAHNT)
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