Object class subschema

[Michael Ströder <michael@stroeder.com>]

HI!

Referring to section 6.2 of draft-ietf-ldapbis-syntaxes-02.txt:

---------------------- snip ---------------------
      ( 2.5.20.1 NAME 'subschema'
         AUXILIARY
         MAY ( dITStructureRules $
             nameForms $
             ditContentRules $
             objectClasses $
             attributeTypes $
             matchingRules $
             matchingRuleUse ) )

   The ldapSyntaxes operational attribute can also be present in
   subschema entries.
---------------------- snip ---------------------

What's the rationale behind not including attribute type 
ldapSyntaxes in MAY expression?

Ciao, Michael.