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Re: Add-if-not-present

>>> Soft Del: The attribute shall contain none of these values, but might
>>> have
>>> others
>> I'm not sure I understand how SOFTDEL differs from LDAP_MOD_DELETE.  Do
>> you mean that values listed in SOFTDEL will be deleted if they exist, or
>> otherwise ignored?
> Yes; LDAP_MOD_DELETE requires that the listed values exist.  The
> delete-all-values case is separate.  If we had
> cn: a
> cn: b
> and ran
> changetype: modify
> softdel: cn
> cn: b
> cb: c
> Then the result would be success and cn=a remaining.  Yes, this is useful!

Do you have a use case for this?  I'm implementing add-if-not-present to
ease the implementation of the version number overlay, so I could
implement softdel as well.

I think all of these could make sense also protocol-wise (including
softadd), but I'm not in the mood right now to start the formalization
process, so I'd leave it to a later time.