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Subject: RE: [wsrf] Issue: ServiceGroupEntry as a WS-Resource is too Heavyweight.
-----Original Message----- From: David Snelling [mailto:David.Snelling@uk.fujitsu.com] Sent: Monday, Mar 28, 2005 9:23 AM To: Yalcinalp, Umit Cc: WSRF Subject: Re: [wsrf] Issue: ServiceGroupEntry as a WS-Resource is too Heavyweight. Umit, On 25 Mar 2005, at 19:52, Yalcinalp, Umit wrote: >> 2) The add operation will need to return a 'key' (URI?) that has the >> adequate properties that would allow a client to remove the entry. We >> will also need to include a remove operation to replace destruction of >> the ServiceGroupEntry. > > <umit> Can you clarify how the add operation will determine the value > of > this key and whether an existing key will be returned if the Entry > already exists? I am wondering whether there is the EPR equality > question that may be lurking there on behalf of ServiceGroup to provide > the mapping to a key value and what that might be. > </umit> The method for creating the (effectively opaque) key is implementation specific. The spec would only provide the one-to-one relationship to entries. Adding a member twice will create to two distinct entries both referencing the member with unique keys. In mathematics speak, "The SG is a 'bag' of members and a 'set' of entries." <umit> I think it is imperative that we make this clear in wording in the SG, since the "bag" but "not set" of members concept somehow escaped me. </umit> I didn't mention the possibility that using EPR's for identity went against the current thinking in W3C, but you are right. This would be another motivation to dropping this use of the EPR. -- Take care: Dr. David Snelling < David . Snelling . UK . Fujitsu . com > Fujitsu Laboratories of Europe Hayes Park Central Hayes End Road Hayes, Middlesex UB4 8FE +44-208-606-4649 (Office) +44-208-606-4539 (Fax) +44-7768-807526 (Mobile)
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