Allen, I'm also a bit concerned about this. I apologise, because I didn't realise when we were discussing this on the call that you had taken the action to make this change - I was in too much of a hurry to move on to the next item. My concern is that I don't know what it means to "return the data", in a context where we have several possible interfaces for accessing data, including ByteIO and the various DAIS specs, each of which operate on names. I don't think I understand Dieter's suggestion sufficiently well to see how it would affect the overall architecture. It certainly sounds an interesting idea and if we can incorporate it simply then that's all to the good, but I'd rather we had a longer talk with Dieter first. Best wishes, Dave. _____ From: owner-ogsa-d-wg@ggf.org [mailto:owner-ogsa-d-wg@ggf.org] On Behalf Of Allen Luniewski Sent: 16 March 2006 16:59 To: ogsa-d-wg@ggf.org Subject: Fw: Re: [ogsa-d-wg] Discovery Service - Returning Data Peter's mail bounced. Allen ----- Forwarded by Allen Luniewski/Almaden/IBM on 03/16/2006 08:54 AM ----- Message-ID: <20570961.451142526276621.OPEN-XCHANGE.WebMail.tomcat@sala.cscs.ch> Date: Thu, 16 Mar 2006 17:24:36 +0100 (CET) From: Peter Kunszt <pkunszt@cscs.ch> To: ogsa-d-wg@ggf.org Subject: Re: [ogsa-d-wg] Discovery Service - Returning Data hi allen i don't know.. i get an uneasy feeling when service discovery is mixed with ontologies and content. to me, e.g. DNS is service discovery already, and certainly it does not give me the semantics or content of the service. i would separate any kind of content retrieval from service discovery, it feels 'cleaner' for a SOA. otherwise i'm afraid service discovery will be too large a beast to manage.. just my swiss 2cents... cheers peter -----Urspr=C3=BCngliche Nachricht----- Von: owner-ogsa-d-wg@ggf.org im Auftrag von Allen Luniewski Gesendet: Mi 15.03.2006 18:26 An: ogsa-d-wg@ggf.org Betreff: [ogsa-d-wg] Discovery Service - Returning Data =C2=A0 At today's call, I took on an action to update the discovery service section to allow for discovery services that returned the data of interest rather than a reference to the data.=C2=A0 Here is the updated material for your=C2=A0 consideration: Resource Discovery Discovery services are vital to the data architecture.=C2=A0 The data services may use the discovery services not just for registering services themselves, but also for registering the data sets that are stored by those services. This requires languages or ontologies for describing data. Discovery services may also register the locations of schema definitions. Discovery services may be built upon metadata repositories that contain information about other entities in the grid such as resources, and services.=C2=A0 Some discovery services may return the name of the service and some may return an EPR to the service.=C2=A0 Some discovery services may ta= ke a description of the desired data as input and return the data itself. Allen