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 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