(r5) RegistryModel < IVOA

IVOA Web>IvoaResReg>RegistryModel (revision 5) (raw view)~~EditAttach~~

---+ Registry Model

%TOC%

---++ Entities
This is the starting point for developing a model of entities with which a registry needs to engage. To start with, we'll simply create a list of 'things' and add definitions to them:

   * resource
      * an item (with an identity) which is of interest or use to the Virtual Observatory community
   * service
      * a resource which can be invoked <br> __Note:__ service sub-types such as <nop>ConeSearch or SIAP are still considered to be services, not interfaces
   * interface
      * a physical, technical interface to a service
   * organisation
      * any type of organisation
   * site
      * a single location
   * publisher
      * an organisation responsible for *creating and maintaining* a resource
   * provider
      * an organisation responsible for making a __service__ *available* <br> __Note:__ since only services are invocable then only they ought to have a provider
   * data collection
      * a collection of datasets (or other collections)
   * copy 
      * a complete copy of a data collection <br> __Note:__ properties of the copy will represent the period a mirror is updated, the date/time a snapshot was taken etc. <br> __Note:__ copies of less than the whole data collection will form new collections with a 'derived from' relationship, much as the results of a query would have
   * snapshot
      * a copy of a data collection which is never updated
   * mirror
      * a copy of a data collection which is periodically updated
   * dataset
      * a single published set of data tables from a science team
   * table 
      * a set of data in which all rows have the same columns (??)
   * application
      * a collection of functions
   * function
      * a process that transforms data, generates information, etc. <br> __Note:__ I'm fairly sure we need both application and function but could do with better definitions
   * sky service
      * a service that makes one or more data collections available
   * tabular sky service
      * a specific type of sky service: one which accesses and returns tabular data
   * app service
      * a service that makes one or more applications available

---++ Model
Draft (simple) models of the terms above:

---+++ Resource model
%ATTACHURL%/Resource.gif

---+++ Registry model
%ATTACHURL%/Registry.gif

Topic revision: r5 - 2004-12-17 - TonyLinde

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