1. USERS COMPUTERS USER LAYER RESOURCE LAYER USING SHARING VO CORE PROVIDERS 20100525 IVOA Architecture VOSpec

2. USERS COMPUTERS USER LAYER RESOURCE LAYER USING SHARING VO CORE PROVIDERS 20100525 IVOA Architecture Data Models Semantics Browser Based Apps Script Based Apps Desktop Apps Data and Metadata Collection DATAACCESSDATAACCESS PROTOCOLSPROTOCOLS REGISTRYREGISTRY Resource Metadata Registry Interface VOResource ApplicationsRegExt StandardsRegExt VODataService SimpleDALRegExt VOSI SSAP SIAP SCS TAP SEAP SimDAP SLAP VOSpace VOPipe SAMP SSO UWS CDP WS BP VO Query Languages Formats ADQL PQL UCD Vocabularies Resource IdentifierVOTable SpectrumDM SSLDM VOEvent SimDM ObsCoreDM ObsProvDM CharDM PhotDM Utypes Units STC VOSpec FAP StorageComputation REC InProgress REC used Std to be updated or created

3. USERS COMPUTERS USER LAYER RESOURCE LAYER USING SHARING VO CORE PROVIDERS 20100525 IVOA Architecture Notes Protocols VOSpec is using (SSAP and SLAP) are UTYPE-based, so the use of UCDs is secondary UNITS DM draft is partially based in the Unit object used in VOSpec VODataService is used in the Registry query Resource identifier is internally used to distinguish the Registry records CharDM is indirectly used in two ways: when reading SSAP responses, and using the SED library, that has Characterization objects (There is an implementation of a connection between VOSpace and VOSpec, but currently disabled)