1. Coordination Portal/Data sources L2:Data access & Handling Points to be raised : - Downloading data sources/data via the Portal…keeping visibility of data sources and efficiency of the Portal. -Technical options: link to the data source page – redirection to the data source page with a prefilled interrogation form – direct download with a sign ‘you are downloading data from…’ -The data access must be fully open…check compatibility with data source policy…

2. Portal / Data source interface The Seismic Plus portal Data Access Layer service Data archive Data description Data access Tools VO standard, protocol and format :  TAP : Table Access Protocol  SSA : Simple Spectra Access  … Specific to data archive Query VOTable XML ? The Portal – technical options

3. VO standard, protocol and format For example Table Access Protocol (TAP) Defines Web service protocol for accessing general table data:  Data queries for data access  Metadata queries for data description Testing DaCHS framework (TAP implementation developped by the German VO) with SSI database. Visibility in VO registries and VO tools like TOPCAT, VOSPEC Help to define a common language, vocabulary Make portal developments and maintenance easier Knowledge and support from OV-Paris Location near the database The Portal – technical options