Minutes for Registry Session 1: 
Registry InterOp & Future Directions

Ray shows the map of Registry standards

Registry Interface v1.0 (PR)
  - WGs RFC done
  - TCG RFC -> editorial comments + relaxed rules for KeywordSearch +
    ADQL v1.0 incorporated in the doc 
  - doc submitted, not yet published

RofR with validator for Harvesting interface -> running smoothly (~13 Registries)
ivoaregistry -> for calling/testing Search interface (Java lib)
  - Mark signal major issues with the Search interfaces of (almost)
    all Registries (ADQL search method) 
    + most usual example of trouble query -> searching for a specific
      type of service (SIA, SSA, ...) 
    + discuss this query on the mailing list and try to tweak
      Registries so that there is a way to do it uniformly 
  - no existence of RofR for Searchable Registries, issue ?
    + how to dynamically discover Searchable Registries ? needed ?,
      there are only 3 or 4 at the moment 

Various in-progress Registry extensions (in order of importance)
  - VODataService - ready for RFC
  - VOStandard - schema to be reviewed (needed by VOSpace)
  - VOApplication - early draft
  - SCS, SIA & SSA - schema in use, doc needed
  - SkyNode - no schema planned
  - VOEvent, VOSpace, TAP & SLAP - taken care of in respective WG

Call for contributers / more activities

InterOp issues ?
  - K. Benson -> spaces around identifiers in XML (regex restriction
                 of "token") giving issues to AstroGrid with XQuery 
    + please everybody trim the identifiers in the XML records (Heasarc)
  - G. Rixon -> some records from CDS do not use UTF-8, works if the
                harvesting Registry checks the encoding 
  - G. Rixon -> a few other specific issues (e.g., schema location
                problem), to be sent to mailing list for analyze 

All harvesting Registries harvest all publishing Registries - usually
every 2-hours or weekly (at least) 

Future directions
  - replace old-ADQL with :
    + XQuery
    + astroBrowse (extensions to KeywordSearch with annotations,
      boolean ops, ...) 
    + ADQL + O/R model (uTypes?)
  - VOTable output, a la TAP
  - semantics integration
  - any other innovations ?
  - mention of the disparity in identifying keywords, makes it hard
    for beginners to find services 
    + fix with extended KeywordSearch and semantics
    + curation of Registry records important too ("subject" empty most
      of the time) 
  - annotate records with user comments or ratings

Summarys (RP)
  o  Some harvesting interoperability issues have arisen, but dealing
       with them on individual basis well enough
  o  agreement to adopt convention of no space around identifiers in
       VOResource records.  
  o  noted that publishing registries are (mysteriously) now showing
       new compliance errors; need regular testing?
  o  search interoperability becoming important for application
       developers.  Would like to discover a list of registries to
       search, can fall back on another one when first choice is
       down.  (Including TOPCAT, WWT)
  o  Search interface failures being experienced with all but
       Astrogrid registry currently. 
       +  STScI:   used to work fine; now throwing fault
       +  EuroVO:  some queries not working
  o  would like to document common search queries (e.g. searching for
       standard services) as Note; make sure all searchable registries
       can support them.  
  o  Current RI WSDL not consummable by at least one toolkit (oxygen?)
       due to problem with STC (included from ADQL).
  o  Would like to see validater for Search interface

Actions (RP):
  o  Document conventions, tips for registry providers
     +  no spaces around identifier
     +  common search queries
  o  Issue update to ADQLv1.0 XML schema to remove STC dependence
  o  Search Inteface validater