The I VOA Architecture Christophe Arviset (ESA/ ESAC) Head of the - - PowerPoint PPT Presentation

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The I VOA Architecture Christophe Arviset (ESA/ ESAC) Head of the - - PowerPoint PPT Presentation

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The I VOA Architecture Christophe Arviset (ESA/ ESAC) Head of the Science Archives and Computer Engineering Unit Science Operations Department Chair of the IVOA Technical Coordination Group ADASS XXI, Paris, 8 th November 2011 I VOA

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The I VOA Architecture

Christophe Arviset (ESA/ ESAC)

Head of the Science Archives and Computer Engineering Unit Science Operations Department Chair of the IVOA Technical Coordination Group

ADASS XXI, Paris, 8th November 2011

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 2

I VOA Architecture

2 views required

(level 0 and level 1) view for “public” consumption

  • Global, generic, minimize VO jargon
  • Readable by all, not too technical

(level 2) view for IVOA and VO developers'’ needs

  • Extension of (level 1)
  • More detailed, all IVOA standards mentioned
  • Clear connections and inter-dependency between IVOA standards
  • Shows what is need to implement VO services

– As a Data Centre, an Application developer, a Service Provider, … – What building blocks are required to fulfill a science case

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 3

Access to Astronom ical Data and Services

For each Archive and for each Service

  • Some common

format (FITS)

  • Dedicated Data

Model

  • Dedicated

access interface No real inter

  • perability between

services

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 4

I VOA Architecture – Level 0

Hide specificities of each Archive and each Service to

  • ffer a common

framework for access and usage Yellow Page of Services Inter Operability between services

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 5

I VOA Architecture – Level 1

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 6

I VOA Architecture – Level 2 VO Core Protocols

Underlying building blocks for other standards VOTable

  • 1st IVOA std

and most used Unified Content Descriptor (UCD) Astronomical Data Query Langue (ADQL)

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 7

I VOA Architecture – Level 2 Data Access Protocols

Simple Access Protocols

  • Cone Search

(SCS)

  • Images (SIAP)
  • Spectra (SSAP)
  • Spectral Lines

(SLAP) Table Access Protocol (TAP)

  • More powerful
  • TAP/ ADQL+ DM
  • Table upload
  • sync / async

queries

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 8

I VOA Architecture – Level 2 Data Models

Core DM

  • STC, Utypes,

Units, Characterization Type-specific DM

  • Observation Core
  • Spectrum
  • Simple Spectral

Line

  • Photometry

TAP/ ADQL + DM

  • power and

abstraction to access any data collection VOEvent

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 9

I VOA Architecture – Level 2 Using and Sharing

SAMP enabling inter connectivity between VO applications Single Sign On / Credential Delegation Protocol for user authentication VOSpace for VO virtual storage Others for VO data processing workflows

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 10

I VOA Architecture – Level 2 Registry

VO Yellow Page service Find VO Resources

  • f different kinds

Publishing Registries Full Searchable Registries Harvesting Registries

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 11

I VOA Architecture – Level 2

All standards represent building blocks to be used depending of type

  • f VO services

Data & metadata VO Publishing VO Applications consuming VO services Processing and storage VO workflows

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 12

CADC : a VO com pliant infrastructure

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 13

TAPhandle

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 14

TAP/ ADQL/ UW S in SI MBAD

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 15

VO applications interoperability through SAMP

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 16

seleste : VAO TAP Client Application

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 17

SAMP used in other discipline: Soho Science Archive and Aladin

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 18

I VOA standards release through tim e

IVOA Standards issued per year

1 2 3 4 5 6 7 8 9 2003 2004 2005 2006 2007 2008 2009 2010 2011 Updated Standard New Standard

Planned 30 endorsed standards http: / / www.ivoa.net/ Documents/

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O03 – IVOA Architecture | Arviset | ADASS XXI, 08/ 11/ 2011 | Pag. 19

Reference and acknow ledgem ents

The IVOA Architecture (Oct 2010)

  • http: / / www.ivoa.net/ Documents/ Notes/ IV

OAArchitecture/ Stable since 1st version (Oct. 2010) Update foreseen in 2012 Thanks to all the people who have participated to the definition and the writing

  • f IVOA standards

Thanks to all the people who are developing VO services and applications