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The International Virtual Observatory Alliance (IVOA) Composition & Purpose Juan de Dios Santander Vela (IAA-CSIC)
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VO Course 03: IVOA, the International Virtual Observatory Alliance

Jun 11, 2015

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Description of the elements and purpose of the IVOA, the International Virtual Observatory Alliance. Part of the virtual observatory course by Juan de Dios Santander Vela, as imparted for the MTAF (Métodos y Técnicas Avanzadas en Física, Advanced Methods and Techniques in Physics) Master at the University of Granada (UGR).
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Page 1: VO Course 03: IVOA, the International Virtual Observatory Alliance

The International Virtual Observatory Alliance (IVOA)Composition & PurposeJuan de Dios Santander Vela (IAA-CSIC)

Page 2: VO Course 03: IVOA, the International Virtual Observatory Alliance

Overview

The International Virtual Observatory Alliance

Working Groups

Interest Groups

The IVOA Document Process

Anatomy of an IVOA standard

Page 3: VO Course 03: IVOA, the International Virtual Observatory Alliance
Page 4: VO Course 03: IVOA, the International Virtual Observatory Alliance

IVOA

Working Groups

Applications

Data Access Layer

Data Modelling

Grid & Web Services

Resource Registry

Semantics

VO Events

VO Query Language

VOTable

Interest Groups

Radio (obsolete)Data Curation &

Preservation

Theory

OGF AstroRG

Steering & Coordination

IVOA Executive

Technical Coordination Group

Standing Committee on Standards & Processes

inspired

Page 5: VO Course 03: IVOA, the International Virtual Observatory Alliance

Working Groups

Page 6: VO Course 03: IVOA, the International Virtual Observatory Alliance

ApplicationsConcerned with the software tools used to access VO data and services for doing Astronomy

Announcement & discussion of VO applications

Feedback on standards’ implementation

Identify missing/desirable technical capabilities & and scientific usability for VO applications

Propose and develop standards specific to VO Astronomy-user-Applications

Page 7: VO Course 03: IVOA, the International Virtual Observatory Alliance

Data Access LayerDefine and formulates VO standards for remote data access

Simple Cone Search, Simple Image Access, Simple Spectral Access…

Table Access Protocol

Data Access Layer Interface

More!

Page 8: VO Course 03: IVOA, the International Virtual Observatory Alliance

Data Modelling

Provides a framework for the description of metadata attached to observed or simulated data

Logical relationships between these metadata, based on how astronomers retrieve, process & interpret astronomical data

Provides an architecture to handle them

Data Models are used across all VO standards

Page 9: VO Course 03: IVOA, the International Virtual Observatory Alliance

Grid & Web Services

Defines the use of Grid technologies and Web Services within the VO context

Investigates, specifies, and implements required standards in this area

Page 10: VO Course 03: IVOA, the International Virtual Observatory Alliance

Resource Registry

The IVOA Registry allows clients to be able to locate, get details of, and make use of, any resource located anywhere in any Virtual Observatory

This WG defines the protocols and standards for registry services interoperability

Page 11: VO Course 03: IVOA, the International Virtual Observatory Alliance

SemanticsExplore semantic technology with the aim of producing new standards that aid VO interoperability

Concerned with meaning & interpretation of words, sentences, or other language forms in astronomy

ActivitiesMaintenance of UCDsIVOA Standard VocabularyExploration of Ontologies

Page 12: VO Course 03: IVOA, the International Virtual Observatory Alliance

VO Events

Define the content and meaning of a standard information packet for representing, transmitting, archiving, and publishing a discovery of an immediate event in the sky

Who, When, Where, What, How

Page 13: VO Course 03: IVOA, the International Virtual Observatory Alliance

VO Query Language

In charge of defining a universal Query Language to be used by applications accessing distributed data within the Virtual Observatory framework

VOQL ➡ ADQL, PQL

Page 14: VO Course 03: IVOA, the International Virtual Observatory Alliance

VOTable

Responsible for the definition of the VOTable, and its evolution

Cross-links with the Apps, DAL, and DM working groups

Now in maintenance mode

Page 15: VO Course 03: IVOA, the International Virtual Observatory Alliance

Steering & Coordination Committees

Page 16: VO Course 03: IVOA, the International Virtual Observatory Alliance

Steering & Coordination Committees

IVOA Executive

Technica Coordination Group

Standing Committee on Standards & Processes

Page 17: VO Course 03: IVOA, the International Virtual Observatory Alliance

Working Draft

Notes

significantrevision

IAU Standard

Recommendation

Proposed Recommendation

agreement withinworking group

IVOA-wide RFC, 4 weeks,with TCG 4-weeks review

possible IAU endorsementIAU VO

Working Group

IVOAExecutive

An IVOAWorking Group

Document StatusProposing Body

IVOA Document Process

inspired

Page 18: VO Course 03: IVOA, the International Virtual Observatory Alliance

IVOA Documents