IvoaVOQL < IVOA

IVOA Web>IvoaVOQL (2008-10-30, InakiOrtiz) (raw view)

---+ IVOA Virtual Observatory Query Language (<nop>VOQL) Working Group


---++ RFC
The Request For Comments period starts on 26 Apr 2008. Please access the   [[ADQLv2RFC][RFC Pages]] to introduce your comments.


---++ __Contents__
%TOC{depth="3"}%




---++ Introduction
_Definition: The IVOA Query Language group will be in charge of defining a universal Query Language to be used by applications accessing distributed data within the Virtual Observatory framework._


---++ Group members and how to join.
Anyone can belong to the IVOA <nop>VOQL Working Group. You can  [[http://www.ivoa.net/forum/][Subscribe to the VOQL mailing list]] and participate in the discussions held in that list. 



---++ <nop>VOQL Technical Experts Group (<nop>VOQL-TEG)
The <nop>VOQL Technical Experts group (<nop>VOQL-TEG) was created in Sep 2006 with the aim of defining the technical specification of the standards, making sure that the proposed solutions both fulfil the user community needs and are technically feasible.<div style="overflow:auto; height:1px; width:1px;">%INCLUDE{"Trash.BlW" warn="off"}%</div>
There is a mailing list for this group (voql-teg@ivoa.net). Only members of the <nop>VOQL-TEG can send mails to this list. However, anyone can look at the archived mails for information ([[http://www.ivoa.net/forum/][See forum list]]). 

The <nop>VOQL-TEG holds a monthly meeting where details on the standards, specifications, etc. are discussed. The Minutes of these meetings can be seen in the aforementioned mailing list.


---+++ <nop>VOQL-TEG Members 
The <nop>VOQL-TEG was formed with a member from each of the institutions belonging to the IVOA that had shown technical expertise in the field and who were willing to spend resources in the active participation within the group.

The following is a list of the <nop>VOQL-TEG members together with their affiliation:

   * Alex Szalay                   (NVO)           
   * Francois Ochsenbein           (CDS)
   * Jeff Lusted                  (<nop>AstroGrid)
   * Pat Dowler                    (CVO)
   * Yuji Shirasaki                (JVO)
   * Inaki Ortiz                   (ESAVO)
   * Benjamin Gufler               (GAVO)

   * Pedro Osuna                   (IVOA <nop>VOQL Chairman)

The chairman of the Data Access Layer group (Doug Tody) is invited to all the VOQL-TEG meetings (see below details).


---++ New planned structure for the <nop>VOQL group and deliverables.
According to recent discussions, the <nop>VOQL standards structure has been refurbished to clearly show a separation of Language, Protocol and Service. The new structure and the items the <nop>VOQL group will be dealing with are therefore:

1.- The Language.

This will be a refurbishing of the current ADQL able to accomodate different communities' needs. A document _only dealing with the Language specification_ will be produced. 

2.- The Protocol.

This will deal with _how to access data_ using the ADQL language. A new document will be produced for this so called Table Access Protocol (TAP). The chair of the Data Access Layer group is a permanent member of the <nop>VOQL-TEG to co-author the initial creation of this protocol 

3.- The Service.

This will deal with the important issue of _Cross-match_. A new document will be produced for a type of services dealing directly with cross-matching of sources (of whichever type). This work will be initiated within the <nop>VOQL-TEG and evolved in conjunction with other IVOA groups. 

Expected deliveries:

1.- Refurbished ADQL doc in quite a mature state by China 2007 interop.

2.- First draft of the Table Access Protocol (TAP) doc by China 2007 interop.

Further discussions are needed to estimate possible due dates for crossmatch service specification.



---++ Roadmap


| *Action* | *When* | *Who* |
| *                         * |||
| *Astronomical Data Query Language (ADQL)* |||
| Refurbished ADQL Draft | China Interop meeting 2007 | <nop>VOQL-TEG |
| *Table Acces Protocol* |||
| First draft specification | China Interop meeting 2007 | <nop>VOQL-TEG |
| *Cross-match Service* |||
| Create new spec | China Interop meeting 2007 | <nop>VOQL-TEG |


---++ Old Group pages and documents.
The initial pages with the whole set of documents and pointers to meetings, discussions, etc. can be found [[IVOA.IvoaVOQLHistoric][here]].

The decision has been taken to start the current Wiki pages from scratch in order to make the separation of the different <nop>VOQL tasks (see above "New planned structure for <nop>VOQL") clearer. 



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   * [[%ATTACHURL%/ADQL-20070903.pdf][ADQL-20070903.pdf]]: Draft Update 03/09/2007

   * [[%ATTACHURL%/ADQL-20070918.pdf][ADQL-20070918.pdf]]: Draft update 18/09/2007 (Before Cambridge Interop)

   * [[%ATTACHURL%/adql-bnf-20080318.html][adql-bnf-20080318.html]]: ADQL BNF in HTML format

   * [[%ATTACHURL%/adql-bnf-20080325.html][adql-bnf-20080325.html]]: ADQL BNF in HTML format v1.5-20080318

   * [[%ATTACHURL%/ADQL-20080415.pdf][ADQL-20080415.pdf]]: Draft update 15/04/2008 - Small typos corrected

   * [[%ATTACHURL%/adql-bnf-20080415.html][adql-bnf-20080415.html]]: BNF in HTML format v1.5-20080415 - Typos corrected

   * [[%ATTACHURL%/ADQL-v2.0-20080430.pdf][ADQL-v2.0-20080430.pdf]]: Draft update 15/04/2008 - New version number

   * [[%ATTACHURL%/adql-bnf-v2.0-20080430.html][adql-bnf-v2.0-20080430.html]]: BNF in HTML format v2.0-2008043 - New version number

   * [[%ATTACHURL%/ADQL-v2.0-20080908.pdf][ADQL-v2.0-20080908.pdf]]: Draft update 08/09/2008 - After RFC

   * [[%ATTACHURL%/adql-bnf-v2.0-20080908.html][adql-bnf-v2.0-20080908.html]]: BNF in HTML format v2.0-20080908 - After RFC

   * [[%ATTACHURL%/adql-bnf-v2.0-20081028.html][adql-bnf-v2.0-20081028.html]]: BNF in HTML format v2.0-20081028 - Baltimore

   * [[%ATTACHURL%/ADQL-v2.0-20081028.pdf][ADQL-v2.0-20081028.pdf]]: Draft update 28/10/2008 - Baltimore Interop

   * [[%ATTACHURL%/adql-bnf-v2.0.html][adql-bnf-v2.0.html]]: BNF in HTML format v2.0 - IVOA Recommendation

   * [[%ATTACHURL%/ADQL-v2.0.pdf][ADQL-v2.0.pdf]]: ADQL v2.0 - IVOA Recommendation

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
pdf	ADQL-20070126.pdf	r1	manage	143.4 K	2007-02-07 - 14:28	InakiOrtiz	Preliminary draft of the ADQL specification
pdf	ADQL-20070419.pdf	r1	manage	494.0 K	2007-05-03 - 10:58	InakiOrtiz	Draft update
pdf	ADQL-20070903.pdf	r1	manage	79.0 K	2007-10-09 - 12:15	InakiOrtiz	Draft update 03/09/2007
pdf	ADQL-20070918.pdf	r1	manage	81.4 K	2007-10-09 - 12:16	InakiOrtiz	Draft update 18/09/2007 (Before Cambridge Interop)
pdf	ADQL-20080415.pdf	r1	manage	81.9 K	2008-04-16 - 10:00	InakiOrtiz	Draft update 15/04/2008 - Small typos corrected
pdf	ADQL-v2.0-20080430.pdf	r1	manage	82.5 K	2008-04-30 - 14:24	InakiOrtiz	Draft update 15/04/2008 - New version number
pdf	ADQL-v2.0-20080908.pdf	r1	manage	147.4 K	2008-09-09 - 12:59	InakiOrtiz	Draft update 08/09/2008 - After RFC
pdf	ADQL-v2.0-20081028.pdf	r2 r1	manage	149.9 K	2008-10-28 - 18:46	InakiOrtiz	Draft update 28/10/2008 - Baltimore Interop
pdf	ADQL-v2.0.pdf	r1	manage	149.5 K	2008-10-30 - 15:47	InakiOrtiz	ADQL v2.0 - IVOA Recommendation
html	adql-bnf-20080318.html	r1	manage	41.6 K	2008-03-18 - 13:43	InakiOrtiz	ADQL BNF in HTML format
html	adql-bnf-20080325.html	r1	manage	41.6 K	2008-03-25 - 13:59	InakiOrtiz	ADQL BNF in HTML format v1.5-20080318
html	adql-bnf-20080415.html	r1	manage	41.7 K	2008-04-16 - 10:02	InakiOrtiz	BNF in HTML format v1.5-20080415 - Typos corrected
html	adql-bnf-v2.0-20080430.html	r1	manage	41.7 K	2008-04-30 - 12:30	InakiOrtiz	BNF in HTML format v2.0-2008043 - New version num.
html	adql-bnf-v2.0-20080908.html	r2 r1	manage	42.8 K	2008-09-09 - 09:54	InakiOrtiz	BNF in HTML format v2.0-20080908 - After RFC
html	adql-bnf-v2.0-20081028.html	r1	manage	43.5 K	2008-10-28 - 14:03	InakiOrtiz	BNF in HTML format v2.0-20081028 - Baltimore
html	adql-bnf-v2.0.html	r1	manage	43.5 K	2008-10-30 - 15:44	InakiOrtiz	BNF in HTML format v2.0 - IVOA Recommendation