new version of REST in the VO

[Christophe Arviset]

Andre, Doug

I would suggest you keep this discussion thread within the GWS WG and 
not through the whole interop mailing list.

Thanks

Christophe

schaaff at newb6.u-strasbg.fr wrote:
> Quoting Douglas Tody <dtody at nrao.edu>:
>
>> On Tue, 28 Oct 2008, Paul Harrison wrote:
>>
>>> On 2008-10 -28, at 04:44, Douglas Tody wrote:
>>>
>>>> I think it is fine to define some recommended practices for interfaces
>>>> based upon the pure-REST abstraction, but this should not in any way
>>>> invalidate the DAL2 interface pattern(*), which is already 
>>>> standardized
>>>> and widely used within the VO (and also based upon a HTTP transport).
>>>
>>> point of order - the DAL v2 interface pattern is *not* already 
>>> standardised, we are in the process of trying to create a V2 
>>> protocol family that is more capable/scalable than the v1 interface 
>>> pattern - this is why GWS WG is looking at using more advanced 
>>> techniques than were employed in the v1 protocols.
>>
>> It is true that the recent DAL2 architecture document per se is not a
>> standard, however essentially all the content therein was discussed
>> within the DAL WG for several years, leading up to promoting SSA
>> (the first of the second generation DAL interfaces, all of which
>> were intended to be consistent in terms of interface) to a standard.
>> SSA, and the older DAL interfaces which follow a similar pattern,
>> are VO standards in wide use within the community.
>>
>> Note that there is no reason that interfaces such as DAL2 (which
>> is based upon OpenGIS standards) and facilities such as UWS (which
>> exemplifies the pure-REST approach) cannot coexist.  This is already
>> being demonstrated in TAP, and the same pattern can carry over
>> to future interfaces such as SIAV2.  This, plus eventual VOSpace
>> integration will provide the scalability we all want.
>
> the aim of the REST work is not to obsolete existing (or future) 
> standards
> as sou said the use of (future) standards like UWS may provide de 
> facto RESTful services
> in any case it should be a guideline without any coercive meaning
> i think it would be ueseful to get inputs and comments from other WGs, 
> i will compile all these inputs for the next interop
>
>
> André
>
>
>>
>>      - Doug
>>
>
>

-- 
Thanks in advance

Cheers

Christophe


-------------------------------------------------------------------
Christophe ARVISET                       Christophe.Arviset at esa.int

European Space Agency (ESA)
European Space Astronomy Centre (ESAC)
Science Operations Department
Science Archives and Computer Support Engineering Unit

P.O. Box 78
28691 Villanueva de la Canada                 Tel: +34 91 813 12 78
Madrid - SPAIN                                Fax: +34 91 813 13 08
------------------------------------------------------------------- 


================================================================================================
This message and any attachments are intended for the use of the addressee or addressees only. The
unauthorised disclosure, use, dissemination or copying (either in whole or in part) of its content
is prohibited. If you received this message in error, please delete it from your system and notify
the sender. E-mails can be altered and their integrity cannot be guaranteed. ESA shall not be liable
for any e-mail if modified.
=================================================================================================