Re: IVO architecture

From: Masatoshi OHISHI <masatoshi.ohishi-at-nao.ac.jp>
Date: Mon, 29 Mar 2004 19:42:55 +0900


Doug and Roy,

>These are the assignments of architecture components to people -- I hope it
>is correct!
>
>Registry -- Linde
>Data Models -- McDowell
>VOQL -- Ohishi
>DAL -- Tody
>UCD -- Williams
>VOTable -- Ochsenbein
>Grid/Web Services -- Rixon
>Applications -- McGlynn
>Theory -- Lemson
>Moore -- Data engineering

As far as for VOQL, it is correct.

At 18:50 04/03/27 -0700, Doug Tody wrote:
> o Maybe Compute Services should be renamed Application Services?
> (or maybe Analysis Services). That is, astronomy-related services
> such as a cross-matching service. Unlike the DAL services, which
> are finite in number, application services are open ended. There is
> no clear distinction between applications services and tools.

I agree with Doug. Because VO is an application, I prefer to call it as "Analisis Services".

> o HTTP, SOAP, and Grid Services are variations on the same thing,
> there is no real distinction.

GGF is going to abondon OGSI and to introduce WSRF (Web Services Resource Framework), and is going not to use "Grid Services". I have no problem to use "Grid Services" in this diagram, however, we need to use other term very soon.

> o ADQL is a lower level technology we would like to integrate into
> the DAL services to allow more complex queries. Maybe I am just
> misreading the diagram, but it appears to suggest ADQL is specific
> to the registry. (ADQL and data models can in principle be used
> all over the middle level; maybe that is what the think and thick
> arrow are supposed to signify).

In the synthesized diagram, "standard queries" are use to communicate between the "Portals and so on" layer and the "Data Services" layer. This should be replaced with ADQL (x/s). Here ADQL/s stands for a string form of ADQL and ADQL/x for an XML form of ADQL, and both are basically identical. Since we agreed to use ADQL/x for communications between machines, "OpenSkyQuery/ADQL" in the middle of the diagram should be replaced with "ADQL/x".

There is "VOQL" on the "Semantic Web (UCD)" box, however, it is under discussion between our registry WG and us.

Cheers,

    Masatoshi Received on 2004-03-29Z10:44:07