validation of SIA 2

[Pierre Le Sidaner]

Dear All

I was working on the SIA2 validator on the last days
I have a first version as a draft
http://voparis-validator.obspm.fr

I try it with the 3 examples taken from RFC Page 
http://wiki.ivoa.net/twiki/bin/view/IVOA/Siav2RFC
The SIA2 document is confusing because it refer to ObsCore without 
telling exactly what is mandatory.
Moreover I have question about SIA V2 and the implementations

* non of them support Inf as > or < of as it's proposed in the last 
documentation of sia2
like BAND=300 +Inf

* could you please reference the schema in votable to validate it, 
something like
xsi:schemaLocation="http://www.ivoa.net/xml/VOTable/v1.3 
http://www.ivoa.net/xml/VOTable/VOTable-1.3.xsd"

* for Utype example use an extension in the Utype name like 
obscore:Char.SpatialAxis.Coverage.Location.Coord.Position2D.Value2.C1
but as the Utype come from Characterisation, is it relevant to add 
obscore, specially taking into account that Utype should be normalized.

* for request in the query. In the example inside the document, REQUEST 
take the value query. Nothing in the documentation is related to DALI 
for that. http://dalservices.ivoa.net/sia_b?REQUEST=query&POS=CIRCLE 
180.475 -18.70 0.01&BAND= 0.0008 0.0009&TIME= 55708 
55710&COLLECTION=ALMA. It should be more explicit in the documentation. 
And one ref implementation does not support this parameter/value.

* what about datatype and xtype are they both mandatory in the votable 
output ? for s_region, s_fov ... in Obscore document there is both 
adql:REGION and AstroCoordArea does both are acceptable. VOTable schema 
should include a list of xtype if it's possible

* don't you see any problem as s_resolution have datatype=float and 
xtype=adql:DOUBLE and sometime double in obscore doc.

* what should I do with MAXREC, I mean what to test ?



The 3 examples I took where

http://www.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/sia/v2query?
it was my reference for test, if you try you must remove all the Inf

casda implementation
http://casda.csiro.au/casda_vo_tools/sia2/query
does not support Request=query,


VAO implementation
http://vaosa-vm1.aoc.nrao.edu/ivoa-dal/siapv2-vao/sync?
problem with DTD on votable


Please give feedback about the validator, I am sure there is some bogus 
left.

Regards
Pierre

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                            Pierre Le Sidaner
                         Observatoire de Paris

Direction Informatique de l'Observatoire
Observatoire Virtuel 01 40 51 20 82
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mailto:pierre.lesidaner at obspm.fr
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