[Datalink] and RESTful services

[Patrick Dowler]

On 17/09/14 09:22 AM, François Bonnarel wrote:
>> - for a custom sync service, there is no standardID
>>

>>
> OK, but why having no standardID in second case ? Laurent's idea was to
> use this to EXPLICITLY say it is not standard . The standardID value
> should be something like ivo://ivoa.net/nostd/Get or
> ivo://ivoa.net/nostd/Rest. Doing this everything will be explicit
> looking at standardID
>
> In case you have ivo://ivoa.net/nostd/Get you knox that you have to look
> for accessURL and Parameters of the HTTP-GET query in the same
> descriptor. Rest advertizes there is no description. accessURL should be
> anything we have.

It is simply extra material in the spec, defining a URI, and probably 
maing the standardID param required -- which seems an elaborate way to 
convey that there is no standardID. I'm always against special values 
for null when just NULL (DB) or optional element (XML) will do just fine.

Clients will still have to write code to deal with the case when 
standardID is not there and they will *do* the exact same thing in that 
case.

my 2c,



-- 

Patrick Dowler
Canadian Astronomy Data Centre
National Research Council Canada
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