[evla-sw-discuss] ASDM

[Bryan Butler]

the question is whether we want to do it this way, or have the PDM be what's 
passed around before observing, and quantities filled into that.  then DCAF 
takes the PDM information and stuffs it into the SDM.

	-bryan


On 4/7/06 16:26, Barry Clark wrote:
> It occurs to me that propagating an incomplete (A)SDM through the 
> software system 
> ObservingTool -> Executor -> DCAF -> Archive,
> having each piece fill in the things it knows about, would be a good
> way to organize things.  This will ensure that there is a path from
> appropriate places into the Archive for everything.  Starting down this
> path now will give us a leg up on the eventual system, and will provide
> a useful bit of non-throwaway code in the implementation of the 
> interim system we are now coding for the VLA correlator.
> 
> The effort which I understand to now be underway to provide an XML schema
> for the ASDM will make it easy to deal with such a thing.  The incomplete
> (A)SDM would be passed from program to program as an XML document,
> and unmarshalled into a java object (or C struct if we need that), 
> via JAXB for java (and similar things are available for C).  The additional
> things that element knows about would be inserted into the object, and
> the object marshalled into an XML document for shipment on to the next
> element.
> 
> If we go with the ASDM schema, we might like a little feedback into 
> the process of constructing it.  Primary need would be to make many 
> (most?) elements optional, so the incomplete object can be passed around 
> without having to have upstream elements insert dummies for things they 
> shouldn't have to understand.
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