[MOBY-l] MobyDataSetInstance vs MobyDataSimpleinstance

[Paul Gordon]

>   Yes, Instance should be used in time of executing a service. Or calling 
>a service, I am not sure now (I nbever wrote any BioMoby service myself, 
>yet :-)).
>  
>
Aha :-)

>   But I may still be a bit confused. So my question is still here: Could 
>you or could you not to use MobyPrimaryDataSet to create a service 
>template and use it for finding matching services in a registry?
>  
>
MobyDataSimpleInstance now calls super.toXML() when appropriate, but
for now, MobyDataSetInstance reimplements the central-mode toXML() 
because it is unclear how
MobyDataSetInstance.setElements() should be used.  Us people 
implementing services run into these snags ;-)

Personally, I'd be much more comfortable with a 
MobyPrimaryDataSet.setElementTypes()/addElementType() structure, since 
it doesn't make much sense to pass in an actual number of items (as an 
array encodes) unless you've got MobyDataInstances.  In this case, I 
could update the MobyPrimaryDataSet datatypes list in a reasonably 
efficient way within MobyDataSetInstance.setElements(), and call 
super.toXML() when appropriate.