On Fri, 2009-12-18 at 11:59 +0200, Nina Jeliazkova wrote:
> Dear Pantelis, All,
> 
> chung wrote:
> > However...
> >
> > * When building a new model, the service has to generate a new feature
> > that will be used as a pointer to the predictions made by this model. Is
> > this operation implemented?
> >
> >   
> Provided we don't have currently API for creating new features (these
> are more or less embedded in datasets), there are two options I can
> think of:
> 
> 1) Extend the API to include Feature creation (independent of a
> dataset), e.g. /feature POST rdf-representation-of-a-feature  (similar
> to feature_definition POST in API 1.0)
> 

The current version of the API (see
http://opentox.org/dev/apis/api-1.1/Feature ) includes that operation.
The client posts an RDF representation and creates a new feature URI.

> 2) Embed the RDF representation of the new feature into the RDF
> representation of the dataset, which is then POST-ed to a dataset service. 
> 
> e.g. if a feature is described with triples  and there is no feature
> URI, the dataset service will assume a new feature is to be created;
> 

That's also a solution, but the embedded feature will not be globally
accessible. I think the first solution is better. 


> In fact the two options are not mutually exclusive, with the first more
> generic and the later requiring a single POST call to the dataset
> service, instead of two (one for feature creation  and one for posting a
> dataset).
> 

Indeed in the first case we need two requests but the feature creation
will not be very time consuming and the Content-length the client has to
post is not that big, so I think the first option is not prohibitive. 

> Are there any preferences?
> 

I'm in favor of the first solution. So if there are no objections I
think we should proceed this way (because we're running out of time...)

Best Regards
Pantelis

> > * When a client posts a dataset on a model to make a prediction, then
> > the service generates a new dataset which (according to the API) should
> > be posted to a dataset service. Is this operation available?
> >   
> ambit services accept SDF datasets on POST currently, and RDF upload
> will be available later today (if everything works right).
> > * How can I calculate a feature value for a certain compound URI? Is
> > there an example (e.g. curl command)?
> >
> >   
> Perhaps we need "compound_uri" parameter for algorithm API, similar to 
> Model API ?   
> 
> AFAIK TUM are developing descriptor calculation service, it will make
> sense to synchronize parameter names.
> 
> Hope this helps,
> Nina
> 
> 
> > Best Regards,
> > Pantelis
> >
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> >   
> 
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