Re: RDF addDatasource

On 09.02.12 12:10, Pernot Christian wrote:
> Le 09/02/2012 10:42, Neil a écrit :
>> Pernot Christian wrote:
>>
>>> We're currently dealing with RDF datasources.
>>> We use one RDF for displaying a tree (dont-build-content), and we'd
>>> like to update and add parts of the tree dynamically.
>>>
>>> We use the compositeDatasource to add RDFDatasources, but it does not
>>> work if the elements in the new datasource were already present in the
>>> original datasource. We really want the new datasaource to overwrite
>>> existing parts, I thought the coalesceDuplicateArcs should deal with
>>> this case, but it is not (maybe the RDF we build does not have the
>>> required attributes ?)
>>
>> Maybe you need to allowNegativeAssertions and use those to disable the
>> existing parts?
>>
> We already have allowNegativeAssertions = true on the composite
> datasource, but maybe is there something we need to put in the rdf so it
> understands it better ?

I think you can only add negative assertions by overlaying an in-mem 
resource, or otherwise explicitly add an arc to the DS that has a 
negative truth value.

Axel