> 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