D-Net

The availability type must be taken explicitly by URI prefix on types

Type and Ting should not be queried

Added crm:P2_has_type for all sparql query templates

Yes, let's use union everywhere

Looks like using UNION is much more performant than using OPTIONAL. See http://www.snee.com/bobdc.blog/2014/10/dropping-optional-blocks-from.html

Using specific queries for Software and Dataset: the one for DigitalObject has been deleted as it could not be executed because of timeout exception during tests. I do not want to run such heavy query on the production virtuoso

added missing namespace

removed wrong } in service sparql template

Let's try to get the providers for all types of resources

provider must come with at least the title