D-Net

based on the sparql templates competency is a string, in the model it is a PE36_Competency_Type

Let\s check if we do not get the following warning at client side by setting the response status in void GET methods that write directly on the output stream. The warning is: 'org.springframework.http.converter.json.MappingJackson2HttpMessageConverter- Failed to evaluate serialization for type [void]: java.lang.IllegalStateException: Failed to instantiate standard serializer (of type com.fasterxml.jackson.databind.ser.std.NullSerializer): Class com.fasterxml.jackson.databind.ser.BasicSerializerFactory can not access a member of class com.fasterxml.jackson.databind.ser.std.NullSerializer with modifiers "private"'

I do not want to register also the E55_Types

better error logging

ignore integration test

Added crm:P2_has_type for all sparql query templates

Some vocabulary codes changed, updating the cleaner rule accordingly

Vocabularies updated to latest version provided by Felix on March 14th

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