done, although there are two hardcoded URIS that should be fixed
For the theme children linker: I dont really get how internal resources are built up. I now have two references that use hardcoded URIs:
1) in GenericResource.java: graph.add(resource, new Reference("http://localhost:8888/vocabulary#child") ,r).
2) in ThemeChildren.java: Reference child = new Reference("http://localhost:8888/eldis/resource/theme/" + obj_id);
use parent / child links to interlink themes