private String createFragment(final Value resource) {
        if (resource instanceof URI) {
            String frag = ((URI) resource).getLocalName();
            return RESERVED_FRAGMENTS.contains(frag) ? frag + "_" : frag;
        } else {
            return resource.stringValue();
        }
    }
private String createFragment ( final Value resource ) { if ( resource instanceof URI ) { String frag = ( ( URI ) resource ) . getLocalName ( ) ; return RESERVED_FRAGMENTS . contains ( frag ) ? frag + "_" : frag ; } else { return resource . stringValue ( ) ; } }
Simplifies the lexical representation of a value, in particular by taking the fragment identifier of URIs.
This is a lossy operation; many distinct URIs may map to the same fragment.
Conflicts with reserved tokens are avoided.

@param resource the Value to map
@return the simplified fragment