Anonymous concept is a subconcept of non anonymous concept
concept http://example/testProblemC1
concept _# subConceptOf http://example/testProblemC1
This WSML fragment is valid (if reparsed it would be the same)
Anonymous concept could not have sub concepts:
concept _#
concept http://example/testProblemC1 subConceptOf _#
The link between the two concepts is lost after a parse/serialize