The w3c published a new recommendation for entity names: http://www.w3.org/TR/xml-entity-names/.
MathML 3 should implement all these entities and HTML 5 only a subset.
However, the actual entity parser cannot handle these new entities.
Thus, the entity parser should be rewritten in the following way (see discussion on the mailing list):
- use a prefix tree instead of a hash table (faster and handle entity names as long as wanted)
- handle entities associated to combined Unicode characters
- solve the conflict with XHTML 1.0 about ⟩ and ⟨ (see w3c webpage above)
*** This bug has been marked as a duplicate of bug 43595 ***