Important information since there seems to be still a wide-spread misunderstanding in the public on the use of parentheses in classifications:
(2004-09-16 Erich H. Haiderer)
H(L)'s as other names with parentheses as e.g. L(LL) do NOT in any way indicate that they contain both parts (the part left out of the parentheses, and the part within parentheses).
Based on the policies followed by the NomCom (which is stated in the introduction 
to every Bulletin) correct is: 
"For Chondrite groups, petrologic types, shock stages, and weathering
grades, slashes (e.g., H5/6) indicate transitional assignments. Hyphens
in petrologic type assignments for Chondrite (e.g., H5-6) indicate the
range of types observed in breccias. Group names such as "L(LL)"
indicate uncertain assignments, with the less probable group in
parentheses."
According to this convention the listing for Dhofar 428 e.g. in the
Bulletin as an H(L)5 means that it this does not at all suggest that the material would be a transitional member. It simply indicates an uncertain (pending) assignment of provisional EITHER an H5 or L5.
To consider Dhofar 428 an H/L5 would be based on no facts. H(L)5 just suggest that there was not yet enough research done to decide if it is an H5 OR an L5!
The failure to focus on this small but for the objective facts essential difference of nomenclature has led already to errors even in some experts catalogues. 
In the contrary NWA 2488 classified as H/L5 INDEED IS a member of the transitional H/L group.