Dismax Parser uses DisjunctionMaxQuery to search the same term over mutiple fields with different boosts on each field, and picks the best scoring matching rather than summing all scoring macthes like a regular boolean query. It also does a term query and a phrase query for the user entered query.

We already sort of do this for Artist, Work and Label searches but not as effectively or neatly, so this ticket is to implement this properly and use for all indexes it is related to SEARCH-59