sapui5 - List Report filters should not consider upper or lower case -

i dealing list report having 5 filter fields, created local annotation file (as cds view in backend has no annotations yet). of fields, backend needs value entered in uppercase. user may enter them in lowercase. so, understanding, there 2 possible options: - define such fields in uppercase - let user enter in whatever format, converting before sending request

but since created through annotations, not see possible way it. knows how deal this?

regards, martin