In humanities, the matter is informally what is beingness talked about, and the remark (rheme or focusing) is what is beingness said almost the message. Tho’ this chief nature of topic-comment classification is mostly standard, anything beyond that is a matter of majuscule disceptation.
The secernment was belike primary advisable by Henri Philosopher in 1844. Georg von der Gabelentz distinguished psychological human (roughly message) and psychological objective (roughly nidus). In the Prag down, the dichotomy, termed topic-focus juncture, has been deliberate mainly by Vilém Mathesius, Jan Firbas, František Daneš, Petr Sgall and Eva Hajicová. They bed been troubled mainly by its recounting to prosody and word-order. The affect of Michael Halliday in the 1960s is probably obligated for bringing the ideas to Operable Grammar.
Annotation that in both categorizations, message refers only to the antonymous idea and remark to the noncontrastive line + rheme.