Within the WP WPMA it has been the convention to treat names of martial arts as common nouns not capitalized and not as proper nouns Where the word taekwondo is part of a proper name such as an organization it should be capitalized along with the rest of the name such as Rhee Taekwon Do where it is also written according to the official name of the organization So the first line of that article might read Rhee Taekwon Do is a school of taekwondo