I use camel case when the subject needs two words in order to identify it. Underscores, I feel, can be used to separate and include multiple ideas within a sing

I use camel case when the subject needs two words in order to identify it. Underscores, I feel, can be used to separate and include multiple ideas within a single name, in order to explain or emphasize on a relationship. country_state_city or unitedStates_texas_houston or unitedStates_newMexico_santaFe edit: sorry, don't know HN's markup