When I create a roll template, I define it's properties; what they are named and how they interact with things. The default template only has 'name' as a property (see the wiki: <a href="https://wiki.roll20.net/Roll_Templates#Built-In_Ro" rel="nofollow">https://wiki.roll20.net/Roll_Templates#Built-In_Ro</a>... ) otherwise, it depends on which character sheet you are using; the character sheet's author defined them.