Multistate Tags using metadata properties

Could I please get some more details around the options for multistate tags (enums):

ie 0=Off, 1=On, 2=Disabled, 3=Emergency stopped

I see Axiom has a State Drawing mode for a tag - is it possible to have these states use metadata properties? (Are specially named properties required)?

Is there a way to handle multistate tags completly automatically (ie in Views or Calcs)?

Should they be configured as strings or as int?