That would make sense if the two civics were mutually exclusive (like Representation and Universal Suffrage in the original civics). What would be a examples of regimes that had
- Parliament but not Representation?
- Representation but not Parliament?
- Both Representation and Parliament?
Also, your definition suggests they are both forms of government, which begs the question: why are they in separate civic categories?
Well, as far as I know in Doc, Representation and Parliamentarism are civics in the Organization column, which is what I was talking about.
As for regimes with a Parliament and no direct representation, most modern liberal democracies are like this, with referendums being very rare. Representation without a Parliament would be more like a city council, or the workers' councils of the USSR.