I understand your reasoning, Johne, but in publishing, what I describe is definitely called a style sheet. The publisher will always ask for one from the copyeditor.

I take what you describe here as the latter, ‘a set of standards for design and writing of documents.’ When I see ‘style sheet,’ I think of software that provides ‘a form of separation of presentation and content in desktop publishing programs that store and apply formatting to text.’ (And then there’s the web flavor of style sheets which is, itself, further distinct.)

I mention all of this not to quibble but to raise awareness and point out that the term ‘style sheet’ means different things in different contexts.

of course.