Suppose I have a (documentclass-)article with several sections and one appendix. Some sections have several subsections and within them, subsubsection. Now, the appendix is about the same size and scope as a single subsection, not an entire section. But - it is not an appendix-to-a-single-section.
I like that it's listed as a section on the table of contents. I don't even mind very much that it's set in the font size of a whole section. But - I do want its subdivisions to be the equivalent of subsubsections. Unfortunately, if I actually use subsubsections, it's as though I'm in "subsection 0" - especially with respect to numbering: The ToC will have "A.0.1", "A.0.2" etc. - and the subsubsections themselves will have those numbers too. And if I use subsections, I'm giving too much "importance" to a short piece of text.
So, my simpler question is: Is there a not-super-ugly way of getting "A.1", "A.2" numbers of for subsubsections in my appendix? Or perhaps getting subsections in the appendix to be typeset like subsubsections in the main body of the paper?
And a more complicated question: Has there been any writing/package/documentclass work on how to handle this issue more methodically? Not just as it regards numbering and font size?