Navigation aide

[n8willis]

From a recent discussion, I think the biggest improvement that could be made to the gf-guide content would be to make it easier to get around.

The biggest impact would be a search feature (which is already open at #95); without it users have to go to an external site to find a specific subject.

The next best thing, though, would be to have a sidebar or some other on-page navigation aide, so readers are able to jump to a specific other page in one step. The current pages each have two or three links to other pages in header and/or footer positions, but which pages those are is somewhat arbitrary -- and some pages have both header and footer lists, but others have one but not the other. If you can't find a link in the text itself to something you want to cross-reference, all you can do is back up to the index page and look for it in the TOC, which isn't ideal.

For instance, the diacritics page says that the designer needs to be aware of specific language requirements, including tag names, but it doesn't link to the lang page. It does link to the overall-requirements page to point them to the mention of glyphsets (although that link's broken at the moment) so it's hard to find where the lang explanation lives. So, it's a closely related concept, but hard to get to.

A full index listing in a sidebar or header/footer would solve that, as well as giving readers a way to mentally orient themselves in the overall doc, which is also good.