To-Do

• There should be warnings when you use over-content with a name that is implemented in more than one page, or more than one place.
• There should be a way to say that you should use the first name. How are names ordered? Should pages have a predictable ordering?
• There should be a way to use over-content with multiple names, which will repeat the element multiple times.
• There should be a way to include a page with a prefix on all its names. This way external namespaces can be applied.
• Should href, src, and action attributes be fixed up so that relative links will still work?
• Prefixing of id attributes, and CSS, could be spiffy. CSS prefixing requires CSS rewriting, which seems infeasible.