I’ve updated the article Applying SVG effects to HTML content to actually have useful information, as well as an example. More work is forthcoming, as examples of how to use external document references need to be added.
I’ve stricken the original plan to have a separate article on using external references for SVG effects; that doesn’t make a lot of sense in retrospect, so I’ll put that information in the same article.
The article Controlling DNS prefetching should be complete at this point, barring any errors that are pointed out to me by others.
As always, I eagerly await comments and corrections on these or any other content on MDC!