This part worries me a bit, but I'm not sure if I understand it. Does this mean we're completely ignoring all top-level items that aren't `p` tags or `tbl` tags? There's really nothing else in a document we care about?

Also, are you sure that t, pict and drawing are the only tags that can possibly contain something we care about? Seems like there is lots of potential for content loss, otherwise.

Also, what happened to text run tags? Are those the same as t tags?