Ideally SVG ought to be embedded as a subtree inside an xhtml document, or be linked in an html document through an <a href=”my.svg”> tag. GWT would provide the logic to make these graphics dynamic…
However GWT initialization today is tightly linked to HTML and depends on a procedure involving iframes to bootstrap the process. This means you cannot currently use GWT code in another container than html. Too bad. If GWT code could live in other, javascript enabled containers (xhtml, svg, web workers), it would greatly broaden its potential.
The most thorough analysis (and even prototyping) of a generalized and open bootstrap process has been made by Archie Cobbs but alas it has not seemed to raise all the attention it deserves from the GWT team.