Dave Winer : "I can include directories maintained by other people..."
Which is great and all (it is) but I don't see anything
about the OPML-isness of it that I couldn't just do with XInclude. XInclude support is
available for all the fun toys too : Python,
PHP, Perl,
Java,
C and the standalone
xsltproc application. Additionally, even though no one seems to like it, XInclude uses XPointer for identifying snippets (and not necessarily "linear" ones) for inclusion. The eatdrinkfeelgood spec uses this to pull in ingredients and directions from multiple recipes. Example: this recipe for cheesecake sucks in this recipe for crust (see also : the recipes transformed as XHTML.)