XBL and dynamic XSLT require a pseudo-node to indicate an insertion point for content. This the concept represented in XBL as <children> and in XSLT as <apply-templates>, but doesn't have an implementation yet... This isn't necessarily specific to XBL or XSLT, so it needs to live in the object model code, and be scriptable. Also, it isn't part of the DOM standard, so I'm guessing the interface will need to be private, whatever that entails... Setting component to XBL, for lack of anything better.
jst: cc'ing you on this bug; it's the one pertaining to tracking children insertion points in the DOM that I mentioned a few days back.
I'm not actually certain any more that either XSLT or XBL needs this at all... Dave: how would you want to implement <children> insertion points (if they weren't bungled)? I'm trying to figure out how I'm supposed to do this in XSLT...
resolving as invalid, per hyatt