As defined here http://dglazkov.github.com/component-model/dom.html (https://github.com/dglazkov/component-model/tree/0c43780747c56336ba581c391db42c171304368a)
The spec is now here: http://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/shadow/index.html
Closing as this is no longer relevant.