putting the x in DOMx: s/XList/D.x.List, s/D._/D.x._, s/D.extend/D.x.add, s/D._.resolve[]/D.x.alias() (where D is document)
use x- as consistent attribute/element prefix: s/data-domx-/x- and s/data-/x-
s/source/content to align with template tag terminology
better names for type sets (and new container set)
s/parentNodes/parents
obsolete
'key' is confusing in the comment
0.14.0