Converts an Elem to an ElemBuilder, given a parent scope.
Converts an Elem to an ElemBuilder, given a parent scope.
The resulting (root) ElemBuilder gets the following namespace declarations: parentScope.relativize(elm.scope).
Converts a Node to a NodeBuilder, given a parent scope.
Converts a Node to a NodeBuilder, given a parent scope.
The following must always hold: fromNode(node)(parentScope).build(parentScope) "is structurally equal to" node