[cddlm] Doubts about Component Model

[Steve Loughran]

Stuart Schaefer wrote:
> Ayla,
> 
> The Component Model document was updated to clarify this.  The "Last
> Call" version changed the examples.  Internal elements are not allowed.
> Flow control elements can only be defined as children of a node in the
> property list.  They cannot have child nodes.

interesting.

I think my current impl. will implicitly allow stuff inside the 
elements, as it tends to treat them just like any other elements.

We need test cases of illegal declarations.