Why can modules not be annotated?

[Peter Kriens]

In [lang-vm][1] I found:

	‘A module declaration may not be annotated.’

I was surprised that modules (and their clauses) could not be annotated like package-info.java. Since the source syntax is not extensible, annotations could have been used to provide meta data for other module systems. This would mitigate some of the concerns of using a binary file to encode the module data.