[Freenet-support] depth of subspaces

[Zlatin Balevsky]

is there any limit of the depth of subspaces within other subspaces?   can I create a key in a subspace within another subspace?  if yes, what will be the syntax of the key?   ssk@subspaceA,subspaceB,actualKey  ? ssk@(ssk@subspaceA,keyforB),actual key ?