JavaScript: using whose with "type =" does not what I expect

[cgrunenberg]

@chrillek

Now I’m wondering: what is contents() in a database (given that it inherits from records?) and what is parents() in a database? If I could nest databases, I’d understand the parent concept, but I don’t think I can (nest them, that is).

contents: All documents inside a database
parents: All containers (e.g. groups, tags or feeds) in a database
records: Basically identical to children of root.