Cardinality of schema.org properties

I'm trying to determine how to know what the intended cardinality of any
given schema.org defined property.

Some (such as "name" and "url") appear to be defined in English as appearing
at most once.  Semantically, having them appear multiple times would appear
problematic.

Some, such as "tracks", appear to be explicitly defined as multivalued and
indeed need an ordering (see also
http://lists.w3.org/Archives/Public/public-html-data-tf/2011Oct/0004.html).


Is this a correct interpretation?  How would one determine whether something
is potentially multivalued or not based on the spec?

--
John Panzer / Google
jpanzer@google.com / abstractioneer.org <http://www.abstractioneer.org/> /
@jpanzer