All schemas should define a prefix to be used when retrieving the property

Only the dublincore schema declares the "dc" prefix, all schemas should declare one.

One way to use the prefix when retrieving a property value would be:
getProperty("dc:title")
or getProperty("dublincore:title") for compatibility

When using complex properties:
"n:name.n:firstName" or "namespace.name.firstName for compartibility

When using lists:
"n:names#3.n:firstName" or "namespace.name#3.firstName for compatibility

This has to be consistent with restful urls generated (see NXP-1106) and jsf document resolver (that currently uses #

) even if some characters may be forbidden there.