There’s a fascinating modeling discussion going on over on the DC-RDA list about whether RDA properties should reference literals or resources in descriptions. For example when describing an author you could use a literal:
Twain, Mark, 1835-1910
or a resource:
http://lccn.loc.gov/n79021164
There are some shades of gray in between (using blank nodes, auto-generated URIs, typed literals) but that’s the [...]
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