No absolutes with metadata – all relative to what you need to do with your data. Can be very different for different applications.
Data facilitates information gathering. It can highlight information, as in the use of facets, or topic maps. These are connections that cannot be done manually in a reasonable amount of time, and therefore are connections that users do not see without the help of machines.
It is the opposite of the closed world assumption, which holds that any statement that is not known to be true is false.
“ The open world assumption (OWA) is used in knowledge representation to codify the informal notion that in general no single agent or observer has complete knowledge, and therefore cannot make the closed world assumption.”
DLF Forum, Nov. 2, 2011
Things with relationships to other things Thing Thing Relationship DLF Forum, Nov. 2, 2011
Things with relationships to other things Thing Thing Relationship Subject Predicate (verb) Object DLF Forum, Nov. 2, 2011
object can be URI or "string" URI is a thing some examples: book -- has author – [lcname#] book -- has author -- "John Doe" Subject and Predicate Must be URIs DLF Forum, Nov. 2, 2011