Once more, with feeling. Nice explanation of "why it is IMPOSSIBLE to have a single ontology (top or NOT) as soon as two separate entities (groups or individuals, no matter) claim to rely on it." In a line, "no two people or groups share ALL theirs purposes and views!" This is why we need RDF, this is why we need to be able to import name-spaces on the fly, and this is why there can never be one standard for learning object metadata.
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