. "source feed"@en . . _:vb151414436 . "This is indeed not really needed. But it is useful for explaining the relation between the source element in rfc 4287 and the awol:entry relation. It has educational value." . . . _:vb151414460 . . "See \u00A74.2.11 of rfc 4287 spec. The source feed where the entry was found"@en . . "This relation is not strictly necessary."@en .