Clarification of EC extension table

The table 'EC Extension table' [1] does not make clear the semantics of

    intersectionOf()

(with an empty list of descriptions) I suspect the answer is O; in which
case it may be clearer to interpret

    intersectionOf(c1 ... cn)

as

    O \cap EC(c1) \cap ... \cap EC(cn)

Not a typo, this one, just a clarification.



[1] http://www.w3.org/TR/owl-semantics/direct.html#3.2

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