>> but I think we should not add a TRANSIENT attributes for ES3, >> DONTENUM should be enought and backward compatible > > See http://wiki.ecmascript.org/doku.php?id=proposals:enumerability If we added the ability to set attributes, the propertyIsEnumerable extra parameter proposal would be unnecessary (albiet convenient). Also, IMHO, transient and dontenum are different concepts. They both affect enumeration, but one in the context of introspection and one in the context of serialization. Kris
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