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I've found the instanceof operator in JSF EL, but it throws an exception when used. It's obviously reserved but not implemented? When will it (probably) be available, if not already in a newer version than JSF 1.2, which I'm currently using?
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The keyword
instanceofis indeed reserved in the EL (see here), but it is still not used in the latest version of EL (2.2), used in JSF 2.x.