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DITA 1.3 Featured Article: Understanding Scoped Keys in DITA 1.3
DITA 1.3 introduces scoped keys, which represent an extension of keys as introduced in DITA 1.2. In a nutshell, DITA 1.2 allowed for only one definition of a given key per root map. If you wanted your product-name key to be resolved as “Widget” in some topics and as “Gadget” in other topics, you’re out of luck.