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doc/manual/source/language/expression/identifier.md

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+# Identifier Expression
+
+An identifier expression references a name bound in the lexical scope.
+
+```dcdl
+Port
+MyConfig
+mkConfig
+```
+
+## Evaluation
+
+An identifier evaluates the corresponding binding when its value is needed.
+If no such binding exists, evaluation produces an unresolved-identifier error.