-dkMathSymbols.item["="] := "{u+2261}" ; (≡) identical to
-dkMathSymbols.item["+"] := "{u+2262}" ; (≢) not identical to
+dkMathSymbols.item["="] := "{u+225d}" ; (≝) equal to by definition
+dkMathSymbols.item["+"] := "{u+2295}" ; (⊕) circled plus
+dkMathSymbols.item[chr(0x00f5)] := "{u+2261}" ; (õ -> ≡) identical to
+dkMathSymbols.item[chr(0x00d5)] := "{u+2262}" ; (Õ -> ≢) not identical to