Should UML Have a Single Semantics? Should UML Have a Single <i>Core</i> Semantics?

John Howse Shusaku Iida Richard Mitchell Bernhard Rumpe Should UML Have a Single Semantics? Should UML Have a Single <i>Core</i> Semantics? 41-44 1999 conf/ecoopw/1999 ECOOP Workshops db/conf/ecoopw/ecoopw99.html#HowseIMR99