In EventClass.py ...

...

def buildZProperties(self):
	edict = self.getDmdRoot("Events")
	edict._setProperty("zNewProperty", "default value")
	edict._setProperty("zNewIntegerProperty", -1, type="int")
	edict._setProperty("zNewFloatProperties", 10.01, type="float")
	edict._setProperty("zNewListProperty", ["default value", "another default value"], type="lines")
	edict._setProperty("zNewBooleanProperty", False, type="boolean")

...

Adding a new property to the EventClass is as easy adding a new line to the buildZProperties method. You need to set a new property at the "Events" level.

In DeviceClass.py

...

def buildDeviceTreeProperties(self):
	devs= self.getDmdRoot("Devices")

...

	devs._setProperty("zNewProperty", "default value")
	devs._setProperty("zNewIntegerProperty", -1, type="int")
	devs._setProperty("zNewFloatProperties", 10.01, type="float")
	devs._setProperty("zNewListProperty", ["default value", "another default value"], type="lines")
	devs._setProperty("zNewBooleanProperty", False, type="boolean")
...
...

Adding a new property to the DeviceClass is as easy adding a new line to the buildDeviceTreeProperties method. You need to set a new property at the "Devices" level.