AT:

• new tab on properties panel for every bpmn element called "Extensions"
• it is possible to model a list (table) of name/value pairs
• the xml looks like this (example)

<serviceTask... >
<extensionElements>
<camunda:properties>
<camunda:property name="foo" value="string1">
<camunda:property name="faa" value="string2">
<camunda:property name="fii" value="string3">
...