In some passages there will be used the "activiti" namespace in the Bpmn 2.0 XML snippets, e.g.:

<serviceTask id="print" activiti:expression="#

{printer.printMessage()}

" />
(http://stage.docs.camunda.org/guides/user-guide/#!/#expression-language)

and in other passages of the documentation there will be used the "camundabpm" namespace in the Bpmn 2.0 XML snippets, e.g:

<serviceTask id="service1" name="Generate Invoice" camundabpm:class="my.custom.Delegate" camundabpm:async="true" />
(http://stage.docs.camunda.org/guides/user-guide/#!/#transaction-boundaries)

Unifiy the snippets to "camundabpm" namespace?