Using XPath functions in the BPEL Process manager

When using XPath expressions in XSLT, and you want to use one of the following functions:
- getProperty(propertyName as string)
- setCompositeInstanceTitle(titleElement)
- getComponentInstanceID()
- getComponentName()
- getCompositeInstanceID()
- getCompositeName()
- getECID()
You can use these in the Oracle Mediator XSLT mapper only, and not Oracle BPEL Process Manager. For Oracle BPEL Process Manager, you have to use an assign activity.