There are two ways to specify a namespace binding in the configuration:

Command line (long):	--binding prefix=uri
Command line (short):	-bprefix=uri
Ant task:	<calabash> <namespace prefix="prefix" uri="uri" /> </calabash>

These bindings apply (only) to the options, parameters, and step names (if any) specified on the command line or in the Ant task. For convenience, the prefix “p” is bound to the XProc namespace by default.

Namespaces in the XML configuration are bound by the normal, XML means.