class RequirementError(BaseException):
	pass

class NamespaceNotFound(BaseException):
	pass

class NamespaceError(BaseException):
	pass

class UnsupportedHardware(BaseException):
	pass

class InterfaceNotFound(BaseException):
	pass

class InterfaceError(BaseException):
	pass

class ResourceNotFound(BaseException):
	pass

class ResourceError(BaseException):
	pass