[ [interface_attribute,...] ] interface interface_name

The interface definition header defines the interface name and its attributes.

interface_attribute

Defines interface attributes. The following attribute values can be specified:

• version:
  Specifies the interface version.
  
• pointer_default:
  Specifies the pointer semantics of the default value.
  
• transaction_mandatory:
  Specifies that the transaction must be expanded.
  
• transaction_optional:
  Specifies that the transaction is expanded for transaction processing.
  

The transaction_mandatory and transaction_optional attributes cannot be specified at the same time. Specify only one of them.

• Only one interface can be defined for one server.
• Specifying the uuid attribute is unnecessary. No error occurs even if the uuid attribute is specified. An error occurs, however, if the uuid attribute format is not conformed.
• The local attribute cannot be used. If used, an error occurs.
• The endpoint attribute cannot be used. If used, an error occurs.
• The transaction_mandatory and transaction_optional attributes are valid only if communicating processes are both ndce processes.