The system service definitions can be notated, in any order, in either the set, command, putenv, or dcputenv format. Any of these formats are stored in the same definition file. But within a single definition, follow the order of set format, command format, putenv format, and dcputenv format.

With a set format, the specified value is determined at startup of the OpenTP1 system. The same applies to a command format, but the value determined at startup can be changed during an on-line session by entering an operating command. The putenv format and the dcputenv format enable an environment variable to be set.

Commands for system service definitions are described as definitions. Accordingly, restrictions differ on the use of a command as an actual operating command or as an option. For details, see the manual OpenTP1 Operation.

The network communication definitions can be notated in any order, but the order of notation within any one definition is fixed. See 5. Network Communication Definitions for details.

For details about a protocol, see the applicable OpenTP1 Protocol manual.

For the rules of the message queue definition (MQT communication configuration definition), see the OpenTP1 TP1/Message Queue User's Guide.

For the rules of the network library definition (TP1/NET/OSI-TP-Extended definition), observe the specifications of TP1/NET/OSI-TP-Extended.

The definition information can be maintained using a text editor. However, do not change or delete the definition that is being used online. If a definition is changed or deleted during an online operation, that operation is not guaranteed.

The changes made in some definitions can be reflected in OpenTP1 by entering the dcreset command after OpenTP1 is terminated. This eliminates the need to delete a registered definition or re-register a definition using the dcsetup command.

For details about the dcreset command, see 7.1 Procedures.

When the same operand can be specified in the system common definition, user service default definition, and user service definition, the priority is as follows (1. > 2. > 3.):

1. User service definition
2. User service default definition
3. System common definition