Defining an administrative topic

Use the MQSC command DEFINE TOPIC to create an administrative topic. When defining an administrative topic we can optionally set each topic attribute.

Any attribute of the topic that is not explicitly set is inherited from the default administrative topic, SYSTEM.DEFAULT.TOPIC, that was created when the system installation was installed.

For example, the DEFINE TOPIC command that follows, defines a topic called ORANGE.TOPIC with these characteristics:

• Resolves to the topic string ORANGE. For information about how topic strings can be used, see Combining topic strings.
• Any attribute that is set to ASPARENT uses the attribute as defined by the parent topic of this topic. This action is repeated up the topic tree as far as the root topic, SYSTEM.BASE.TOPIC is found. For more information, see Topic trees.

DEFINE TOPIC (ORANGE.TOPIC) +
TOPICSTR (ORANGE) +
DEFPRTY(ASPARENT) +
NPMSGDLV(ASPARENT)

Note:

• Except for the value of the topic string, all the attribute values shown are the default values. They are shown here only as an illustration. We can omit them if you are sure that the defaults are what you want or have not been changed. See also Displaying administrative topic object attributes.
• If you already have an administrative topic on the same queue manager with the name ORANGE.TOPIC, this command fails. Use the REPLACE attribute if you want to overwrite the existing definition of a topic, but see also Change administrative topic attributes.