SC_CALLBACK_REG

This message takes four forms: ADD_CLIENT, REMOVE_CLIENT, ADD_EVENTS, and REMOVE_EVENTS.

Each of these forms contains the following information:

• Protocol version

• Callback port in ASCII format (not binary format)

ADD_CLIENT, ADD_EVENTS, and REMOVE_EVENTS also contain an unbounded list of event types.

Each of these forms includes the following information:

• Event class

• Event subclass (optional)

• List of the name and value pairs (optional)

Together, the event class and event subclass define a unique “event type.” The document type definition (DTD) from which the classes of SC_CALLBACK_REG are generated is SC_CALLBACK_REG. This DTD is described in more detail in Appendix F, Document Type Definitions for the CRNP.

SC_REPLY

This message contains the following information: 

• Protocol version

• Error code

• Error message

The DTD from which the classes of SC_REPLY are generated is SC_REPLY. This DTD is described in more detail in Appendix F, Document Type Definitions for the CRNP.

SC_EVENT

This message contains the following information: 

• Protocol version

• Event class

• Event subclass

• Vendor

• Publisher

• Name and value pairs list (0 or more name and value pair data structures)

  • Name (string)

  • Value (string or string array)

The values in an SC_EVENT are not typed. The DTD from which the classes of SC_EVENT are generated is SC_EVENT. This DTD is described in more detail in Appendix F, Document Type Definitions for the CRNP.