Examples of Message Data Element Formats for Multi-Buffer Messages

Figure 1 shows a queue of message data elements in which each element contains a buffer address and a pointer to the next element in the queue. All buffers reside in the same address space and are to be accessed using the ALET specified by the PARTALET parameter. All buffers are of the length specified by the PARTLEN parameter.

Figure 2 shows a table of message data elements in which each element includes the following information relating to the buffer it describes:

The ALET to qualify the buffer address
The length of the buffer
The address of the buffer.

Figure 3 shows a table of message elements in which each element contains a buffer. No ALETs are specified since the buffers reside in the table itself. A separate table, specified by PARTLENTBL, contains the length of each buffer.

Figure 4 shows a table of message elements in which each element contains a buffer address. A separate table, specified by PARTALETTBL, contains the ALETs to be used with each buffer address. A separate table, specified by PARTLENTBL, contains the length of each buffer.