Each entry in the name generation table must contain the following required fields:

• Pointer to the control block for the next entry in the table

  Chaining the entries allows for variable length control blocks and minimizes storage requirements.

• ID code

  This code is the block ID that the entry represents.

If the ID code is nonzero, the following fields are also required for the table entry:

• PU station address, or 0
• Name prefix character
• PU model name

The extension bit must be turned on in the BEGIN vector, or VTAM® will use the old length. In addition, the following optional overrides for Model Major Node definition of a PU can be specified and requested:

• MAXDATA
• MAXOUT

If the block ID is 0, the entry is considered not valid and is not used. If the block ID is nonzero, it is assumed that the remainder of the entry contains valid data. An LU subentry must contain the following required fields:

• LU model name
• LU local address
• Subentry duplication factor

The extension bit must be turned on in the BEGIN vector, or VTAM will use the old length. In addition, the following optional overrides for Model Major Node definition of an LU subentry can be specified and requested:

• Default LOGMODE name
• LOGTAB—Interpret table
• MODE table
• LOGAPPL value
• USS table