A Block Management Package (BMP) is a generalised facility for managing tables of fixed length records. The BMP manages the commitment and decommitment of table storage and maintains a free a record list. ;p.The table is prefixed with a header structure (the VMBH) which facilitates the management of the BMP.

Typical examples of BMPs are:

The VMOB table.
The VMAL table.
The VMAR table.