autoExtend

Automatic extendibility (true/false)

uspcLibName

The library in which the user space is located. This is helpful when *LIBL or *CURLIB is specified as the library name in the qualified user space name parameter.

spaceSize

The size of the user space object in bytes.

InitialValue

The initial value to which future extensions of the user space will be set.

Zéro, space….