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Sorry - did not mean to imply that - I know better - user spaces are made from space objects, so are files. Or at least there is some common element down deep, IRRC. Or do we call the basic building blocks segments?

Simon Coulter wrote:
On 18/12/2009, at 9:41 AM, Vern Hamberg wrote:

User spaces are primary objects used on the iSeries - physical files,
e.g., comprise several spaces, each of which has a maximum size of 16meg
- it's how it has been, and a change here might be difficult to work
through all the interstices of the OS.

Umm, that implies *FILE objects are made up of user spaces which is incorrect. *FILE objects contain many spaces but none of them (at least last time I looked) are user spaces. User spaces are a particular sub-class of the general space object.

An object of type x'19' is a space. User spaces are type x'19' subtype x'34'.

A *FILE may contain (or reference) the following space objects:
o File object (x'1901')
o Format space (x'1951')
o Format sharing directory (x'1950')

In addition, it may contain (or reference):
o Cursor object (x'0D50')
o Data space (x'0b90')
o Data space index (x'0c90')

Note that a data space (where the records are stored) is a different class of object (type x'0b') from a space (type x'19').

Note also that this list is neither exhaustive or definitive.

Regards,
Simon Coulter.
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