Jason,

in release notes for IBO4 you wrote:

...
The most important new feature in Release 4 is horizontal dataset
refinement.
...
This can be implemented by using the POS attribute in the
OrderingLinks property. What used to be entered as this: MYCOL=1 is
now entered as MYCOL=ITEM=1;POS=0
...

Could you explain it?

What does "ITEM" mean? Is it a keyword or an example of index name?
And why "POS=0"? What does 0 mean? (Why not POS=1?)

Thanks

Richard