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I'm not sure why the committee didn't go this route. Perhaps they felt it was more consistent to have a "complete" set of computed constructors.
Section 2 has been reorganized and a new subsection "Processing Model" has been introduced.
Concerning the access protocol, they may be provided by the same platform – e.g.
Therefore any general purpose language can be used in order to accomplish tasks of data integration.
A value provides similar functionality, without the extra concept of an implementation-defined input sequence.
There are also various minor changes to the grammar or the formal semantics.