Proposal for changing foreach/viewport

For completeness, here's a proposal to "go the other way".

The following proposal changes p:for-each/p:viewport to remove the
syntactic inconsistency.

4.2.9 p:for-each Element

A p:for-each represents a for-each.

<p:for-each
   name=NCName
   port=QName
   step=step name
   select?=xpath expression>
   (p:declare-output*,
    p:declare-parameter*,
    subpipeline)
</p:for-each>

The input to the for-each must be bound with the port, step, and
select attributes. If outputs are declared, they must also include a
binding.
...

4.2.10 p:viewport Element

A p:viewport represents a viewport.

<p:viewport
  name=NCName
   port=QName
   step=step name
   select=xpath expression>
   (p:declare-output,
    p:declare-parameter*,
    subpipeline)
</p:viewport>

The input to the viewport must be bound with the port and step attributes.
A select attribute must be specified to identify the processed regions
of the input. Exactly one output must be declared and it
must include a binding.
...

                                        Be seeing you,
                                          norm

-- 
Norman Walsh
XML Standards Architect
Sun Microsystems, Inc.