Proposal for p:variable

instead of this

subpipeline = (p:for-each<http://www.w3.org/XML/XProc/docs/alternate/#p.for-each>
|p:viewport <http://www.w3.org/XML/XProc/docs/alternate/#p.viewport>|
p:choose <http://www.w3.org/XML/XProc/docs/alternate/#p.choose>|p:group<http://www.w3.org/XML/XProc/docs/alternate/#p.group>
|p:try <http://www.w3.org/XML/XProc/docs/alternate/#p.try>|p:*atomic*<http://www.w3.org/XML/XProc/docs/alternate/#p.atomic>
|*pfx:user-pipeline* <http://www.w3.org/XML/XProc/docs/alternate/#p.atomic>|
p:documentation|p:pipeinfo|p:variable)*

can we try

subpipeline = (p:variable|p:documentation|p:pipeinfo)*,(p:for-each<http://www.w3.org/XML/XProc/docs/alternate/#p.for-each>
|p:viewport <http://www.w3.org/XML/XProc/docs/alternate/#p.viewport>|
p:choose <http://www.w3.org/XML/XProc/docs/alternate/#p.choose>|p:group<http://www.w3.org/XML/XProc/docs/alternate/#p.group>
|p:try <http://www.w3.org/XML/XProc/docs/alternate/#p.try>|p:*atomic*<http://www.w3.org/XML/XProc/docs/alternate/#p.atomic>
|*pfx:user-pipeline* <http://www.w3.org/XML/XProc/docs/alternate/#p.atomic>|
p:documentation|p:pipeinfo)*

Mohamed

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