[step-manufacturing] AP-238 IS document for review

[David Loffredo]

I have just posted the (almost) final AP-238 IS document for review
and discussion in Tolouse. The normative main body of the document is
complete and ready for IS publication. The informative annexes in the
back still need a little more work (regenerate the ARM/AIM EXPRESS-G
diagrams in Annex G/H and add two more P21 examples to Annex K) before
the publication checklists are complete.

The files are available for interactive viewing at:

     http://www.steptools.com/library/stepnc/tech_resources/

You can also download a compressed zip file containing all of the
documents (8.5meg) from:

     ftp://ftp.steptools.com/private/ap238/ap238is_review.zip

This includes the AP document, issue resolution slides, issue log,
SEDS issues for TC184/SC1, AIM EXPRESS longform and shortform, and
short names.  A few notable changes are described below. See the issue
log and slides for complete details on all resolutions.

Best regards,
						- Dave

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The fundamental concepts and operations section (5.2.1) has been
significantly expanded with additional discussion and examples to
further clarifies the feature placements, use of measurements and
units, contexts, and toolpath curves.

In response to editorial comments, clause 4.2 has been reorganized
slightly to make the ARM easier to follow. It now contains entries for
all Application Objects so that it is easier to understand what AOs
are present and where they come from. Where an AO is imported from ISO
14649, the entry in 4.2 is a normative reference to the defining ISO
14649 document, but it includes an informative note with the EXPRESS
description and text directing the reader to the other document for
the definition and usage.

All mappings and references have been updated to match final published
ISO 14649 documents. For tools, ISO 14649 Parts 10/111/121 revised and
moved parameters from Tool_dimension and the Tool_body subtypes into
the machining_tool hierarchy.  The mapping tables needed some changes,
but the underlying AIM representation did not change much.

Parameters are still in a machining_tool_body_representation on the
machining_tool. The type of tool is now given by the description of
the machining_tool, rather than the name of the representation. The
machining_tool_dimension_representation AIM instance was eliminated.
The machining_cutting_corner_representation AIM instance was added to
handle the corner transition information added to Part 121.