[step-manufacturing] Reminder: UUID call - new EXPRESS key words for digital twinning

[Martin Hardwick]

See below for an example of the new EXPRESS


Topic: UUID Management
Time: Oct 4, 2023 09:30 AM Eastern Time (US and Canada)
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IDENTIFIED ENTITY Drill_and_fill_twin
SUBTYPE OF (Manufacturing_feature_twin);
hole_in_place: BOOLEAN;-- in-place means is on the wing
pilot_hole_in_place: BOOLEAN;
tack_in_place: OPTIONAL AGGREGATION Product_view_twin;
fastener_in_place: OPTIONAL AGGREGATION Product_view_twin;
   collar_in_place: OPTIONAL AGGREGATION Product_view_twin;
washer_count: OPTIONAL count_measure;
sealed      : OPTIONAL AGGREGATION Product_view_twin;
engineering_fit      : OPTIONAL hole_class;
disposition      : drill_and_fill_condition;
true_location      : COMPOSITION geometric_tolerance_twin;
true_size: COMPOSITION dimensional_size_twin;
true_form      : OPTIONAL COMPOSITION geometric_tolerance_twin;
WHERE
  WR1: true_location.prototype ISA position_tolerance;
  WR2: true_size.prototype ISA diameter_size_tolerance;
  WR3: true_form.prototype ISA roundess_tolerance OR cylindricity_tolerance
END_ENTITY;

The keyword IDENTIFIED is used for entities that have a (UUID) identity 
independent of the product model.

The keyword COMPOSITION is used to denote an existence dependency 
between two entities that have identity.

The keyword AGGREGATION is used to denote an accumulation of one 
identified entity within another identified entity.

-- 
Martin Hardwick
President STEP Tools, Inc.
Cell: 518 253-0596
"There are billions of STEP files and millions of STEP-NC files"
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