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

[Thomas Thurman]

Comment on IDENTIFIED keyword.
The ENTITY data type characterized_object is independent of the product model.
It is unclear what the interpretation is of your usage of the phrase in the use case you include below.
Best Regards,
Tom Thurman

> On Oct 2, 2023, at 10:47 AM, Martin Hardwick <hardwick at steptools.com> wrote:
> 
> See below for an example of the new EXPRESS
> 
> 
> Topic: UUID Management
> Time: Oct 4, 2023 09:30 AM Eastern Time (US and Canada)
>     Every 2 weeks on Wed, until Oct 18, 2023, 2 occurrence(s)
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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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