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vector

EXPRESS specification:

ENTITY vector
SUBTYPE OF ( geometric_representation_item);
orientation  :  direction;
magnitude  :  length_measure;
WHERE
WRV1  :  magnitude >= 0.0;
END_ENTITY;

References (4):

Name Type Referred through Express-G
geometric_representation_item Entity
Subtype
No Diagram
line Entity
Attribute 'dir'
No Diagram
surface_of_linear_extrusion Entity
Attribute 'extrusion_axis'
No Diagram
vector_or_direction Select
Select relation
No Diagram

Inheritance graph

ENTITY vector;
ENTITY representation_item;
name  :  label;
ENTITY geometric_representation_item;
DERIVE
dim  :  dimension_count :=  dimension_of(SELF);
ENTITY vector;
orientation  :  direction;
magnitude  :  length_measure;
END_ENTITY;