| Application module: Product replacement | ISO/TS 10303-1046:2006(E) © ISO | 
         (*
ISO TC184/SC4/WG12 N4360 - ISO/TS 10303-1046 Product replacement - EXPRESS ARM
Supersedes 
         ISO TC184/SC4/WG12 N1144
*)
         
SCHEMA Product_replacement_arm;
         USE FROM
         Assembly_structure_arm;
            -- ISO/TS 10303-1026
         USE FROM
         Product_identification_arm;
            -- ISO/TS 10303-1017
ENTITY Alternate_product_relationship;
           name : 
         OPTIONAL 
         STRING;
           description : 
         OPTIONAL 
         STRING;
           alternate_product : Product;
           base_product : Product;
           criteria : 
         OPTIONAL 
         STRING;
UNIQUE
           UR1: alternate_product, base_product;
WHERE
           WR1: alternate_product  :<>: base_product;
           WR2: EXISTS(criteria) OR (TYPEOF(SELF\Alternate_product_relationship) <> TYPEOF(SELF));
         
         END_ENTITY;
ENTITY Assembly_relationship_substitution;
           name : 
         OPTIONAL 
         STRING;
           description : 
         OPTIONAL 
         STRING;
           base_relationship : Assembly_component_relationship;
           substitute_relationship : Assembly_component_relationship;
UNIQUE
           UR1: base_relationship, substitute_relationship;
WHERE
           WR1: base_relationship.relating_view :=: substitute_relationship.relating_view;
           WR2: base_relationship :<>: substitute_relationship;
         
         END_ENTITY;
         END_SCHEMA;  -- Product_replacement_arm
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