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2. Domain Entities 2.3. Parts2.3.2. Properties79• Endurants have properties.2.3.2. Properties– Properties are∗ what makes up a parts (and materials) and,∗ with property values distinguishesone part from another part andone material from another material.– We name properties.∗ Properties of parts can be given distinct names.∗ We let these names also be the property type name.∗ Hence two parts of the same part typehave the same set of property type names.A Precursor for Requirements Engineering 79 c○ Dines Bjørner 2012, DTU Informatics, Techn.Univ.of Denmark – July 20, 2012: 12:33
802. Domain Entities 2.3. Parts2.3.2. Properties• Properties are all that distinguishes parts (and materials).– The part type (i.a., material type)in itself does not express properties.– It expresses a class of parts (respectively materials).– All parts (materials) of the same type– have the same property types.– Parts (materials) of the different typeshave different sets of property types,c○ Dines Bjørner 2012, DTU Informatics, Techn.Univ.of Denmark – July 20, 2012: 12:33 80 Domain Science & Engineering
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