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tutorials:vec_v1_4:documentation:3_3_instantiation_of_specifications_without_part_number [2016/05/12 14:27] (current)
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 +~~NOTRANS~~
 +[[..:​start|Index]] - [[3_2_instantiation_of_parts| Previous ]] - [[3_4_wires | Next ]] 
 +====== 3.3 Instantiation of Specifications without Part Number ======
 +{{map> ​ ..:​diagrams:​3_3_instantiation_of_specifications_without_part_number.jpg?​525x165 ​ }}
 +  * [[:​models:​vec_v1_1_2:​classes:​fixingrole|FixingRole @ 353,​129,​454,​155 ]]
 +  * [[:​models:​vec_v1_1_2:​classes:​fixingspecification|FixingSpecification @ 10,​122,​135,​156 ]]
 +  * [[:​models:​vec_v1_1_2:​classes:​partusage|PartUsage @ 318,​10,​516,​71 ]]
 +{{<map}}
 +<​html> ​  <​head> ​    </​head> ​  <​body> ​    <​p>​ As mentioned in the example before, there are use cases where it is necessary to define properties of component (instance), without having a concrete part number. This is quite common for example in the electrological design, where for example the cross section area of a wire is specified, but the colouring of the wire is not yet known. In these cases the requirements for component have to be defined without having a concrete <​i>​PartVersion</​i>​. ​    </​p> ​     <p> For these cases, the VEC offers the concept of <​i>​PartUsages</​i>​. A <​i>​PartUsage</​i>​ behaves like a <​i>​PartOccurrence</​i>​ (it has instance specific attributes and can define <​i>​Roles</​i>​),​ but it is not necessary to reference a PartVersion. Instead it is possible to directly reference the needed specifications,​ which represent the requirements on the concrete component, selected later in the process. ​     </​p> ​   </​body>​ </​html> ​
 +
 +----
 +
 +[[..:​start|Index]] - [[3_2_instantiation_of_parts| Previous ]] - [[3_4_wires | Next ]] 
 +~~DISCUSSION~~
  
tutorials/vec_v1_4/documentation/3_3_instantiation_of_specifications_without_part_number.txt · Last modified: 2016/05/12 14:27 (external edit)