ISO 10303-214:2010(E)
A Process_operation_resource_assignment is a mechanism to associate a resource with a Process_operation_occurrence.
The data associated with a Process_operation_resource_assignment are the following:
The operation specifies the Process_operation_occurrence with which the resource is associated.
See process_operation_resource_assignment to process_operation_occurrence for the application assertion.
The placement specifies the geometrical Transformation between the local coordinate system of the Process_operation_resource_assignment and the reference coordinate system.
NOTE The reference coordinate system is either the coordinate system of the reference tool (if present) for the concerned Process_operation_definition or (if no reference tool is present) the coordinate system of the Process_operation_definition itself.
In the case where the value of the attribute reference_tool is 'true', no transformation shall be defined.See process_operation_resource_assignment to transformation for the application assertion.
The placement need not be specified for a particular Process_operation_resource_assignment.
The reason specifies the rationale behind the use of the resource for a particular Process_operation_occurrence.
See process_operation_resource_assignment to multi_language_string for the application assertion.
The reason need not be specified for a particular Process_operation_resource_assignment.
If present, there shall be exactly one object that defines the reason for a Process_operation_resource_assignment.
The reference_tool specifies whether or not the resource identified by the Process_operation_resource_assignment plays the role of the reference tool for the occurrence of an operation.
In the case where the value of this attribute is 'true', all geometric transformations within the scope of the Process_operation_occurrence are defined with respect to the local coordinate system of the resource identified by the Process_operation_resource_assignment. There must not be more than one resource playing the role of the reference tool for one Process_operation_occurrence.
In the case where the resource is not represented as a Design_discipline_item_definition the value of the reference_tool shall be 'false'.
The resource_definition specifies the tool that is used to perform the operation.
See process_operation_resource_assignment to descriptive_specification, process_operation_resource_assignment to design_discipline_item_definition, process_operation_resource_assignment to item_instance, process_operation_resource_assignment to physical_instance, and process_operation_resource_assignment to product_component for the application assertions.
There shall be exactly one object that defines the resource_definition for a Process_operation_resource_assignment.
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