Knowledge Advisor - catia

About ParametersWhen you create a part like the hollow cylinder of our "Getting Started" example, you often start by creating a sketch, thenyou create a pad by extruding the initial sketch, then you add other features to the pad created. The final document is madeup of features which define the intrinsic properties of the document. Removing one of these features results in a modificationof the document. These features are called parameters. Parameters play a prominent role in knowledgeware applications.They are features that can be constrained by relations and they can also be used as the arguments of a relation.In addition to these parameters, CATIA allows you to create user parameters. These user parameters are extra pieces ofinformation added to a document.User Parameter TypesUser parameters can be of various types:RealIntegerStringBooleanLengthAngleTimeMassVolumeDensityAreaMoment of inertiaEnergyForceUser parameters are very handy in knowledgeware applications:they can be used to add specific information to a documentthey can be defined or constrained by relationsthey can be used as the arguments of a relation.InertiaMass flow rateMomentPressureAngular stiffnessTemperatureLinear massLinear stiffnessVolumetric flow rateFrequencyElectric powerVoltageElectric resistanceElectric intensityA given relation may take as its arguments both types of parameters (intrinsic and user).User parameters can be assigned single or multiple values.Displaying Parameters in the Specification TreeThe user parameters are displayed in the specification tree only if the Tools->Options->Part->Display->Parameters box ischecked. The user parameter list contains at least the Material parameter. Its initial value is set to None.