Abstract: A method, apparatus and article of manufacture provide for displaying per-instance dynamic properties of an object. A reference to an object instance having a dynamic property that is supplied at runtime for the object instance on a per-instance basis and is not stored with the object is received. A reference to a property source instance, that maintains knowledge of the dynamic property, associated with the object, is retrieved. The references are provided to a control that retrieves and displays the dynamic property. Additionally, the object may provide/specify a custom ActiveX control that defines a user interface for displaying and editing one or more properties. The custom control is instantiated and used to display the property in the defined user interface.

Abstract: A first block represents a two or three dimensional object in a Computer Aided Design (CAD) model, and has a visual presentation in a presentation of the CAD model based on a first plurality of property values denoted by a first label in a plurality of labels. User input specifying a new value for a first property value in the first plurality of property values is received. A second plurality of property values denoted by a second label is selected. The second plurality of property values differs by at least one value from the first plurality of property values and the second plurality of property values has a second property value that is satisfied by the new value. The visual presentation of the first block is updated based on the second plurality of property values.

Abstract: A method, apparatus and article of manufacture provide for displaying per-instance dynamic properties of an object. A reference to an object instance having a dynamic property that is supplied at runtime for the object instance on a per-instance basis and is not stored with the object is received. A reference to a property source instance, that maintains knowledge of the dynamic property, associated with the object, is retrieved. The references are provided to a control that retrieves and displays the dynamic property. Additionally, the object may provide/specify a custom ActiveX control that defines a user interface for displaying and editing one or more properties. The custom control is instantiated and used to display the property in the defined user interface.