(subclass VisualAttribute PerceptualAttribute) | Merge.kif 17642-17642 | Visual attribute is a subclass of perceptual attribute |
(subclass ColorAttribute VisualAttribute) | Merge.kif 17660-17660 | Color attribute is a subclass of visual attribute |
(subclass GUElementState VisualAttribute) | ComputerInput.kif 1876-1876 | GU element state is a subclass of visual attribute |