(subclass VisualAttribute PerceptualAttribute) | Merge.kif 17664-17664 | Visual attribute is a subclass of perceptual attribute |
(subclass ColorAttribute VisualAttribute) | Merge.kif 17682-17682 | Color attribute is a subclass of visual attribute |
(subclass GUElementState VisualAttribute) | ComputerInput.kif 1876-1876 | GU element state is a subclass of visual attribute |
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