ShaderNodeDefinitions{
    ShaderNodeDefinition OneMinus {      
        Type: Fragment
        Shader GLSL100: Common/MatDefs/ShaderNodes/Math/oneMinus.frag
        Documentation{
            return 1 - value
            @input value a float  
            @output outFloat the resulting value
        }
        Input {
            float value       
        }
        Output {
            float outFloat
        }
    }
}