Specific for route compatibility check on French network. The allowed values for this property belong to the SKOS Concept Scheme http://data.europa.eu/949/concepts/train-detection/FrenchTrainDetectionSystemLimitations. Deprecated because of replacement by a class, an object property and two datatype properties. The reason is that the property is composed of two values: A boolean [Y/N] and a number N is between 1 and 8.