http://digilab.ptb.de/vocab/http://digilab.ptb.de/vocab/skos/66251intrinsic error http://digilab.ptb.de/vocab/skos/66251 basic terms BT http://digilab.ptb.de/vocab/skos/66251 durability error RT http://digilab.ptb.de/vocab/skos/66251 fault RT http://digilab.ptb.de/vocab/skos/66251 initial intrinsic error RT http://digilab.ptb.de/vocab/skos/66251 reference conditions RT http://digilab.ptb.de/vocab/skos/66251 error of indication RT