final String value) throws PropertyException {
final PropertyValue pv = standardParse(fobj, value);
if (pv.canEvalKeyword()) {
return pv;
}
if (pv.canEvalPercentage()
|| pv.canEvalLength()) {
return new DtLengthRange(true, pv, pv, pv);
}
throw unexpectedValue(value, fobj);
}