rdfs:comment"length that is the average of the higher 1/3 of the wave heights passing during a sample period (typically 20 to 30 minutes) (source: MPR-XSD)"^^xsd:string;
rdfs:comment"The Transform Helper Schema is the set of properties and classes used for the creation of temporary data used as part of the ERH transformations. All instances of classes and uses of these properties is deleted before the triples are stored in the RDF database."^^xsd:string;