code: public static String[] getDataResources(String datatypeKey)
      {
         	Set<String> locations = new HashSet<String>();
      	Datatype datatype = getDatatype(datatypeKey);
  		for (Resource resource : getResources(datatype)) {
  			String link = resource.getDataResource();
  			locations.add(link);
  		}
      	return locations.toArray(ARRAY_OF_STRINGS);
      }
docs: Retrieves home page URLs of a datatype.
  
  @param datatypeKey - name (can be a synonym), ID, or URI (URL or URN) of a data type
  @return array of strings containing all the address of the main page of the resources of the data type
  
  @throws IllegalArgumentException when datatype not found