| AbsoluteExternalPositionalAccuracyImpl | Closeness of reported coordinate values to values accepted as or being true. | 
| ConformanceResultImpl | Information about the outcome of evaluating the obtained value (or set of values) against a specified acceptable
 conformance quality level. | 
| ElementImpl | Type of test applied to the data specified by a data quality scope. | 
| PositionalAccuracyImpl | Accuracy of the position of features. | 
| QuantitativeResultImpl | Information about the value (or set of values) obtained from applying a data quality measure. | 
| ResultImpl | Type of test applied to the data specified by a data quality scope. |