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Category Archives: SemWeb Quality

What is Data Quality?

There are several different opinions and definitions on what data quality is supposed to be. Most of the time, we adapt the “fitness for use by data consumers” definition as defined by Richard Wang and Diane Strong [1] who investigated the subjective quality perception of data quality by data consumers. Although this research work has […]

Data Quality Constraints for the Semantic Web

Today, I have published a SPARQL query library that contains generic queries for the identification of certain type of data quality problems, namely syntax violations, functional dependency violations, illegal values, uniqueness violations, value range violations, and missing values. The constraints library is based on the SPIN framework. In conjunction with SPIN it facilitates the easy […]