Most data collected in statistics and science is still stored in simple flat files, usually data matrices with rows identified by a case identifier (case_id), columns corresponding to attributes (variables), and numerical data types for the elements of each matrix due to coding of all attributes...

Most data collected in statistics and science is still stored in simple flat files, usually data matrices with rows identified by a case identifier (case_id), columns corresponding to attributes (variables), and numerical data types for the elements of each matrix due to coding of all attributes...

Rapide Fortschritte in der Netzwerk- und Speichertechnologie haben dazu geführt, dass Informationen über viele verschiedene Quellen wie z.B. Personal Computer oder Datenbanken verstreut sind. Weil diese Informationen oft auch sehr heterogen sind, wurde gleichzeitig die Entwicklung effektiver...