| Datensystem | Nominativ, Singular | nominative case, singular | |
| Datensystem | Genitiv, Singular | genitive case, singular | |
| Datensystem | Dativ, Singular | dative case, singular | |
| Datensystem | Akkusativ, Singular | accusative case, singular | |
| Datensystemen | Nominativ, Plural | nominative case, plural | |
| Datensystemen | Genitiv, Plural | genitive case, plural | |
| Datensystemen | Dativ, Plural | dative case, plural | |
| Datensystemen | Akkusativ, Plural | accusative case, plural |