Rationale | The basics | How to make a schema description | Decision tree | Additional remarks | An example | Table types | Table contains one cluster | Tidy table | Mismatch of columns and variables | Implicit variables | Wide variables | Listed observed variables | Misplaced columns or rows | Table contains several clusters | Horizontal clusters | Vertical clusters | Clusters of observed variables | Clusters that are nested into another variable | Variables that are distinct from a cluster | Messy clusters | References