expect_valid_table      Test for a valid table
getMetadata             Derive metadata from a schema description
getNames                Determine the names from a schema description
makeSchema              Make a schema description
reorganise              Reorganise a table
schema-class            The 'schema' class (S4) and its methods
schema_default          Default template of a schema description
selectData              Select data chunks from a spreadsheet
show,schema-method      Print the 'schema'
updateSchema            Check schema description for consistency
