data structure in a or several files definition of a data document: can contain several data table (in several files) set of one or sereral data files definition of a file set of data contained in a file or spreadsheet type of file format : text or workbook , the only file format supported. Orientation of the data table : horizontal (default) - vertical structure of data: can be composed of several table set of data tables (at least one) Format of data : tabular or worksheet structure of datatable: can have a header data file strucuture definition Header list Structure: contains item set of header items, describing the table structure Rule for checking: using pattern to identify items regulax expression used for identification description of the rule, will be displayed in the tool Cardinality of an item or value in a field Represent by a minimal occur and a maximal Definition for the subname of the item list of constraints, that should match the item subname an header item with characteristic of it for checking list of relax rules: relax checking mode, the different possibilities for the item a unique rule, exactly matching the specification name of the item type exact name, according to the specification, that should have the item characterics of associated fields Cardinality of the item in the table header (how many time it is supposed to be present in the header) Cardinality of associated field in the table (how many time it is supposed to be present in a row) Location of the item in the header if multiplicity of values in a associatd field separator of values in a field, if multiplicity possible innerseparator of values in a field, if a value can contained several data defines dependance between field Specifies the field value type and constraints type of the field value : : a free text, a controlled vocabulary, a date... type of the subname of a header item : a database tag, a group tag, e... type of the field value : : a free text, a controlled vocabulary, a date... list of header item of data table contained in a file