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18.43.        The system can handle both qualitative and quantitative indicators, micro- and macrodata, questionnaires, registers and unstructured data (documents), thus allowing broad integration. Infostat also adopts the Matrix model language, called EXL (expression language), to define expressions used in data validation and in data processing phases for calculations. EXL expressions are intuitive, as they are quite similar to spreadsheet formulas, and the language is conceived to be extensible, in order to support the great variety and variability of statistical requirements.


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[1] Vincenzo Del Vecchio, Fabio Di Giovanni and Stefano Pambianco, “The ‘Matrix’ Model:unified model for statistical data representation and processing”  (Banca d’Italia, 2007). Available from

[2] Fabio Di Giovanni, Daniele Piazza, “Processing and managing statistical data: a National Central Bank experience”, paper presented at the “International Statistical Conference”, Prague, 14-15 September 2009. Available from