• Data reference period (Quarter)
• Geographic localization (Portugal)
• Type of good, product by activity (CPA 2008)

• REGION OF ORIGIN:  Region, among the regions of the exporting Member State, where the goods were produced or were assembled, combined, processed, repaired or maintained; in its absence, the region of origin is the region where the marketing process took place or the region from which the goods were dispatched.
• GOOD:  Any material object produced and placed on the market.
• REFERENCE PERIOD:  Period to which the information refers and which may be a specific day or a time interval (month, fiscal year, calendar year, among others).
• IMPORT:  Physical movement of goods/merchandise out of the statistical territory a Member State to the statistical territory of another Member State or a third country.
• REGION OF DESTINATION:  Region, among the regions of the importing Member State, where the goods are to be consumed or undergo assembly, combination, processing, repair or maintenance operations; in its absence, the region of destination is replaced by the region where the marketing process is to take place, or by the region to which the goods are dispatched

Value index = [(Value N) / (Value N-1)]*100-100

N reference period in the year N

N-1 reference period in the previous year (N-1)