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Line 57: + − + − + − * multiple formulas are distinguished by a ";" − − Some remarks: − * not all 4 elements are always specified, eg 250 g means 1*250 g for the entire product − * sometimes more than one quantity is specified, e.g. 250 g (5x50 g) might mean 1x250g for the entire product OR 5 50g pots − * there are exceptions, such as multiple multipliers. − * naturally users do not use this formal approach, but most quantities can be translated to this approach.
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=== Practical usage ===
=== Practical usage ===
In practice however other indications are used by users. There is no best practice defined.
* to indicate times, either a "*" or a "x" can be used;
* to indicate times, either a "*" or a "x" is used;
* the generic formula is: multiplier * quantity size_unit for units
* equivalent formulas are distinguished by a ";" or brackates "(,)"
** multiplier indicates how often a quantity unit is used, i.e. 6 (25 cl bottles). This is a number.
** multiplier indicates how often a quantity unit is used, i.e. 6 (25 cl bottles). This is a number.
** quantity the size of the units in size_units, i.e. 25 (size) cl (size_unit) bottles (units). This is a number.
** quantity the size of the units in size_units, i.e. 25 (size) cl (size_unit) bottles (units). This is a number.
** size_units is the unit for the size parameter, i.e. kg, ml or cl. This is an enumerated?
** size_units is the unit for the size parameter, i.e. kg, ml or cl. This is an enumerated?
** unit is the element the numbers and sizes refer to, i.e. pot, bottle, sack, etc.
** unit is the element the numbers and sizes refer to, i.e. pot, bottle, sack, etc.
=== Test approach ===
=== Test approach ===