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Model/calc_tuples.gms
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.. index:: tuples

**Tuples** are used to replace a large set of conditions in the equations of the model.

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Comments
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FeedReg_Tuple = if a certain product can be used to feed the livestock.

Supply_TupleA = if a certain product can be produced.

Supply_TupleB = if we have the necessary production information from FAO (prod quantity and price).

Supply_Tuple = if a certain product can be produced, both primary and processed in a region.

Demand_Tuple(REGION,Product) = if a certain product can be consumed in a region.

TCost = International trade costs.

ILRI

Product_Tuple = if a product can be either produced or consumed in a region
i.e. if there is a regional market for this product.