• Data reference period
• Geographic localization (Município - Agrarian region/ island)

• AGRICULTURAL HOLDING:  Technical-economic unit that uses common production factors such as labour, machinery, facilities, land, among others, fulfilling the following four conditions: 1) yield agricultural products or maintain, in good agricultural and environmental conditions, the lands that are no longer used for productive purposes; 2) reach or exceed a certain size (in area or number of animals); 3) be subject to a single management; 4) be located in a well-defined and identifiable area.
• SHEEP MILK:  A ewe which is kept exclusively or principally to produce milk for human consumption and/or for processing into dairy products.
• REFERENCE PERIOD:  The length of time for which data are collected, e.g. a specific day, month or year.
• MILK EWE-LAMBS PUT TO THE RAM:  Young ewe mated for the first time, which is milked regularly after the birth and weaning of her lambs.

Total number of milk sheeps livestock/ Total number of agricultural holdings with milk sheeps livestock