This model represents measures as first class objects, that is, an object that encapsulates a number with its unit.
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Named after Aconcagua, the highest mountain in both the southern and western hemispheres. It is located in the Andes, in the Mendoza Pronvice, Argentina.

This representation allows the programmer to use measures in arithmetic expressions as if they were numbers, but with the advantage of providing explicit information to the system, specifically, the measures units. See http://dl.acm.org/citation.cfm?id=1094964 or http://stephane.ducasse.free.fr/Teaching/CoursAnnecy/0506-M1-COO/aconcagua-p292-wilkinson.pdf for more about this.

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