001/*
002 * JScience - Java(TM) Tools and Libraries for the Advancement of Sciences.
003 * Copyright (C) 2006 - JScience (http://jscience.org/)
004 * All rights reserved.
005 * 
006 * Permission to use, copy, modify, and distribute this software is
007 * freely granted, provided that this notice is preserved.
008 */
009package javax.measure.quantity;
010import javax.measure.unit.SI;
011import javax.measure.unit.Unit;
012
013/**
014 * This interface represents the measure of the quantity of matter that a body
015 * or an object contains. The mass of the body is not dependent on gravity
016 * and therefore is different from but proportional to its weight.
017 * The system unit for this quantity is "kg" (kilogram).
018 * 
019 * @author  <a href="mailto:jean-marie@dautelle.com">Jean-Marie Dautelle</a>
020 * @version 1.0, January 14, 2006
021 */
022public interface Mass extends Quantity {
023
024    /**
025     * Holds the SI unit (Système International d'Unités) for this quantity.
026     */
027    public final static Unit<Mass> UNIT = SI.KILOGRAM;
028
029}