<a href="lookup">YARRG</a> -
Yet Another Revenue Research Gatherer
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-<a href="devel">development</a>
-|
<a href="intro">introduction</a>
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<b>documentation</b>
+|
+<a href="devel">development</a>
<h1>Looking up data in YARRG</h1>
<dd>The capacity of a war brig minus 1%
<dt>13t 20kl
<dd>13 tonnes (13,000kg), 20 kilolitres (20,000l)
-<dt>sloop - 100l 100kg
-<dd>The capacity of a sloop minus 100l, minus 100kg
+<dt>sloop - 10 small 40 rum
+<dd>The capacity of a sloop which remains after
+ 10 small shot and 40 rum are loaded
<dt>2t plus 500kg minus 200kg
<dd>2300kg, with no limit on volume
</dl>
<p>
-Formally, the capacity is a list of terms, all but the first preceded
-by one of <kbd>-</kbd>, <kbd>minus</kbd>, <kbd>+</kbd>,
-<kbd>plus</kbd>. Each term may specify a mass and/or a volume
-(separated by a space), as a number followed (without an intervening
-space) by a unit (<kbd>t</kbd>, <kbd>kg</kbd>, <kbd>kl</kbd> or
-<kbd>l</kbd>). Alternatively each term except the first may specify a
-percentage, which is applied as a percentage change to the answer from
-all the preceding terms. The first term may be a ship name or
-abbrevation instead. If the first term specifies only one of mass or
-volume, all the subsequent terms may only adjust that same value.
+More formally:
+<pre>
+ capacity-string := [ first-term term* ]
+ term := ('+' | '-' | 'plus' | 'minus') (value+ | number'%')
+ value := mass | volume
+ | integer commodity-name-or-abbreviation
+ mass := number ('t' | 'kg')
+ volume := number ('kl' | 'l')
+ first-term := mass | volume | mass volume | volume mass
+ | ship-name-or-abbreviation
+</pre>
+
+If the first term specifies only one of mass or volume, all the
+subsequent terms may only adjust that same value.
<h3><a name="losses">Expected losses</a></h3>