ICU-8053 add link to the LDML spec, C.11 Language Plural Rules

X-SVN-Rev: 29928

icu4c/source/i18n/unicode/plurrule.h

@@ -42,13 +42,17 @@ class RuleParser;
 class PluralKeywordEnumeration;
 
 /**
- * Defines rules for mapping positive long values onto a small set of
+ * Defines rules for mapping non-negative numeric values onto a small set of
  * keywords. Rules are constructed from a text description, consisting
  * of a series of keywords and conditions.  The {@link #select} method
  * examines each condition in order and returns the keyword for the
  * first condition that matches the number.  If none match,
  * default rule(other) is returned.
  *
+ * For more information, details, and tips for writing rules, see the
+ * LDML spec, C.11 Language Plural Rules:
+ * http://www.unicode.org/draft/reports/tr35/tr35.html#Language_Plural_Rules
+ *
  * Examples:<pre>
  *   "one: n is 1; few: n in 2..4"</pre>
  *  This defines two rules, for 'one' and 'few'.  The condition for