Occurrence constants are misspelled

[raner]

The constants for occurrence constraints are all missing a second r. As these constants are already part of public API and cannot be changed without breaking backwards compatibility, it's probably best to deprecate the misspelled ones and add new ones with proper spelling and the same values:

+   public final short OCCURRENCE_ZERO_OR_MORE = 0;
+
+   @Deprecated
    public final short OCCURENCE_ZERO_OR_MORE = 0;
+
+   public final short OCCURRENCE_ONE_OR_MORE = 1;
+
+   @Deprecated
    public final short OCCURENCE_ONE_OR_MORE = 1;
+
+   public final short OCCURRENCE_ZERO_OR_ONE = 2;
+
+   @Deprecated
    public final short OCCURENCE_ZERO_OR_ONE = 2;
+
+   public final short OCCURRENCE_ONCE = 3;
+
+   @Deprecated
    public final short OCCURENCE_ONCE = 3;