public boolean equals(Object object) {
        if (! (object instanceof Sorting)) return false;

        Sorting other=(Sorting)object;
        return this.locale.equals(other.locale) &&
               (ascending == other.ascending) &&
               (function == other.function) &&
               (strength == other.strength);
    }
A search-time document attribute sort specification(per-document in-memory value).
This belongs to the attribute or field(implicitt attribute).

@author baldersheim
config-model/src/main/java/com/yahoo/schema/document/Sorting.java