void pp2_relevance_token_destroy(pp2_relevance_token_t prt);
const char *pp2_relevance_token_next(pp2_relevance_token_t prt);
const char *pp2_get_sort(pp2_relevance_token_t prt);
+const char *pp2_get_display(pp2_relevance_token_t prt);
#if 0
typedef int pp2_charset_normalize_t(pp2_charset_t pct,