pp2_charset_t pp2_charset_create_xml(xmlNode *xml_node);
pp2_charset_t pp2_charset_create(struct icu_chain * icu_chn);
void pp2_charset_destroy(pp2_charset_t pct);
+void pp2_charset_incref(pp2_charset_t pct);
pp2_relevance_token_t pp2_relevance_tokenize(pp2_charset_t pct,
const char *buf);