+ int *index_type, const char **db,
+ const char **string_index);
+
+int zebraExplain_ord_adjust_occurrences(ZebraExplainInfo zei, int ord,
+ int term_delta, int doc_delta);
+
+zint zebraExplain_ord_get_term_occurrences(ZebraExplainInfo zei, int ord);
+zint zebraExplain_ord_get_doc_occurrences(ZebraExplainInfo zei, int ord);