struct relevance *relevance_create(NMEM nmem, const char **terms, int numrecs);
void relevance_newrec(struct relevance *r, struct record *rec);
void relevance_countwords(struct relevance *r, struct record *rec,
struct relevance *relevance_create(NMEM nmem, const char **terms, int numrecs);
void relevance_newrec(struct relevance *r, struct record *rec);
void relevance_countwords(struct relevance *r, struct record *rec,