+YAZ_EXPORT char *nmem_strdupn (NMEM mem, const char *src, size_t n);
+YAZ_EXPORT void nmem_strsplit_blank(NMEM nmem, const char *dstr,
+ char ***darray, int *num);
+YAZ_EXPORT void nmem_strsplit(NMEM nmem, const char *delim,
+ const char *dstr,
+ char ***darray, int *num);
+