+void free_content (CT);
+char *ct_type_str (int);
+char *ct_subtype_str (int, int);
+const struct str2init *get_ct_init (int);
+const char *ce_str (int);
+const struct str2init *get_ce_method (const char *);
+int parse_header_attrs (const char *, int, char **, CI, int *);