+/* The following are utility functions. */
+const char *mdoc_arch2a(enum mdoc_arch);
+const char *mdoc_vol2a(enum mdoc_vol);
+const char *mdoc_msec2a(enum mdoc_msec);
+const char *mdoc_att2a(enum mdoc_att);
+enum mdoc_att mdoc_atoatt(const char *);
+const char *mdoc_st2a(int);
+int mdoc_isdelim(const char *);
+