-int gedcom_write_user_str(Gedcom_write_hndl hndl, int level, char* tag,
- char* xrefstr, char* value);
-int gedcom_write_user_xref(Gedcom_write_hndl hndl, int level, char* tag,
- char* xrefstr, struct xref_value* val);
+int gedcom_write_user_str(Gedcom_write_hndl hndl, int level, const char* tag,
+ const char* xrefstr, const char* value);
+int gedcom_write_user_xref(Gedcom_write_hndl hndl, int level, const char* tag,
+ const char* xrefstr, const struct xref_value* val);