Member append_buf_str (buf_t *buffer, int size, unsigned char *data): questionable interface design
Member parse_segment (FILE *fd, hl7_meta_t *meta, node_t **fieldlist_p, unsigned char **segment_name): if crlf is -1 and the first 3 characters are not MSH, then we have to trust meta or stop here
Member raw_field_t: move into parser, this is not being used by the node facilities at all.