signature        2301 dxref.c        	    char *signature = xmlGetProp (node, "signature");
signature        2304 dxref.c        		     name, href_macinfo (id, signature),
signature        2307 dxref.c        		     name, href_macinfo (id, signature),
signature        2311 dxref.c        		     href_macinfo (id, signature));
signature        2314 dxref.c        		     href_src1 (pathname, line2, signature),
signature        2321 dxref.c        	    xmlFree (signature);