MARC 21 Format for Authority Data

National Level Requirements

8XX: Other Variable Fields

1999 Edition
Update No. 1 (October 2001) through Update No. 12 (October 2010)
856 ELECTRONIC LOCATION AND ACCESS                          O	
   $a  Host name                                            A
   $b  Access number	                                    A
   $c  Compression information	                            A
   $d  Path                                                 A
   $f  Electronic name	                                    A 
   $h  Processor of request                                 A
   $i  Instruction                                          O
   $j  Bits per second	                                    A
   $k  Password	                                            A
   $l  Logon	                                            A
   $m  Contact for access assistance	                    O
   $n  Name of location of host	                            A
   $o  Operating system	                                    A
   $p  Port                                                 A
   $q  Electronic format type	                            A
   $r  Settings	                                            A
   $s  File size                                            O
   $t  Terminal emulation                                   A
   $u  Uniform Resource Identifier                          A
   $v  Hours access method available	                    A
   $w  Record control number	                            O
   $x  Nonpublic note	                                    O
   $y  Link text                                            O
   $z  Public note                                          O
   $2  Access method	                                    A
   $3  Materials specified                                  A
   $6  Linkage	                                            A
   $8  Field link and sequence number	                    O

880 ALTERNATE GRAPHIC REPRESENTATION	                    A
   $a-z	         Same as associated field                   M
   $0-5, 7-9	 Same as associated field                   M
   $6	         Linkage                                    M