Indicator digits (856 xy) and selected subfield codes for field 856 Indicator digits Selected subfield codes Access method Second Relationship $a Host name (R) $g Uniform Resource name (R) # No information provided # No information provided $s File size (R) 0 Email 0 Resource $u Uniform Resource Locator (NR) 1 FTP 1 Version of resource $z Public note (R) 2 Remote login (Telnet) 2 resource $2 Access method (NR) 3 Dial-up 8 No display constant generated $3 Materials specified (NR) 4 HTTP $6 Linkage (NR) 7 Method specified in subfield $2 Marc format for authority records The field labels (tags) largely parallel those of the document format, particularly 000 - 099. 0xx Call numbers, control numbers 1xx, 4xx, and 5xx all use the following Includes, for example, class number(s) subdivision by type of entry, corresponding to a subject heading parallel to the MARC Format for Bibliographic Records 1xx Established headings 260 Complex reference (subject) x00 Personal name see 360 Complex reference (subject) x10 Corporate name see also 4xx reference [really x11 Meeting name See from type of relationship] 5xx reference x30 Uniform title See also from 6xx Series treatment information, notes x50 Topical term x51 Geographic name Fields 4xx and 5xx have a subfield that encodes the ≠w type of relationship, for example a Earlier heading, ≠w heading, ≠wb g Broader Term, ≠w h Narrower term. ≠w
Indicator digits (856 xy) and selected subfield codes for field 856 Indicator digits Access method # No information provided 0 Email 1 FTP 2 Remote login (Telnet) 3 Dial-up 4 HTTP 7 Method specified in subfield $2 Second Relationship # No information provided 0 Resource 1 Version of resource 2 resource 8 No display constant generated Selected subfield codes $a Host name (R) $g Uniform Resource name (R) $s File size (R) $u Uniform Resource Locator (NR) $z Public note (R) $2 Access method (NR) $3 Materials specified (NR) $6 Linkage (NR) Marc format for authority records The field labels (tags) largely parallel those of the document format, particularly 000 - 099. 0xx Call numbers, control numbers Includes, for example, class number(s) corresponding to a subject heading 1xx Established headings 260 Complex see reference (subject) 360 Complex see also reference (subject) 4xx See from reference [really type of relationship] 5xx See also from reference 6xx Series treatment information, notes 1xx, 4xx, and 5xx all use the following subdivision by type of entry, parallel to the MARC Format for Bibliographic Records x00 Personal name x10 Corporate name x11 Meeting name x30 Uniform title x50 Topical term x51 Geographic name Fields 4xx and 5xx have a subfield ≠w that encodes the type of relationship, for example ≠w a Earlier heading, ≠wb heading, ≠w g Broader Term, ≠w h Narrower term.