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Types of MARC fields rules

• System-level: Tenant cannot change validation rules for the following fields

  • MARC BIB : LDR, 001, 005, 245, 999 ff, and control fields 006/007/008. 

  • MARC AUTHORITY:  LDR, 001, 005, 1XX, 999 ff, and control field 008.

• Non-localStandard:  Some validation rules can be configured at the tenant level. Non-local Standard fields are documented by LOC as not local. (ex. 130) 

• Local: all validation rules can be configured by the tenant. Local fields are: 

  • Not documented by LOC as a valid tag (ex. 192) 

  • Documented as a MARC local tag by LOC > 9xx, x9x, or xx9 (except 999 and 490)

System field rules

• Status
  colour Green title yes

  - can be changed

• Status
  colour Red title no

  - cannot be changed

• Status
  colour Blue title Append

  -cannot change MARC specified values. Can add more codes with names. 

Tenant configuration

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Standard field: Tenant level configuration options

• Status
  colour Green title yes

  - can be changed

• Status
  colour Red title no

  - cannot be changed

• Status
  colour Blue title Append

  -cannot change MARC specified values. Can add more codes with names. 

Standard (fna Non-local) fields > Tenant can modify

• Tag
  • Required/Optional
  • MARC Tag field name (Tenant cannot override) 
  • MARC Tag - help URL (Tenant can override) 
• Indicator 
  • Indicator 1 and Indicator 2
    • Tenant cannot change Indicator name specified by MARC 
    • Tenant cannot change Indicator codes and Indicator code names specified by MARC 
    • BUT Tenant can add/append more valid Indicator codes and Indicator code names NOT specified by MARC (IOW can define local indicator codes and indicator code names) 
• Subfield  
  • Tenant cannot change subfield name specified by MARC 
  • Tenant cannot change subfield code and subfield code names specified by MARC 
  • But Tenant can add/append more valid subfield codes and subfield code names NOT specified by MARC (if invalid value) (IOW tenant can define local subfield codes and subfield code names) 
  • Non-repeatable (NR) / Repeatable (R) - (Tenant can set/modify for local subfield codes but not MARC specified exceptions $9 and possibly $0)  
  • Subfield is required/optional (Tenant can set required/optional for any subfield code exceptions $9 and possibly $0) 
  • Exceptions might be $9 and $0 for a field that can be controlled by an authority heading 
• See more details MARC Validation Rules - Definition and Acceptable values

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