// Adapted from https://docs.google.com/spreadsheets/d/1QbIxsJGosgzKYBXhDhJJlTZtvCRjz75TRecn1cbDhm8/edit
// Retrieved 2021-01-15

// TODO: check Google Sheets automatically for updates

852 - LOCATION (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $c - Location/Archive/Repository

901 - IDENTIFIERS [INTERNAL] (NR) [REQUIRED WHEN APPLICABLE]
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Ark identifier for METS file [REQUIRED WHEN APPLICABLE]
      $f - Ark identifier for finding aid
      $g - PJID:DBID from GenDB [REQUIRED WHEN APPLICABLE]
      $m - Millennium record number
      $o - OCLC Number

902 - RECORD CREATION DETAILS [INTERNAL] (NR) [REQUIRED]
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $d - Date of batch file creation [REQUIRED]
      $f - METS filename or other file used as source of data [REQUIRED WHEN APPLICABLE]
      $n - Batch uploader's initials [REQUIRED]
      $p - Description of the process and programs used

903 - BIBLIOGRAPHIC CODES FROM MARC RECORD (NR)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $b - Bibliographic codes

950 - Local/Administrative Notes (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Notes
      $3 - Note type

982 - COLLECTION / PROJECT NAME (R) [REQUIRED]
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Short collection name (displays in facet) [REQUIRED]
      $b - Long collection name (displays in record) [REQUIRED]
      $p - Project Name

991 - RESTRICTION STATUS (NR)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Restricted collection identifier

998 - AV TRACK INFO (R)
   Indicators
      First - Undefined
         # - Undefined
      Second - Undefined
         # - Undefined
   Subfield Codes
      $a - Duration (hh:mm:ss)
      $t - Title
      $g - Relative path [REQUIRED]

// Note: 856 is not documented in the spreadsheet, but inferred from use

856 - ELECTRONIC LOCATION AND ACCESS (R)
   Indicators
      First - Access method
         4 - HTTP
      Second - Relationship
         # - Content file
         1 - Library catalog record
         2 - Related resource
   Subfield Codes
      $s - File size (NR)
      $u - Uniform Resource Identifier (NR) [REQUIRED]
      $y - Link text (NR)
      $z - Comment (NR)
      $9 - Checksum (NR)