..generic:
  git2rdata: 0.4.0
  optimize: no
  NA string: NA
  sorting:
  - group0
  - sumsource
  - sumtarget
  hash: 6b06a3c80a0ba7a9e804b1288c8fa5ea254caf63
  data_hash: 5be0e44b7e910941e8988a17c048cd78acb9b27b
source:
  class: character
target:
  class: character
value:
  class: numeric
group0:
  class: character
group:
  class: character
sumsource:
  class: numeric
sumtarget:
  class: numeric
IDsource:
  class: integer
IDtarget:
  class: integer
col:
  class: character
letter:
  class: character