feat: *_classification files gain column indicating the version or revision of the bridge, if relevant

[jdhoffa]

Some classification systems (e.g. ISIC) have numerous different versions of the classification system.
It would be good to track this in a user-facing in, for example, the individual *_classification datasets, while recognizing that that column would never actually be used in the code.

My proposal would be that:

• the *_classification datasets gain a column indicating this information if necessary
• the sector_classifications dataset keeps only the crucial columns used by the code (e.g. sector, borderline, code, code_system)

cc @jacobvjk

AB#10174

[jdhoffa]

Update:

• nace_classification
• naics_classification
• sic_classification
• gics_classification
• psic_classification
• isic_classification

library(r2dii.data)

classifications <- list(
  nace_classification = nace_classification,
  naics_classification = naics_classification,
  sic_classification = sic_classification,
  gics_classification = gics_classification,
  psic_classification = psic_classification,
  isic_classification = isic_classification
)

lapply(classifications,names)
#> $nace_classification
#> [1] "original_code" "description"   "code"          "sector"       
#> [5] "borderline"    "version"      
#> 
#> $naics_classification
#> [1] "description" "code"        "sector"      "borderline" 
#> 
#> $sic_classification
#> [1] "description" "code"        "sector"      "borderline" 
#> 
#> $gics_classification
#> [1] "description" "code"        "sector"      "borderline" 
#> 
#> $psic_classification
#> [1] "description" "code"        "sector"      "borderline" 
#> 
#> $isic_classification
#> [1] "description" "code"        "sector"      "borderline"  "revision"

^{Created on 2024-03-12 with reprex v2.1.0}

[jdhoffa]

Closed by #357