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sampStat, collSrc and storage filters have entries that are actually categories with sub-categories:

Example for "TYPE OF GERMPLASM STORAGE": "Long term seed collection" is a subcategory of "Seed collection":

"10": "Seed collection",
      "11": "Short term seed collection",
      "12": "Medium term seed collection",
      "13": "Long term seed collection",
"20": "Field collection",

By checking the "super" category, all sub-categories should be automatically ticked. On un-ticking, no changes are needed.

Example for "SAMPSTAT":

"100": "Wild",
  "110": "Natural",
  "120": "Semi-natural/wild",
  "130": "Semi-natural/sown",
"200": "Weedy",
"300": "Traditional cultivar/Landrace",
"400": "Breeding/Research Material",
  "410": "Breeders Line",
    "411": "Synthetic population",
    "412": "Hybrid",
    "413": "Founder stock/base population",
    "414": "Inbred line",
    "415": "Segregating population",
    "416": "Clonal selection",
  "420": "Genetic stock",
    "421": "Mutant",
    "422": "Cytogenetic stocks",
    "423": "Other genetic stocks",
"500": "Advanced/improved cultivar",
"600": "GMO",
"999": "Other"

Identifying categories and their sub-categories

Regexp ^(\d+)(0+)$ should identify potential "parents". Child records are those that start with regexp match group $1.

For "100": "Wild", ^(\d+)(0+)$ on "100" matches and gives two groups: "1" and "00". Children are those that start with "1".

For "410": "Breeders Line", ^(\d+)(0+)$ on "410" matches and gives two groups: "41" and "0". Children are those categories that start with "41".

If supplying <StringArrFilter indented flag, the component should operate in "indented mode" as described here.