CSVw - Data validation language

CSVw, aka CSV on the Web, is a data validation language created in 2014 by Ivan Herman.

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The CSV on the Web Working Group has developed standard ways to express useful metadata about CSV files and other kinds of tabular data.

CSVw is developed on GitHub and has 145 stars
CSVw first developed in CSV on the Web Working Group and CSV on the Web Community Group
Read more about CSVw on the web: 1.
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Example from the web:

{
  "@context": "http://www.w3.org/ns/csvw",
  "url": "countries.csv",
  "tableSchema": {
    "aboutUrl": "http://example.org/country/{code}",
    "columns": [{
      "titles": "country",
      "name": "code"
    },{
      "titles": "country group"
    },{
      "titles": "name (en)",
      "lang": "en"
    },{
      "titles": "name (fr)",
      "lang": "fr"
    },{
      "titles": "name (de)",
      "lang": "de"
    },{
      "titles": "latitude",
      "datatype": "number"
    },{
      "titles": "longitude",
      "datatype": "number"
    }]
  }
}