It's a slighty modified semantic versioning specification, which can be matched using this regular expression pattern ^(0|[1-9]\d*).(0|[1-9]\d*)(?😦(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-])(?:.(?:0|[1-9]\d|\d*[a-zA-Z-][0-9a-zA-Z-]))))$.