purl

{
  "$schema": "https://packageurl.org/schemas/purl-type-definition.schema-1.0.json",
  "$id": "https://packageurl.org/types/pub-definition.json",
  "type": "pub",
  "type_name": "Pub",
  "description": "Dart and Flutter pub packages",
  "repository": {
    "use_repository": true,
    "default_repository_url": "https://pub.dartlang.org"
  },
  "namespace_definition": {
    "requirement": "prohibited",
    "note": "there is no namespace"
  },
  "name_definition": {
    "requirement": "required",
    "native_name": "name",
    "case_sensitive": false,
    "permitted_characters": "^[a-z0-9_]",
    "normalization_rules": [
      "Replace non-[a-z] letters, non-[0-9] digits with underscore _"
    ],
    "note": "Pub normalizes all package names to be lowercase and using underscores. The only allowed characters are [a-z0-9_]. More information on pub naming and versioning is available in the pubspec documentation https://dart.dev/tools/pub/pubspec"
  },
  "version_definition": {
    "requirement": "optional",
    "native_name": "version"
  },
  "examples": [
    "pkg:pub/characters@1.2.0",
    "pkg:pub/flutter@0.0.0"
  ]
}