Application Resource Bundle (ARB) is a file format for managing localized text strings in applications, particularly in Flutter development. The format is JSON-based but differs in structure and additional information from Lingohub's standard JSON implementation since ARB files can include additional metadata for context, description, and other attributes.

Format

The file extension is .arb
A segment is defined as for JSON as a key-value pair
Additional attributes for a segment can be defined by an additional attribute
"@<key of corresponding segment>": {<holds object defining attributes like type, context, description, placeholder information >}
Such information will be stored at import to be exported again
Placeholder syntax is {<name>}
Plurals are supported by ICU placeholder syntax.
Attributes like @@last_modified& @@locale will be set at export
Global attributes starting with @@ and custom attributes starting with x- will be exported as imported

Examples

{
  "@@last_modified": "2021-02-15T09:58:36.312610",
  "@@locale": "en_US",
  "title_bar": "My Cool Home",
  "@title_bar": {
    "type": "text",
    "context": "HomePage",
    "description": "Page title."
  },
  "okMessage": "Everything works fine.",
  "pendingCosts": "Your pending cost is {COST}",
  "@pendingCosts": {
    "type": "currency",
    "context": "HomePage:MainPanel",
    "description": "balance statement.",
    "placeholders": {
      "COST": {
        "example": "$123.45",
        "description": "cost presented with currency symbol"
      }
    }
  },
  "pageHomeInboxCount": "{count, plural, one{You have 1 new message} other{You have {count} new messages}}",
  "@pageHomeInboxCount": {
    "context": "New messages count on the Home screen",
    "placeholders": {
      "count": {}
  }
}

Format

Examples

References