[android-components](../../index.md) / [mozilla.components.concept.engine.utils](../index.md) / [EngineVersion](index.md) / [metadata](./metadata.md)

# metadata

`val metadata: `[`String`](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-string/index.html)`?` [(source)](https://github.com/mozilla-mobile/android-components/blob/master/components/concept/engine/src/main/java/mozilla/components/concept/engine/utils/EngineVersion.kt#L20)

Additional and optional metadata appended to the version number, e.g. for a version number of
"68.0a1" [metadata](./metadata.md) will contain "a1".

