# `Unicode.Transform.Rule.Definition`
[🔗](https://github.com/elixir-unicode/unicode_transform/blob/v1.1.0/lib/unicode/transform/rule.ex#L86)

A variable definition rule.

### Syntax

```
$variableName = contents ;
```

Variables are substituted within other variable definitions and conversion rules.

See [Variable Definition Rules](https://unicode.org/reports/tr35/tr35-general.html#Variable_Definition_Rules).

# `t`

```elixir
@type t() :: %Unicode.Transform.Rule.Definition{
  value: String.t(),
  variable: String.t()
}
```

---

*Consult [api-reference.md](api-reference.md) for complete listing*