# Data Format

> Format AML dimensions and measures for cleaner reports by adding a format property with a date or number pattern directly in your model definition file.

You can format AML fields to **improve readability** for your reports. This section will help you define a **Data-Format-As-Code** using AML. 

Available formats include:
- [Date Format](date-format)
- [Number Format](number-format)

## High-level concept

To format an AML dimension/measure,  you will need to add a `format` property to the dimension/measure definition that contains a **format pattern** to this dimension/measure. 

If your pattern is invalid, Holistics will **fall back to the default format** to render your data. 

```aml
Model public_accounts {
    type: 'table'
    label: 'Accounts'
    table_name: '\"public\".\"Accounts\"'
    data_source_name: "piggy_bank"

    dimension balance {
        label: "Balance"
        type: "number"
        definition: @sql {{ #SOURCE.balance }};;
        hidden: false
        format: "#,###0.00,,\"M\""
    }
}
```