> For the complete documentation index, see [llms.txt](https://docs.decisionrules.io/doc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.decisionrules.io/doc/~/changes/VuchuDyabVa3NSXAKjpZ/decision-tables/input-and-output/json-editor.md).

# JSON Editor

## Working with the JSON Editor

<figure><img src="/files/gNAsLqoUZ94z67CjjuzN" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
All the changes are made to the current table version.
{% endhint %}

{% hint style="info" %}
There are no limitations in creating Input/Output model. A model can have unlimited root objects and unlimited children.&#x20;
{% endhint %}

{% hint style="warning" %}
Make sure you're saving your changes by pressing the ![](/files/hlaAHFJ4IAatsgNpnTXF) button in the bottom right corner.
{% endhint %}

### Creating a Model

The Model has the same structure as a tree and should be written in JSON format. There are root objects that contain children, but only leaf objects (objects without children) can be selected as variables.

#### There is only one option on how to create a leaf object:

* Object with empty **{}**: `"object": {}`

{% hint style="warning" %}
Arrays and values are not allowed.
{% endhint %}

#### Example of a simple model with leaves only:

```javascript
{
    "distance": {},
    "tariff": {},
    "weight": {},
    "longestSide": {}
}
```

#### Example of a complex model:

```javascript
{
  "delivery": {
    "distance": {
      "car": {},
      "ship": {},
      "plane": {}
    },
    "tariff": {}
  },
  "package": {
    "weight": {},
    "longestSide": {}
  }
}
```

### Beautify Code

The button ![](/files/-MQWB2YKw7NfX_blrF6M) will change your written code to a better readable format.

{% hint style="info" %}
This functionality is especially useful when **copying and pasting** JSON from another source or window on your device.
{% endhint %}


---

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