> For the complete documentation index, see [llms.txt](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.b2ihealthcare.com/snow-owl-authoring-platform/local-code-systems/authoring/adding-local-codes.md).
# Adding Local Codes
To add a code to your Local Code System, right-click on the desired Local Code System's name to reveal the **Context Menu**, and select **`New child code...`** action.
Creating new Local Code System Code
Enter the code ID and the code term.
{% hint style="info" %}
The code ID is optional, the system will generate a quasi-sequential integer ID if the ID field is omitted.
{% endhint %}
{% hint style="success" %}
After finishing the wizard the new code is displayed in the **Local Code System View** and its editor opens automatically.
{% endhint %}
If you want to specify other terms, click on the **`Add new description`**  button and enter the information.
{% hint style="info" %}
If the entry field is not visible, click on the triangle next to Descriptions to expand the section for descriptions.
{% endhint %}
To delete an alternative term or if you unintentionally added an entry field click on the  button next to the entry field.
The user-defined additional properties are listed under the *Additional Properties* section. Mandatory properties are added by default, optional properties can be added by pressing the **`+`** button on the header. The **`+`** button reveals a **Context Menu** with all the properties defined for the Local Code System with the applicable properties enabled. Properties can be removed by pressing the  button next to the property. Property values are validated against the validation expression configured for the corresponding definition set on the Local Code System.
Mandatory properties validation
{% hint style="info" %}
To add a code of the same hierarchy level as your new code, right-click the root. To add a code of a lower hierarchy level, right-click on the parent and select the **`New child code...`** action from the **Context Menu***.*
{% endhint %}
Double-click the code in the **Local Code System View** to open its editor. Modify the information by overwriting the text fields, or adding or deleting additional terms, properties.
---
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