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title: Attribute Access Control
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---

# Attribute Access Control

The `access` attribute on the `aura:attribute` tag controls whether the attribute can be used outside of the attribute’s namespace.

Possible values are listed below.

|Access|Description|
|------|-----------|
|`private`|Available within the component, app, interface, or event, or method and can’t be referenced outside the resource. Accessing a private attribute returns `undefined` unless you reference it from the component in which it’s declared. You can’t access a private attribute from a sub-component that extends the component containing the private attribute.|
|`public`|Available within your org only. This is the default access value.|
|`global`|Available in all orgs.|