# Meta Data

Meta Data is additional data or information associated with a Tag Code. 

This might be directly associated with a specific Tag Code, or it might be inherited data from the Batch, Tag Group or Folder the Tag Code is in. 

There are four types of Meta Data: Core, Extended, System and Action. 

### Core Data

Core Data fields are created with every Tag Code. By default, they are empty fields. Any data you add will be associated only with that Tag Code. The Core Data fields are : 

* Tag Name
* UID 
* Custom UID (CUID)

{% content-ref url="/pages/7xjLsWhVtyc4EnDRuiuk" %}
[Core Data](/features/meta-data/core-data.md)
{% endcontent-ref %}

### Extended Data

Extended Data fields are optional. They are either text or dates that can be associated with a Tag Code. 

Extended Data fields can be given data at the Tag Group level to be inherited by all Tag Codes within that Tag Group. Additionally, Extended Data fields can also be given data at the Tag Code level either instead of the Tag Group data or to overrule the Tag Group data. 

For customers used to using Rules, the Tag Group / Tag Data inheritance works in the same way. 

Up to 2 Extended Data fields can be created with Flex plans, but more can be added using the Extended Data Module. 

{% content-ref url="/pages/wOoUILQ06MUdXdFVyZwB" %}
[Extended Data](/features/meta-data/extended-data.md)
{% endcontent-ref %}

### System Data

System Data is data that is automatically associated with Tag Codes. This is either in relation to their location within the system, such as the Batch Name where the Tag Code is located, or data associated with changes to the Tag Code such as Scan Count or Created Date. 

For example : 

* Batch Name
* Batch Code
* Tag Group Name
* Chip Count (if enabled)
* Scan Count
* Date Created

{% content-ref url="/pages/NgGHnsYA1qEpcUbv2AaV" %}
[System Data](/features/meta-data/system-data.md)
{% endcontent-ref %}

### Action Data

Action Data is typically transient data associated with a Tag Code at the point of scan. This data is available to be included using [Subtags](/features/subtags.md). This data is also typically stored with Scan data and is available in stats. 

* OS - android/iOS
* Browser
* Country
* Time Zone

{% content-ref url="/pages/16hRRpfCbqSGKObr2fN2" %}
[Action Data](/features/meta-data/action-data.md)
{% endcontent-ref %}


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