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url: /statelake/tag-reference/data-tags.md
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# Data Tags

**Data Tags** are references through to datasets and fields within your **DB Definitions**.

Therefore you can use **Data Tags** wherever a component is connected to a DB Definition - you can reference any of the datasets of fields from the **DB Definition**.

To determine whether tags can be used, please refer to the component you are configuring.

**Data Tags** use the special opening tag <% and closing tag %> with percent signs (%) at the beginning and end of the tag. Between the tags you need to provide the dataset name and field name separated with a full stop, using the format <%datasetname.fieldname%>.

The tag will be translated into a string value based on the **Display Format** specified for the field.

As an example, using a dataset with a **File Definition** containing a table called **INVOICELINE** with several fields including **InvoiceLine_ItemCode**, and **InvoiceLine_SubTotal**.

* To reference the **InvoiceLine_ItemCode** field you would use the tag <%INVOICELINE.InvoiceLine_ItemCode%>.
* To reference the **InvoiceLine_SubTotal** field you would use the tag <%INVOICELINE.InvoiceLine_SubTotal%>.