# Helpers

{% content-ref url="helpers/usdextname" %}
[usdextname](https://docs.documint.me/templates/working-with-dynamic-data/functions-and-operators/helpers/usdextname)
{% endcontent-ref %}

Returns the extension name of a filename.

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{% content-ref url="helpers/usdinspect" %}
[usdinspect](https://docs.documint.me/templates/working-with-dynamic-data/functions-and-operators/helpers/usdinspect)
{% endcontent-ref %}

Displays the raw merge data used to create the document. Useful for debugging your template when merging documents.

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