> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Classification Skills

> Classification skills in ABBYY Vantage assign input documents to types — used for document sorting, document set integrity checks, and page-level assembly.

In addition to **Document skills**, ABBYY Vantage includes **Classification skills** that classify input documents into types. Use them to sort documents, verify the integrity of a document set, or classify pages for downstream document assembly.

These skills can be used in the following cases:

* To classify documents without further data extraction. For example, identifying types of letters to send them to the right department.
* To check the integrity of a document set. For example, when opening an account, applying for a loan, or purchasing an insurance policy.
* To classify pages for document assembly. For example, when processing a loan application containing several types of documents.

## Available Classification Skills

ABBYY Vantage has the following Classification skills:

* [Expense Management Classifier skill](/vantage/documentation/skill-catalog/built-in-skills/expense-management-classifier)
* [Invoice Classifier skill](/vantage/documentation/skill-catalog/built-in-skills/invoice-skills/invoice-classifier)
* [Purchase Order Classifier skill](/vantage/documentation/skill-catalog/built-in-skills/po-skills/purchase-order-classifier)
* [Vantage Classifier skill](/vantage/documentation/skill-catalog/built-in-skills/vantage-classifier)