> ## 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.

# Document Comparison Objects

> Document Comparison Objects in the ABBYY FineReader Engine API — ABBYY FineReader Engine provides the Comparator object to compare the original document or the page with their copies and find the differences; you may...

ABBYY FineReader Engine provides the [Comparator](/fine-reader/engine/api-reference/document-comparison-objects/comparator) object to compare the original document or the page with their copies and find the differences; you may highlight them for the operator performing manual verification or save the comparison results for the long-term storage or demonstration when discussing alterations.

Other objects in this section contain the methods to get these changes and export the comparison results to a file of the specified format.<br />This section contains descriptions of the following objects:

* [Comparator](/fine-reader/engine/api-reference/document-comparison-objects/comparator)
* [ComparisonParams](/fine-reader/engine/api-reference/document-comparison-objects/comparisonparams)
* [ComparisonResult](/fine-reader/engine/api-reference/document-comparison-objects/comparisonresult)
* [Change](/fine-reader/engine/api-reference/document-comparison-objects/change)
* [Changes](/fine-reader/engine/api-reference/document-comparison-objects/changes)
* [ChangeLocation](/fine-reader/engine/api-reference/document-comparison-objects/changelocation)
* [ChangePosition](/fine-reader/engine/api-reference/document-comparison-objects/changeposition)
* [PictureChange](/fine-reader/engine/api-reference/document-comparison-objects/picturechange)
* [TextChange](/fine-reader/engine/api-reference/document-comparison-objects/textchange)

## The document comparison objects hierarchy

<img src="https://mintcdn.com/abbyy/6udH-pkk8zkVafYH/images/fine-reader/engine/documentcomparisonobjects.gif?s=d7956138371893496da93fed656c9b29" alt="DocumentComparisonObjects" width="344" height="147" data-path="images/fine-reader/engine/documentcomparisonobjects.gif" />[](/fine-reader/engine/api-reference/document-comparison-objects/comparisonparams)[](/fine-reader/engine/api-reference/document-comparison-objects/textchange)[](/fine-reader/engine/api-reference/document-comparison-objects/picturechange)[](/fine-reader/engine/api-reference/document-comparison-objects/changeposition)[](/fine-reader/engine/api-reference/document-comparison-objects/changelocation)[](/fine-reader/engine/api-reference/document-comparison-objects/change)[](/fine-reader/engine/api-reference/document-comparison-objects/changes)[](/fine-reader/engine/api-reference/document-comparison-objects/comparisonresult)[](/fine-reader/engine/api-reference/document-comparison-objects/comparator)

For more information about the hierarchy of the ABBYY FineReader Engine objects, please see the [Object Diagram](/fine-reader/engine/api-reference/object-diagram).