> For the complete documentation index, see [llms.txt](https://doc.wearepatchworks.com/product-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.wearepatchworks.com/product-documentation/patchworks-services/working-with-services/the-anatomy-of-a-service/service-mapping.md).

# Service mapping

## Introduction

Field mappings are key to Patchworks services. By creating mappings between source and destination data fields, the Patchworks engine knows how to transform incoming data as needed to update the destination system

The **mapping** tab displays existing mappings for the service, organised in logical categories - for example:

<figure><img src="/files/04tXsKILjbaBautOz57I" alt=""><figcaption></figcaption></figure>

## Working with mappings

For detailed information about working with field mappings, please see the [Field mappings & transformations](/product-documentation/patchworks-services/working-with-services/field-mappings-and-transformations-services.md) section of this documentation.  &#x20;