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sourceDocument: Xanadu Sales Customer Relationship Management
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/xanadu/order-management

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ft:locale :

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ft:publication_title :

    - Xanadu Sales Customer Relationship Management

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# Defining a horizontal relationship

# Defining a horizontal relationship {#ariaid-title1}

* Release version: Xanadu
* 
* Updated August 1, 2024
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

By using a compatibility rule, you can define the horizontal relationships between your
product, service, and resource specifications.

## Overview of horizontal relationships {#horizontal-relationships__section_zhb_2h1_stb}

When you create a product catalog, you can create a vertical relationship, which is the relationship between your parent and child entities. Your product catalog manager can also enable a horizontal relationship,which is a
relationship between product to product, product to service, or product to resource, by defining compatibility rules in the product catalog.

## Using a horizontal relationship {#horizontal-relationships__section_oz2_cvs_25b}

The compatibility rules include the horizontal relationships between your product, service,
and resource specifications. Your customers can now place orders for enterprise products where a
product can depend on another product in the same or different product offering, like a sibling
or a peer.

Let's look at an example of a horizontal relationship. The relationship between the Voice over
Internet Protocol (VoIP) and an internet service is a good example. VoIP requires an active
internet connection but VoIP and an internet service are defined in a different product
hierarchy. With a horizontal relationship, you can define a relationship between VoIP and an
internet service in the product catalog to support the order creation process for VoIP and to
fulfill the order.