magento-test/app/code/Magento/Variable/Test/Mftf/Data/VariableData.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
 /**
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
-->

<entities xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:mftf:DataGenerator/etc/dataProfileSchema.xsd">
    <entity name="_defaultVariable" type="cms_page">
        <data key="city"> Austin </data>
    </entity>
    <entity name="customVariable" type="cms_page">
        <data key="code" unique="suffix">variable-code</data>
        <data key="name">Test Variable</data>
        <data key="html"> Sample Variable </data>
        <data key="plain">variable-plain-</data>
    </entity>
    <entity name="SampleVariable">
        <data key="code" unique="suffix">variable-code-</data>
        <data key="name">Test Sample Variable</data>
        <data key="html">Test Sample Variable HTML value</data>
        <data key="plain">Test Sample Variable PLAIN value</data>
    </entity>
</entities>