<type name="Magento\Ui\Config\Reader\DefinitionMap">
    <arguments>
        <argument name="fileName" xsi:type="string">
            etc/definition.map.xml
        </argument>
        <argument name="converter" xsi:type="object">
            Magento\Ui\Config\Reader\DefinitionMap\Converter
        </argument>
        <argument name="fileResolver" xsi:type="object">
            Magento\Ui\Config\Reader\FileResolver
        </argument>
        <argument name="schemaLocator" xsi:type="object">
            Magento\Ui\Config\Reader\DefinitionMap\SchemaLocator
        </argument>
        <argument name="idAttributes" xsi:type="array">
            <item name="/components/component" xsi:type="string">
                name
            </item>
        </argument>
    </arguments>
</type>

This is a type configuration.

This configuration is for the base area. Base area configurations will apply to all the sub-applications.

This configuration tells the Object Manager that when a user wants a Magento\Ui\Config\Reader\DefinitionMap object that the following arguments should be used in the foo object's constructor.

• $fileName = "etc/definition.map.xml";
• $converter = new Magento\Ui\Config\Reader\DefinitionMap\Converter (...)
• $fileResolver = new Magento\Ui\Config\Reader\FileResolver (...)
• $schemaLocator = new Magento\Ui\Config\Reader\DefinitionMap\SchemaLocator (...)
• $idAttributes = [...items...];

<type name="Magento\Ui\Config\Converter">
    <arguments>
        <argument name="reader" xsi:type="object">
            Magento\Ui\Config\Reader\DefinitionMap
        </argument>
        <argument name="parser" xsi:type="object">
            Magento\Ui\Config\Argument\Parser\Composite
        </argument>
    </arguments>
</type>

This is a type configuration.

This configuration is for the base area. Base area configurations will apply to all the sub-applications.

This configuration tells the Object Manager that when a user wants a Magento\Ui\Config\Converter object that the following arguments should be used in the foo object's constructor.

• $reader = new Magento\Ui\Config\Reader\DefinitionMap (...)
• $parser = new Magento\Ui\Config\Argument\Parser\Composite (...)

<virtualType name="Magento\Ui\Config\DefinitionMap\Data"
             type="Magento\Framework\Config\Data">
    <arguments>
        <argument name="reader" xsi:type="object">
            Magento\Ui\Config\Reader\DefinitionMap
        </argument>
        <argument name="cacheId" xsi:type="string">
            ui_component_definition_map_data
        </argument>
    </arguments>
</virtualType>

This is a virtual type configuration.

This configuration is for the base area. Base area configurations will apply to all the sub-applications.

This virtualType configuration tells the Object Manager when a user wants a virtual Magento\Ui\Config\DefinitionMap\Data object that it should return a Magento\Framework\Config\Data object.

This configuration tells the Object Manager that when a user wants a Magento\Ui\Config\DefinitionMap\Data object that the following arguments should be used in the foo object's constructor.

• $reader = new Magento\Ui\Config\Reader\DefinitionMap (...)
• $cacheId = "ui_component_definition_map_data";