newsupernova/vendor/magento/framework/View/Layout/etc/page_configuration.xsd

<?xml version="1.0" encoding="UTF-8"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:include schemaLocation="urn:magento:framework:View/Layout/etc/head.xsd"/>
    <xs:include schemaLocation="urn:magento:framework:View/Layout/etc/body.xsd"/>
    <xs:include schemaLocation="urn:magento:framework:View/Layout/etc/html.xsd"/>

    <xs:complexType name="pageType">
        <xs:sequence minOccurs="0" maxOccurs="unbounded">
            <xs:element name="html" type="htmlType" minOccurs="0" maxOccurs="unbounded"/>
            <xs:element name="body" type="bodyType" minOccurs="0" maxOccurs="unbounded"/>
            <xs:element name="head" type="headType" minOccurs="0" maxOccurs="unbounded"/>
            <xs:element ref="update" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
        <xs:attribute  type="xs:string" name="layout" />
        <xs:attribute  type="xs:string" name="label" />
        <xs:attribute  type="xs:string" name="design_abstraction" />
    </xs:complexType>

    <xs:element name="page" type="pageType">
        <xs:unique name="blockKey">
            <xs:selector xpath=".//block"/>
            <xs:field xpath="@name"/>
        </xs:unique>
        <xs:unique name="containerKey">
            <xs:selector xpath=".//container"/>
            <xs:field xpath="@name"/>
        </xs:unique>
    </xs:element>

    <xs:complexType name="const">
        <xs:complexContent>
            <xs:extension base="argumentType" />
        </xs:complexContent>
    </xs:complexType>
</xs:schema>