<?xml version="1.0" encoding="UTF-8"?><xs:schema xmlns="http://archive.org/arc/1.0/"    targetNamespace="http://archive.org/arc/1.0/"    xmlns:arc="http://archive.org/arc/1.0/"    xmlns:xs="http://www.w3.org/2001/XMLSchema"    xmlns:dc="http://purl.org/dc/elements/1.1/"    xmlns:dcterms="http://purl.org/dc/terms/" elementFormDefault="qualified" attributeFormDefault="unqualified">    <xs:annotation>        <xs:documentation xml:lang="en">            Internet Archive ARC file Dublin Core element refinements.                         XML Schema for http://archive.org/arc/1.0/ namespace.                        This schema adds Dublin Core element refinements for Internet            Achive ARC file metadata. It also adds new elements            that subclass the 'dc:any' type and the 'dc:metadata'            element container.                         $Id: arc.xsd 2094 2004-05-21 02:08:50Z stack-sf $                </xs:documentation>    </xs:annotation>    <xs:import namespace="http://www.w3.org/XML/1998/namespace"        schemaLocation="http://www.w3.org/2001/03/xml.xsd"/>    <xs:import namespace="http://purl.org/dc/elements/1.1/"        schemaLocation="http://dublincore.org/schemas/xmls/qdc/2003/04/02/dc.xsd"/>    <xs:import namespace="http://purl.org/dc/terms/"        schemaLocation="http://dublincore.org/schemas/xmls/qdc/2003/04/02/dcterms.xsd"/>    <xs:element name="robots" substitutionGroup="dc:coverage">        <xs:annotation>            <xs:documentation xml:lang="en">                Element-refinement for 'dc:coverage'.                The robots policy followed by the                crawler harvesting this resource.  Example: 'classic'.            </xs:documentation>        </xs:annotation>    </xs:element>    <xs:element name="http-header-from" substitutionGroup="dc:any">        <xs:annotation>            <xs:documentation xml:lang="en">The HTTP 'From' header sent by the                crawler along with each request. Example:                'webmaster@localhost.localdomain'. Note that this value will be                removed from metadata when ARC files record the request sent                (Currently the response only is recorded in ARCs). </xs:documentation>        </xs:annotation>    </xs:element>    <xs:element name="http-header-user-agent" substitutionGroup="dc:any">        <xs:annotation>            <xs:documentation xml:lang="en"> The HTTP 'user-agent' header sent                by the crawler along with each request. Example:                'os-heritrix/0.7.0 (+http://crawler.archive.org)'. Note that                this value will be removed from metadata when ARC files record                the request sent (Currently the response only is recorded in                ARCs). </xs:documentation>        </xs:annotation>    </xs:element>    <xs:element name="software" substitutionGroup="dc:creator">        <xs:annotation>            <xs:documentation xml:lang="en"> Element-refinement for 'dc:creator'.                The software and software version used creating this resource.                Example: 'heritrix 0.7.1 http://crawler.archive.org'. </xs:documentation>        </xs:annotation>    </xs:element>    <xs:element name="hostname" substitutionGroup="dc:creator">        <xs:annotation>            <xs:documentation xml:lang="en"> Element-refinement for 'dc:creator'.                The hostname of the machine that created this resource. Example                'debord.archive.org'. </xs:documentation>        </xs:annotation>    </xs:element>    <xs:element name="ip" substitutionGroup="dc:creator">        <xs:annotation>            <xs:documentation xml:lang="en"> Element-refinement for 'dc:creator'.                The IP address of the machine that created this resource.                Example '123.1.2.3'. </xs:documentation>        </xs:annotation>    </xs:element>    <xs:element name="operator" substitutionGroup="dc:creator">        <xs:annotation>            <xs:documentation xml:lang="en"> Element-refinement for 'dc:creator'.                Contact name and information for the operator who created this resource.                Example: 'stack at archive dot org'. </xs:documentation>        </xs:annotation>    </xs:element>    <xs:element name="arcmetadata" type="dcterms:elementOrRefinementContainer">        <xs:annotation>            <xs:documentation xml:lang="en"> Root container for ARC metadata.                Can hold any 'dc:any' element. (All ARC elements are subclasses of                the 'dc:any' type). </xs:documentation>        </xs:annotation>    </xs:element></xs:schema>