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    <srw:version>1.1</srw:version>
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            <zr:explain zr:authoritative="true" xmlns:zr="http://explain.z3950.org/dtd/2.0/">
                <zr:serverInfo zr:protocol="srw/u">
                    <zr:host>www.nature.com</zr:host>
                    <zr:port>80</zr:port>
                    <zr:database>opensearch/request</zr:database>
                </zr:serverInfo>
                <zr:databaseInfo>
                    <zr:title>nature.com OpenSearch</zr:title>
                    <zr:description>OpenSearch interface to nature.com using the SRU protocol</zr:description>
                    <zr:author>nature.com</zr:author>
                    <zr:contact>interfaces@nature.com</zr:contact>
                    <zr:implementation version="1.1" indentifier="http://www.oclc.org/research/software/srw">
                        <zr:title>OCLC Research SRW Server version 1.1</zr:title>
                    </zr:implementation>
                    <zr:links>
                        <zr:link zr:type="www">http://www.nature.com/</zr:link>
                        <zr:link zr:type="oai">http://www.nature.com/oai</zr:link>
                        <zr:link zr:type="rss">http://www.nature.com/rss</zr:link>
                        <zr:link zr:type="srw">http://www.nature.com/opensearch/request</zr:link>
                        <zr:link zr:type="sru">http://www.nature.com/opensearch/request</zr:link>
                        <zr:link zr:type="icon">http://www.nature.com/opensearch/common/imgs/npg_icon.jpg</zr:link>
                    </zr:links>
                </zr:databaseInfo>
                <zr:metaInfo>
                </zr:metaInfo>
                <zr:indexInfo>
                    <zr:set zr:identifier="info:srw/cql-context-set/1/prism-v2.0" zr:name="prism"/>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>prism.volume</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">volume</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>prism.issn</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">issn</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>prism.publicationName</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">publicationName</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
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                    </zr:index>
                    <zr:set zr:identifier="info:srw/cql-context-set/1/dc-v1.1" zr:name="dc"/>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>dc.identifier</zr:title>
                        <zr:map>
                            <zr:name zr:set="dc">identifier</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>dc.publisher</zr:title>
                        <zr:map>
                            <zr:name zr:set="dc">publisher</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                            <zr:supports zr:type="relation">adj</zr:supports>
                            <zr:supports zr:type="relation">all</zr:supports>
                            <zr:supports zr:type="relation">any</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>prism.number</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">number</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:set zr:identifier="info:srw/cql-context-set/1/cql-v1.1" zr:name="cql"/>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>cql.keywords</zr:title>
                        <zr:map>
                            <zr:name zr:set="cql">keywords</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                            <zr:supports zr:type="relation">adj</zr:supports>
                            <zr:supports zr:type="relation">all</zr:supports>
                            <zr:supports zr:type="relation">any</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>prism.eIssn</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">eIssn</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="true" zr:search="true" zr:sort="true">
                        <zr:title>prism.alternateTitle</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">alternateTitle</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                            <zr:supports zr:type="relation">adj</zr:supports>
                            <zr:supports zr:type="relation">all</zr:supports>
                            <zr:supports zr:type="relation">any</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>prism.publicationDate</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">publicationDate</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                            <zr:supports zr:type="relation">&lt;</zr:supports>
                            <zr:supports zr:type="relation">&gt;</zr:supports>
                            <zr:supports zr:type="relation">&lt;=</zr:supports>
                            <zr:supports zr:type="relation">&gt;=</zr:supports>
                            <zr:supports zr:type="relation">within</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>prism.copyright</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">copyright</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                            <zr:supports zr:type="relation">adj</zr:supports>
                            <zr:supports zr:type="relation">all</zr:supports>
                            <zr:supports zr:type="relation">any</zr:supports>
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                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>dc.title</zr:title>
                        <zr:map>
                            <zr:name zr:set="dc">title</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                            <zr:supports zr:type="relation">adj</zr:supports>
                            <zr:supports zr:type="relation">all</zr:supports>
                            <zr:supports zr:type="relation">any</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>cql.resultSetId</zr:title>
                        <zr:map>
                            <zr:name zr:set="cql">resultSetId</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>prism.url</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">url</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>prism.doi</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">doi</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>prism.startingPage</zr:title>
                        <zr:map>
                            <zr:name zr:set="prism">startingPage</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                    <zr:index zr:scan="false" zr:search="true" zr:sort="true">
                        <zr:title>dc.creator</zr:title>
                        <zr:map>
                            <zr:name zr:set="dc">creator</zr:name>
                        </zr:map>
                        <zr:configInfo>
                            <zr:supports zr:type="relation">=</zr:supports>
                            <zr:supports zr:type="relation">==</zr:supports>
                            <zr:supports zr:type="relation">&lt;&gt;</zr:supports>
                            <zr:supports zr:type="relation">adj</zr:supports>
                            <zr:supports zr:type="relation">all</zr:supports>
                            <zr:supports zr:type="relation">any</zr:supports>
                        </zr:configInfo>
                    </zr:index>
                </zr:indexInfo>
                <zr:schemaInfo>
                    <zr:schema zr:sort="false" zr:retrieve="true" zr:name="pam"
              zr:identifier="info:srw/schema/11/pam-v2.1"
              zr:location="http://www.prismstandard.org/schemas/pam/2.1/pam.xsd">
                        <zr:title>PAM</zr:title>
                    </zr:schema>
                </zr:schemaInfo>
                <zr:configInfo>
                    <zr:default zr:type="maximumRecords">100</zr:default>
                    <zr:default zr:type="numberOfRecords">25</zr:default>
                    <zr:default zr:type="retrieveSchema">info:srw/schema/11/pam-v2.1</zr:default>
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</srw:explainResponse>
