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Title:          Dead space estimates may not be independently associated with 28-day mortality in COVID-19 ARDS
Subject:        Critical Care, https://doi.org/10.1186/s13054-021-03570-0
Keywords:       Acute respiratory distress syndrome;ARDS;Respiratory dead space;Dead space;Ventilatory ratio;COVID-19;Mortality;Prognostication
Author:          Luis Morales-Quinteros
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      Title: Dead space estimates may not be independently associated with 28-day mortality in COVID-19 ARDS
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        Title: Abstract 
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          Title: Background: 
         Item: 
          Title: Methods: 
         Item: 
          Title: Results: 
         Item: 
          Title: Conclusions: 
       Item: 
        Title: Background
       Item: 
        Title: Methods
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          Title: Study design and oversight
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          Title: Patients
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          Title: Data collection
         Item: 
          Title: Data definition and exposure
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          Title: Outcomes
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        Title: Results
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          Title: Study population
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          Title: Markers of impaired ventilation
         Item: 
          Title: Predictive accuracy of markers of impaired ventilation
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          Title: Sensitivity analysis
         Item: 
          Title: Post-hoc analysis
       Item: 
        Title: Discussion
       Item: 
        Title: Conclusions
       Item: 
        Title: Acknowledgements
       Item: 
        Title: References
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    Title: Dead space estimates may not be independently associated with 28-day mortality in COVID-19 ARDS
    Author:  Luis Morales-Quinteros
    Subject: Critical Care, https://doi.org/10.1186/s13054-021-03570-0
    Keywords: Acute respiratory distress syndrome;ARDS;Respiratory dead space;Dead space;Ventilatory ratio;COVID-19;Mortality;Prognostication
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               <rdf:li> Luis Morales-Quinteros</rdf:li>
               <rdf:li> Ary Serpa Neto</rdf:li>
               <rdf:li> Antonio Artigas</rdf:li>
               <rdf:li> Lluis Blanch</rdf:li>
               <rdf:li> Michela Botta</rdf:li>
               <rdf:li> David A. Kaufman</rdf:li>
               <rdf:li> Marcus J. Schultz</rdf:li>
               <rdf:li> Anissa Tsonas</rdf:li>
               <rdf:li> Frederique Paulus</rdf:li>
               <rdf:li> Lieuwe D. Bos</rdf:li>
               <rdf:li> A. G. Algera</rdf:li>
               <rdf:li> L. S. Boers</rdf:li>
               <rdf:li> L. D. J. Bos</rdf:li>
               <rdf:li> M. Botta</rdf:li>
               <rdf:li> J. Pillay</rdf:li>
               <rdf:li> D. A. Dongelmans</rdf:li>
               <rdf:li> M. W. Hollmann</rdf:li>
               <rdf:li> J. Horn</rdf:li>
               <rdf:li> F. Paulus</rdf:li>
               <rdf:li> A. Serpa Neto</rdf:li>
               <rdf:li> M. J. Schultz</rdf:li>
               <rdf:li> A. M. Tsonas</rdf:li>
               <rdf:li> A. P. Vlaar</rdf:li>
               <rdf:li> M. Botta</rdf:li>
               <rdf:li> A. M. Tsonas</rdf:li>
               <rdf:li> J. P. van Akkeren</rdf:li>
               <rdf:li> A. G. Algera</rdf:li>
               <rdf:li> C. K. Algoe</rdf:li>
               <rdf:li> R. B. van Amstel</rdf:li>
               <rdf:li> Artigas A</rdf:li>
               <rdf:li> O. L. Baur</rdf:li>
               <rdf:li> P. van de Berg</rdf:li>
               <rdf:li> A. E. van den Berg</rdf:li>
               <rdf:li> D. C. J. J. Bergmans</rdf:li>
               <rdf:li> D. I. van den Bersselaar</rdf:li>
               <rdf:li> F. A. Bertens</rdf:li>
               <rdf:li> A. J. G. H. Bindels</rdf:li>
               <rdf:li> M. M. de Boer</rdf:li>
               <rdf:li> S.den Boer</rdf:li>
               <rdf:li> L. S. Boers</rdf:li>
               <rdf:li> M. Bogerd</rdf:li>
               <rdf:li> L. D. J. Bos</rdf:li>
               <rdf:li> M. Botta</rdf:li>
               <rdf:li> J. S. Breel</rdf:li>
               <rdf:li> H. de Bruin</rdf:li>
               <rdf:li> S. de Bruin</rdf:li>
               <rdf:li> C. L. Bruna</rdf:li>
               <rdf:li> L. A. Buiteman–Kruizinga</rdf:li>
               <rdf:li> O. Cremer</rdf:li>
               <rdf:li> R. M. Determann</rdf:li>
               <rdf:li> W. Dieperink</rdf:li>
               <rdf:li> D. A. Dongelmans</rdf:li>
               <rdf:li> H. S. Franke</rdf:li>
               <rdf:li> M. S. Galek–Aldridge</rdf:li>
               <rdf:li> M. J. de Graaff</rdf:li>
               <rdf:li> L. A. Hagens</rdf:li>
               <rdf:li> J. J. Haringman</rdf:li>
               <rdf:li> S. T. van der Heide</rdf:li>
               <rdf:li> P. L. J. van der Heiden</rdf:li>
               <rdf:li> N. F. L. Heijnen</rdf:li>
               <rdf:li> S. J. P. Hiel</rdf:li>
               <rdf:li> L. L. Hoeijmakers</rdf:li>
               <rdf:li> L. Hol</rdf:li>
               <rdf:li> M. W. Hollmann</rdf:li>
               <rdf:li> M. E. Hoogendoorn</rdf:li>
               <rdf:li> J. Horn</rdf:li>
               <rdf:li> R. van der Horst</rdf:li>
               <rdf:li> E. L. K. Ie</rdf:li>
               <rdf:li> D. Ivanov</rdf:li>
               <rdf:li> N. P. Juffermans</rdf:li>
               <rdf:li> E. Kho</rdf:li>
               <rdf:li> E. S. de Klerk</rdf:li>
               <rdf:li> A. W. M. M. Koopman-van Gemert</rdf:li>
               <rdf:li> M. Koopmans</rdf:li>
               <rdf:li> S. Kucukcelebi</rdf:li>
               <rdf:li> M. A. Kuiper</rdf:li>
               <rdf:li> D. W. de Lange</rdf:li>
               <rdf:li> N. van Mourik</rdf:li>
               <rdf:li> Morales-Quinteros L</rdf:li>
               <rdf:li> S. G. Nijbroek</rdf:li>
               <rdf:li> M. Onrust</rdf:li>
               <rdf:li> E. A. N. Oostdijk</rdf:li>
               <rdf:li> F. Paulus</rdf:li>
               <rdf:li> C. J. Pennartz</rdf:li>
               <rdf:li> J. Pillay</rdf:li>
               <rdf:li> L. Pisani</rdf:li>
               <rdf:li> I. M. Purmer</rdf:li>
               <rdf:li> T. C. D. Rettig</rdf:li>
               <rdf:li> J. P. Roozeman</rdf:li>
               <rdf:li> M. T. U. Schuijt</rdf:li>
               <rdf:li> M. J. Schultz</rdf:li>
               <rdf:li> A. Serpa Neto</rdf:li>
               <rdf:li> M. E. Sleeswijk</rdf:li>
               <rdf:li> M. R. Smit</rdf:li>
               <rdf:li> P. E. Spronk</rdf:li>
               <rdf:li> W. Stilma</rdf:li>
               <rdf:li> A. C. Strang</rdf:li>
               <rdf:li> A. M. Tsonas</rdf:li>
               <rdf:li> P. R. Tuinman</rdf:li>
               <rdf:li> C. M. A. Valk</rdf:li>
               <rdf:li> F. L. Veen-Schra</rdf:li>
               <rdf:li> L. I. Veldhuis</rdf:li>
               <rdf:li> P. van Velzen</rdf:li>
               <rdf:li> W. H. van der Ven</rdf:li>
               <rdf:li> A. P. J. Vlaar</rdf:li>
               <rdf:li> P. van Vliet</rdf:li>
               <rdf:li> P. H. J. van der Voort</rdf:li>
               <rdf:li> L. van Welie</rdf:li>
               <rdf:li> H. J. F. T. Wesselink</rdf:li>
               <rdf:li> H. H. van der Wier-Lubbers</rdf:li>
               <rdf:li> B. van Wijk</rdf:li>
               <rdf:li> T. Winters</rdf:li>
               <rdf:li> W. Y. Wong</rdf:li>
               <rdf:li> A. R. H. van Zanten</rdf:li>
            </rdf:Seq>
         </dc:creator>
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         <crossmark:MajorVersionDate>2010-04-23</crossmark:MajorVersionDate>
         <crossmark:CrossmarkDomainExclusive>true</crossmark:CrossmarkDomainExclusive>
         <crossmark:CrossMarkDomains>
            <rdf:Seq>
               <rdf:li>springer.com</rdf:li>
               <rdf:li>springerlink.com</rdf:li>
            </rdf:Seq>
         </crossmark:CrossMarkDomains>
         <prism:url>https://doi.org/10.1186/s13054-021-03570-0</prism:url>
         <prism:doi>10.1186/s13054-021-03570-0</prism:doi>
         <prism:issn>1364-8535</prism:issn>
         <prism:aggregationType>journal</prism:aggregationType>
         <prism:publicationName>Critical Care</prism:publicationName>
         <prism:copyright>The Author(s)</prism:copyright>
         <pdfx:CrossmarkMajorVersionDate>2010-04-23</pdfx:CrossmarkMajorVersionDate>
         <pdfx:CrossmarkDomainExclusive>true</pdfx:CrossmarkDomainExclusive>
         <pdfx:doi>10.1186/s13054-021-03570-0</pdfx:doi>
         <pdfx:robots>noindex</pdfx:robots>
         <pdfx:CrossMarkDomains>
            <rdf:Seq>
               <rdf:li>springer.com</rdf:li>
               <rdf:li>springerlink.com</rdf:li>
            </rdf:Seq>
         </pdfx:CrossMarkDomains>
         <xmpMM:DocumentID>uuid:a55f3b7d-9e9f-4420-a113-a2d00d2c4200</xmpMM:DocumentID>
         <xmpMM:InstanceID>uuid:208cee14-9b72-4b69-849b-9b5863725a50</xmpMM:InstanceID>
         <xmpMM:RenditionClass>default</xmpMM:RenditionClass>
         <xmpMM:VersionID>1</xmpMM:VersionID>
         <xmpMM:History>
            <rdf:Seq>
               <rdf:li rdf:parseType="Resource">
                  <stEvt:action>converted</stEvt:action>
                  <stEvt:instanceID>uuid:a55f3b7d-9e9f-4420-a113-a2d00d2c4200</stEvt:instanceID>
                  <stEvt:parameters>converted to PDF/A-2b</stEvt:parameters>
                  <stEvt:softwareAgent>pdfToolbox</stEvt:softwareAgent>
                  <stEvt:when>2021-05-14T02:07:18Z</stEvt:when>
               </rdf:li>
            </rdf:Seq>
         </xmpMM:History>
         <pdfaid:part>2</pdfaid:part>
         <pdfaid:conformance>B</pdfaid:conformance>
         <sn:authorInfo>
            <rdf:Bag>
               <rdf:li rdf:parseType="Resource">
                  <author:name> Luis Morales-Quinteros</author:name>
                  <author:orcid>http://orcid.org/0000-0002-8937-9824</author:orcid>
               </rdf:li>
            </rdf:Bag>
         </sn:authorInfo>
         <pdfaExtension:schemas>
            <rdf:Bag>
               <rdf:li rdf:parseType="Resource">
                  <pdfaSchema:namespaceURI>http://ns.adobe.com/pdfx/1.3/</pdfaSchema:namespaceURI>
                  <pdfaSchema:prefix>pdfx</pdfaSchema:prefix>
                  <pdfaSchema:schema>Adobe Document Info PDF eXtension Schema</pdfaSchema:schema>
                  <pdfaSchema:property>
                     <rdf:Seq>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>external</pdfaProperty:category>
                           <pdfaProperty:description>Mirrors crossmark:MajorVersionDate</pdfaProperty:description>
                           <pdfaProperty:name>CrossmarkMajorVersionDate</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>external</pdfaProperty:category>
                           <pdfaProperty:description>Mirrors crossmark:CrossmarkDomainExclusive</pdfaProperty:description>
                           <pdfaProperty:name>CrossmarkDomainExclusive</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Mirrors crossmark:DOI</pdfaProperty:description>
                           <pdfaProperty:name>doi</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>external</pdfaProperty:category>
                           <pdfaProperty:description>Mirrors crossmark:CrosMarkDomains</pdfaProperty:description>
                           <pdfaProperty:name>CrossMarkDomains</pdfaProperty:name>
                           <pdfaProperty:valueType>seq Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>A name object indicating whether the document has been modified to include trapping information</pdfaProperty:description>
                           <pdfaProperty:name>robots</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>ID of PDF/X standard</pdfaProperty:description>
                           <pdfaProperty:name>GTS_PDFXVersion</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Conformance level of PDF/X standard</pdfaProperty:description>
                           <pdfaProperty:name>GTS_PDFXConformance</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Company creating the PDF</pdfaProperty:description>
                           <pdfaProperty:name>Company</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Date when document was last modified</pdfaProperty:description>
                           <pdfaProperty:name>SourceModified</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                     </rdf:Seq>
                  </pdfaSchema:property>
               </rdf:li>
               <rdf:li rdf:parseType="Resource">
                  <pdfaSchema:namespaceURI>http://crossref.org/crossmark/1.0/</pdfaSchema:namespaceURI>
                  <pdfaSchema:prefix>crossmark</pdfaSchema:prefix>
                  <pdfaSchema:schema>Crossmark Schema</pdfaSchema:schema>
                  <pdfaSchema:property>
                     <rdf:Seq>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Usual same as prism:doi</pdfaProperty:description>
                           <pdfaProperty:name>DOI</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>external</pdfaProperty:category>
                           <pdfaProperty:description>The date when a publication was publishe.</pdfaProperty:description>
                           <pdfaProperty:name>MajorVersionDate</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>CrossmarkDomainExclusive</pdfaProperty:description>
                           <pdfaProperty:name>CrossmarkDomainExclusive</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>CrossMarkDomains</pdfaProperty:description>
                           <pdfaProperty:name>CrossMarkDomains</pdfaProperty:name>
                           <pdfaProperty:valueType>seq Text</pdfaProperty:valueType>
                        </rdf:li>
                     </rdf:Seq>
                  </pdfaSchema:property>
               </rdf:li>
               <rdf:li rdf:parseType="Resource">
                  <pdfaSchema:namespaceURI>http://prismstandard.org/namespaces/basic/2.0/</pdfaSchema:namespaceURI>
                  <pdfaSchema:prefix>prism</pdfaSchema:prefix>
                  <pdfaSchema:schema>Prism Schema</pdfaSchema:schema>
                  <pdfaSchema:property>
                     <rdf:Seq>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>external</pdfaProperty:category>
                           <pdfaProperty:description>This element provides the url for an article or unit of content. The attribute platform is optionally allowed for situations in which multiple URLs must be specified. PRISM recommends that a subset of the PCV platform values, namely “mobile” and “web”, be used in conjunction with this element. NOTE: PRISM recommends against the use of the #other value allowed in the PRISM Platform controlled vocabulary. In lieu of using #other please reach out to the PRISM group at prism-wg@yahoogroups.com to request addition of your term to the Platform Controlled Vocabulary.</pdfaProperty:description>
                           <pdfaProperty:name>url</pdfaProperty:name>
                           <pdfaProperty:valueType>URI</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>external</pdfaProperty:category>
                           <pdfaProperty:description>The Digital Object Identifier for the article.
The DOI may also be used as the dc:identifier. If used as a dc:identifier, the URI form should be captured, and the bare identifier should also be captured using prism:doi. If an alternate unique identifier is used as the required dc:identifier, then the DOI should be specified as a bare identifier within prism:doi only. If the URL associated with a DOI is to be specified, then prism:url may be used in conjunction with prism:doi in order to provide the service endpoint (i.e. the URL). </pdfaProperty:description>
                           <pdfaProperty:name>doi</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>external</pdfaProperty:category>
                           <pdfaProperty:description>ISSN for an electronic version of the issue in which the resource occurs. Permits publishers to include a second ISSN, identifying an electronic version of the issue in which the resource occurs (therefore e(lectronic)Issn. If used, prism:eIssn MUST contain the ISSN of the electronic version.</pdfaProperty:description>
                           <pdfaProperty:name>issn</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Volume number</pdfaProperty:description>
                           <pdfaProperty:name>volume</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Issue number</pdfaProperty:description>
                           <pdfaProperty:name>number</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Starting page</pdfaProperty:description>
                           <pdfaProperty:name>startingPage</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Ending page</pdfaProperty:description>
                           <pdfaProperty:name>endingPage</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>external</pdfaProperty:category>
                           <pdfaProperty:description>The aggregation type specifies the unit of aggregation for a content collection. Comment PRISM recommends that the PRISM Aggregation Type Controlled Vocabulary be used to provide values for this element. Note: PRISM recommends against the use of the #other value currently allowed in this controlled vocabulary. In lieu of using #other please reach out to the PRISM group at info@prismstandard.org to request addition of your term to the Aggregation Type Controlled Vocabulary. </pdfaProperty:description>
                           <pdfaProperty:name>aggregationType</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>external</pdfaProperty:category>
                           <pdfaProperty:description>Title of the magazine, or other publication, in which a resource was/will be published. Typically this will be used to provide the name of the magazine an article appeared in as metadata for the article, along with information such as the article title, the publisher, volume, number, and cover date. Note: Publication name can be used to differentiate between a print magazine and the online version if the names are different such as “magazine” and “magazine.com.”</pdfaProperty:description>
                           <pdfaProperty:name>publicationName</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>external</pdfaProperty:category>
                           <pdfaProperty:description>Copyright</pdfaProperty:description>
                           <pdfaProperty:name>copyright</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                     </rdf:Seq>
                  </pdfaSchema:property>
               </rdf:li>
               <rdf:li rdf:parseType="Resource">
                  <pdfaSchema:namespaceURI>http://ns.adobe.com/pdf/1.3/</pdfaSchema:namespaceURI>
                  <pdfaSchema:prefix>pdf</pdfaSchema:prefix>
                  <pdfaSchema:schema>Adobe PDF Schema</pdfaSchema:schema>
                  <pdfaSchema:property>
                     <rdf:Seq>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>A name object indicating whether the document has been modified to include trapping information</pdfaProperty:description>
                           <pdfaProperty:name>Trapped</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                     </rdf:Seq>
                  </pdfaSchema:property>
               </rdf:li>
               <rdf:li rdf:parseType="Resource">
                  <pdfaSchema:namespaceURI>http://ns.adobe.com/xap/1.0/mm/</pdfaSchema:namespaceURI>
                  <pdfaSchema:prefix>xmpMM</pdfaSchema:prefix>
                  <pdfaSchema:schema>XMP Media Management Schema</pdfaSchema:schema>
                  <pdfaSchema:property>
                     <rdf:Seq>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>UUID based identifier for specific incarnation of a document</pdfaProperty:description>
                           <pdfaProperty:name>InstanceID</pdfaProperty:name>
                           <pdfaProperty:valueType>URI</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>The common identifier for all versions and renditions of a document.</pdfaProperty:description>
                           <pdfaProperty:name>DocumentID</pdfaProperty:name>
                           <pdfaProperty:valueType>URI</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>The common identifier for all versions and renditions of a document.</pdfaProperty:description>
                           <pdfaProperty:name>OriginalDocumentID</pdfaProperty:name>
                           <pdfaProperty:valueType>URI</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>A reference to the original document from which this one is derived. It is a minimal reference; missing components can be assumed to be unchanged. For example, a new version might only need to specify the instance ID and version number of the previous version, or a rendition might only need to specify the instance ID and rendition class of the original.</pdfaProperty:description>
                           <pdfaProperty:name>DerivedFrom</pdfaProperty:name>
                           <pdfaProperty:valueType>ResourceRef</pdfaProperty:valueType>
                        </rdf:li>
                     </rdf:Seq>
                  </pdfaSchema:property>
                  <pdfaSchema:valueType>
                     <rdf:Seq>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaType:description>Identifies a portion of a document. This can be a position at which the document has been changed since the most recent event history (stEvt:changed). For a resource within an xmpMM:Ingredients list, the ResourceRef uses this type to identify both the portion of the containing document that refers to the resource, and the portion of the referenced resource that is referenced.</pdfaType:description>
                           <pdfaType:namespaceURI>http://ns.adobe.com/xap/1.0/sType/Part#</pdfaType:namespaceURI>
                           <pdfaType:prefix>stPart</pdfaType:prefix>
                           <pdfaType:type>Part</pdfaType:type>
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                     </rdf:Seq>
                  </pdfaSchema:valueType>
               </rdf:li>
               <rdf:li rdf:parseType="Resource">
                  <pdfaSchema:namespaceURI>http://www.aiim.org/pdfa/ns/id/</pdfaSchema:namespaceURI>
                  <pdfaSchema:prefix>pdfaid</pdfaSchema:prefix>
                  <pdfaSchema:schema>PDF/A ID Schema</pdfaSchema:schema>
                  <pdfaSchema:property>
                     <rdf:Seq>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Part of PDF/A standard</pdfaProperty:description>
                           <pdfaProperty:name>part</pdfaProperty:name>
                           <pdfaProperty:valueType>Integer</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Amendment of PDF/A standard</pdfaProperty:description>
                           <pdfaProperty:name>amd</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                        <rdf:li rdf:parseType="Resource">
                           <pdfaProperty:category>internal</pdfaProperty:category>
                           <pdfaProperty:description>Conformance level of PDF/A standard</pdfaProperty:description>
                           <pdfaProperty:name>conformance</pdfaProperty:name>
                           <pdfaProperty:valueType>Text</pdfaProperty:valueType>
                        </rdf:li>
                     </rdf:Seq>
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