<?xml version="1.0" encoding="utf-8"?>
<!--
  This file is part of the OCW taxonomy, which is an extension on the Dutch taxonomy (NT, Nederlandse Taxonomie) 
  Intellectual Property of the State of the Netherlands, Ministry of Culture, Education and Sciences (OCW, Ministerie van Onderwijs, Cultuur en Wetenschappen)
  Architecture: NT13 
  Version: 20190220.a
  Released by: Dienst Uitvoering Onderwijs (DUO)
  Release date: Mon Aug 27 08:07:52 CET 2018
-->
<link:linkbase xmlns:gen="http://xbrl.org/2008/generic" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xbrl.org/2008/generic http://www.xbrl.org/2008/generic-link.xsd">
	<link:arcroleRef arcroleURI="http://www.xbrl.org/2013/arcrole/parent-child" xlink:href="http://www.xbrl.org/lrr/arcrole/parent-child-2013-09-19.xsd#parent-child" xlink:type="simple"/>
	<link:roleRef roleURI="http://www.xbrl.org/2008/role/link" xlink:href="http://www.xbrl.org/2008/generic-link.xsd#standard-link-role" xlink:type="simple"/>
	<gen:link xlink:role="http://www.xbrl.org/2008/role/link" xlink:type="extended">
		<link:loc xlink:href="ocw-wnt-abstracts.xsd#ocw-wnt-abstr_WNTReportTitle" xlink:label="ocw-wnt-abstr_WNTReportTitle_loc" xlink:type="locator"/>
		<link:loc xlink:href="ocw-abstracts.xsd#ocw-abstr_GeneralInformationTitle" xlink:label="ocw-abstr_GeneralInformationTitle_loc" xlink:type="locator"/>
		<gen:arc order="1" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-wnt-abstr_WNTReportTitle_loc" xlink:to="ocw-abstr_GeneralInformationTitle_loc" xlink:type="arc"/>
		<link:loc xlink:href="../dictionary/ocw-wnt-linkroles.xsd#ocw-wnt-lr_EntityInformation" xlink:label="ocw-wnt-lr_EntityInformation_loc" xlink:type="locator"/>
		<gen:arc order="2" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-abstr_GeneralInformationTitle_loc" xlink:to="ocw-wnt-lr_EntityInformation_loc" xlink:type="arc"/>
		<link:loc xlink:href="../dictionary/ocw-wnt-linkroles.xsd#ocw-wnt-lr_RemunerationExecutivesGeneralConcise" xlink:label="ocw-wnt-lr_RemunerationExecutivesGeneralConcise_loc" xlink:type="locator"/>
		<gen:arc order="3" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-abstr_GeneralInformationTitle_loc" xlink:to="ocw-wnt-lr_RemunerationExecutivesGeneralConcise_loc" xlink:type="arc"/>
		<link:loc xlink:href="ocw-wnt-abstracts.xsd#ocw-wnt-abstr_RemunerationTopExecutivesTitle" xlink:label="ocw-wnt-abstr_RemunerationTopExecutivesTitle_loc" xlink:type="locator"/>
		<gen:arc order="4" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-wnt-abstr_WNTReportTitle_loc" xlink:to="ocw-wnt-abstr_RemunerationTopExecutivesTitle_loc" xlink:type="arc"/>
		<link:loc xlink:href="../dictionary/ocw-wnt-linkroles.xsd#ocw-wnt-lr_RemunerationManagingTopExecutivesWithEmploymentRelationshipOrWithoutFromMonth13AndFormerSpecification" xlink:label="ocw-wnt-lr_RemunerationManagingTopExecutivesWithEmploymentRelationshipOrWithoutFromMonth13AndFormerSpecification_loc" xlink:type="locator"/>
		<gen:arc order="5" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-wnt-abstr_RemunerationTopExecutivesTitle_loc" xlink:to="ocw-wnt-lr_RemunerationManagingTopExecutivesWithEmploymentRelationshipOrWithoutFromMonth13AndFormerSpecification_loc" xlink:type="arc"/>
		<link:loc xlink:href="../dictionary/ocw-wnt-linkroles.xsd#ocw-wnt-lr_RemunerationManagingTopExecutivesWithoutEmploymentRelationshipMonth1to12Specification" xlink:label="ocw-wnt-lr_RemunerationManagingTopExecutivesWithoutEmploymentRelationshipMonth1to12Specification_loc" xlink:type="locator"/>
		<gen:arc order="6" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-wnt-abstr_RemunerationTopExecutivesTitle_loc" xlink:to="ocw-wnt-lr_RemunerationManagingTopExecutivesWithoutEmploymentRelationshipMonth1to12Specification_loc" xlink:type="arc"/>
		<link:loc xlink:href="../dictionary/ocw-wnt-linkroles.xsd#ocw-wnt-lr_RemunerationSupervisingTopExecutivesSpecification" xlink:label="ocw-wnt-lr_RemunerationSupervisingTopExecutivesSpecification_loc" xlink:type="locator"/>
		<gen:arc order="7" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-wnt-abstr_RemunerationTopExecutivesTitle_loc" xlink:to="ocw-wnt-lr_RemunerationSupervisingTopExecutivesSpecification_loc" xlink:type="arc"/>
		<link:loc xlink:href="../dictionary/ocw-wnt-linkroles.xsd#ocw-wnt-lr_RemunerationTopExecutivesBelowDisclosureThresholdSpecification" xlink:label="ocw-wnt-lr_RemunerationTopExecutivesBelowDisclosureThresholdSpecification_loc" xlink:type="locator"/>
		<gen:arc order="8" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-wnt-abstr_RemunerationTopExecutivesTitle_loc" xlink:to="ocw-wnt-lr_RemunerationTopExecutivesBelowDisclosureThresholdSpecification_loc" xlink:type="arc"/>
		<link:loc xlink:href="../dictionary/ocw-wnt-linkroles.xsd#ocw-wnt-lr_NotesListingRemunerationTopExecutives" xlink:label="ocw-wnt-lr_NotesListingRemunerationTopExecutives_loc" xlink:type="locator"/>
		<gen:arc order="9" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-wnt-abstr_RemunerationTopExecutivesTitle_loc" xlink:to="ocw-wnt-lr_NotesListingRemunerationTopExecutives_loc" xlink:type="arc"/>
		<link:loc xlink:href="ocw-wnt-abstracts.xsd#ocw-wnt-abstr_RemunerationNonTopExecutivesExceedingNormTitle" xlink:label="ocw-wnt-abstr_RemunerationNonTopExecutivesExceedingNormTitle_loc" xlink:type="locator"/>
		<gen:arc order="10" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-wnt-abstr_WNTReportTitle_loc" xlink:to="ocw-wnt-abstr_RemunerationNonTopExecutivesExceedingNormTitle_loc" xlink:type="arc"/>
		<link:loc xlink:href="../dictionary/ocw-wnt-linkroles.xsd#ocw-wnt-lr_NotesListingRemunerationTopExecutivesAboveNormSpecification" xlink:label="ocw-wnt-lr_NotesListingRemunerationTopExecutivesAboveNormSpecification_loc" xlink:type="locator"/>
		<gen:arc order="11" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-wnt-abstr_RemunerationNonTopExecutivesExceedingNormTitle_loc" xlink:to="ocw-wnt-lr_NotesListingRemunerationTopExecutivesAboveNormSpecification_loc" xlink:type="arc"/>
		<link:loc xlink:href="../dictionary/ocw-wnt-linkroles.xsd#ocw-wnt-lr_NotesListingRemunerationTopExecutivesAboveNormDisclosure" xlink:label="ocw-wnt-lr_NotesListingRemunerationTopExecutivesAboveNormDisclosure_loc" xlink:type="locator"/>
		<gen:arc order="12" xlink:arcrole="http://www.xbrl.org/2013/arcrole/parent-child" xlink:from="ocw-wnt-abstr_RemunerationNonTopExecutivesExceedingNormTitle_loc" xlink:to="ocw-wnt-lr_NotesListingRemunerationTopExecutivesAboveNormDisclosure_loc" xlink:type="arc"/>
	</gen:link>
</link:linkbase>