<?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 Science (OCW, Ministerie van Onderwijs, Cultuur en Wetenschap)
  Architecture: NT13 
  Version: 20190220.b
  Released by: Dienst Uitvoering Onderwijs (DUO)
  Release date: Fri Oct 26 09:17:55 CET 2018
-->
<link:linkbase xmlns:gen="http://xbrl.org/2008/generic" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:va="http://xbrl.org/2008/assertion/value" xmlns:validation="http://xbrl.org/2008/validation" xmlns:variable="http://xbrl.org/2008/variable" xmlns:xbrli="http://www.xbrl.org/2003/instance" 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   http://xbrl.org/2008/validation http://www.xbrl.org/2008/validation.xsd   http://xbrl.org/2008/variable http://www.xbrl.org/2008/variable.xsd   http://xbrl.org/2008/assertion/value http://www.xbrl.org/2008/value-assertion.xsd   ">
	<link:arcroleRef arcroleURI="http://xbrl.org/arcrole/2008/variable-set" xlink:href="http://www.xbrl.org/2008/variable.xsd#variable-set" xlink:type="simple"/>
	<link:arcroleRef arcroleURI="http://xbrl.org/arcrole/2008/assertion-set" xlink:href="http://www.xbrl.org/2008/validation.xsd#assertion-set" xlink:type="simple"/>
	<link:arcroleRef arcroleURI="http://xbrl.org/arcrole/2016/assertion-unsatisfied-severity" xlink:href="http://www.xbrl.org/2016/assertion-severity.xsd#assertion-unsatisfied-severity" 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">
		<validation:assertionSet id="assertion-set-general" xlink:label="assertion-set-general" xlink:type="resource"/>
		<gen:arc xlink:arcrole="http://xbrl.org/arcrole/2008/assertion-set" xlink:from="assertion-set-general" xlink:to="va-BR-OCW-S.1-scheme" xlink:type="arc"/>
		<gen:arc xlink:arcrole="http://xbrl.org/arcrole/2008/assertion-set" xlink:from="assertion-set-general" xlink:to="va-BR-OCW-S.2-identifier" xlink:type="arc"/>
		<gen:arc xlink:arcrole="http://xbrl.org/arcrole/2008/assertion-set" xlink:from="assertion-set-general" xlink:to="va-BR-OCW-S.3-identifier-consistent" xlink:type="arc"/>
		<gen:arc xlink:arcrole="http://xbrl.org/arcrole/2008/assertion-set" xlink:from="assertion-set-general" xlink:to="va-BR-OCW-S.4-decimals" xlink:type="arc"/>
		<va:valueAssertion aspectModel="dimensional" id="va-BR-OCW-S.1-scheme" implicitFiltering="false" test="count($IdentifiersWithInvalidSchemeValue) eq 0" xlink:label="va-BR-OCW-S.1-scheme" xlink:type="resource"/>
		<variable:variableArc name="IdentifiersWithInvalidSchemeValue" xlink:arcrole="http://xbrl.org/arcrole/2008/variable-set" xlink:from="va-BR-OCW-S.1-scheme" xlink:to="v_IdentifiersWithInvalidSchemeValue" xlink:type="arc"/>
		<variable:generalVariable bindAsSequence="true" select="/xbrli:xbrl/xbrli:context/xbrli:entity/xbrli:identifier[not(@scheme) or not(@scheme = 'http://www.duo.nl/bevoegdgezagnummer')]" xlink:label="v_IdentifiersWithInvalidSchemeValue" xlink:type="resource"/>
		<gen:arc xlink:arcrole="http://xbrl.org/arcrole/2016/assertion-unsatisfied-severity" xlink:from="va-BR-OCW-S.1-scheme" xlink:to="sev_ERROR_loc" xlink:type="arc"/>
		<va:valueAssertion aspectModel="dimensional" id="va-BR-OCW-S.2-identifier" implicitFiltering="false" test="count($IdentifiersWithInvalidContent) eq 0" xlink:label="va-BR-OCW-S.2-identifier" xlink:type="resource"/>
		<variable:variableArc name="IdentifiersWithInvalidContent" xlink:arcrole="http://xbrl.org/arcrole/2008/variable-set" xlink:from="va-BR-OCW-S.2-identifier" xlink:to="v_IdentifiersWithInvalidContent" xlink:type="arc"/>
		<variable:generalVariable bindAsSequence="true" select="/xbrli:xbrl/xbrli:context/xbrli:entity/xbrli:identifier[not(matches(., '^[\w\d]{1,10}$'))]" xlink:label="v_IdentifiersWithInvalidContent" xlink:type="resource"/>
		<gen:arc xlink:arcrole="http://xbrl.org/arcrole/2016/assertion-unsatisfied-severity" xlink:from="va-BR-OCW-S.2-identifier" xlink:to="sev_ERROR_loc" xlink:type="arc"/>
		<va:valueAssertion aspectModel="dimensional" id="va-BR-OCW-S.3-identifier-consistent" implicitFiltering="false" test="count($IdentifierUniqueContentValues) eq 1" xlink:label="va-BR-OCW-S.3-identifier-consistent" xlink:type="resource"/>
		<variable:variableArc name="IdentifierUniqueContentValues" xlink:arcrole="http://xbrl.org/arcrole/2008/variable-set" xlink:from="va-BR-OCW-S.3-identifier-consistent" xlink:to="v_IdentifierUniqueContentValues" xlink:type="arc"/>
		<variable:generalVariable bindAsSequence="true" select="distinct-values(/xbrli:xbrl/xbrli:context/xbrli:entity/xbrli:identifier)" xlink:label="v_IdentifierUniqueContentValues" xlink:type="resource"/>
		<gen:arc xlink:arcrole="http://xbrl.org/arcrole/2016/assertion-unsatisfied-severity" xlink:from="va-BR-OCW-S.3-identifier-consistent" xlink:to="sev_ERROR_loc" xlink:type="arc"/>
		<va:valueAssertion aspectModel="dimensional" id="va-BR-OCW-S.4-decimals" implicitFiltering="false" test="count($ItemsWithInvalidDecimalsValue) eq 0" xlink:label="va-BR-OCW-S.4-decimals" xlink:type="resource"/>
		<variable:variableArc name="ItemsWithInvalidDecimalsValue" xlink:arcrole="http://xbrl.org/arcrole/2008/variable-set" xlink:from="va-BR-OCW-S.4-decimals" xlink:to="v_ItemsWithInvalidDecimalsValue" xlink:type="arc"/>
		<variable:generalVariable bindAsSequence="true" select="/xbrli:xbrl//*[(@precision or @decimals) and not(@decimals = 'INF')]" xlink:label="v_ItemsWithInvalidDecimalsValue" xlink:type="resource"/>
		<gen:arc xlink:arcrole="http://xbrl.org/arcrole/2016/assertion-unsatisfied-severity" xlink:from="va-BR-OCW-S.4-decimals" xlink:to="sev_ERROR_loc" xlink:type="arc"/>
		<link:loc xlink:href="http://www.xbrl.org/2016/severities.xml#ERROR" xlink:label="sev_ERROR_loc" xlink:type="locator"/>
	</gen:link>
</link:linkbase>