<?xml version="1.0" encoding="UTF-8"?>
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" 
    xmlns:gen="http://xbrl.org/2008/generic"
    xmlns:xlink="http://www.w3.org/1999/xlink"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:sev="http://xbrl.org/PR/2015-11-18/assertion-severity"
    xsi:schemaLocation="http://xbrl.org/2008/generic http://www.xbrl.org/2008/generic-link.xsd
    http://xbrl.org/PR/2015-11-18/assertion-severity http://www.xbrl.org/PR/2015-11-18/assertion-severity.xsd"
    >
   
   <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">
    
    <sev:severity id="ERROR" level="ERROR" xlink:label="severity_error" xlink:type="resource" />
          
    <sev:severity id="WARNING" level="WARNING" xlink:label="severity_warning" xlink:type="resource"/>
    
    <sev:severity id="OK" level="OK" xlink:label="severity_ok" xlink:type="resource"/>
    
   </gen:link>
   
</link:linkbase>