<?xml version="1.0" encoding="UTF-8"?>
<!--
  ~ Copyright (C) 2001-2016 Food and Agriculture Organization of the
  ~ United Nations (FAO-UN), United Nations World Food Programme (WFP)
  ~ and United Nations Environment Programme (UNEP)
  ~
  ~ This program is free software; you can redistribute it and/or modify
  ~ it under the terms of the GNU General Public License as published by
  ~ the Free Software Foundation; either version 2 of the License, or (at
  ~ your option) any later version.
  ~
  ~ This program is distributed in the hope that it will be useful, but
  ~ WITHOUT ANY WARRANTY; without even the implied warranty of
  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  ~ General Public License for more details.
  ~
  ~ You should have received a copy of the GNU General Public License
  ~ along with this program; if not, write to the Free Software
  ~ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  ~
  ~ Contact: Jeroen Ticheler - FAO - Viale delle Terme di Caracalla 2,
  ~ Rome - Italy. email: geonetwork@osgeo.org
  -->

<sch:schema xmlns:sch="http://purl.oclc.org/dsdl/schematron"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

    <sch:title xmlns="http://www.w3.org/2001/XMLSchema">GeoNetwork recommendations</sch:title>
    <sch:ns prefix="gmd" uri="http://www.isotc211.org/2005/gmd"/>
    <sch:ns prefix="srv" uri="http://www.isotc211.org/2005/srv"/>
    <sch:ns prefix="gco" uri="http://www.isotc211.org/2005/gco"/>
    <sch:ns prefix="geonet" uri="http://www.fao.org/geonetwork"/>
    <sch:ns prefix="xlink" uri="http://www.w3.org/1999/xlink"/>

    <!-- =============================================================
    GeoNetwork schematron rules:
    ============================================================= -->
    <sch:pattern>
        <sch:title>$loc/strings/M500</sch:title>
        <sch:rule
            context="//gmd:MD_Metadata|//*[@gco:isoType='gmd:MD_Metadata']">
        	<sch:let name="language"
                   value="gmd:language/gco:CharacterString|gmd:language/gmd:LanguageCode/@codeListValue"/>
          <sch:let name="localeAndNoLanguage"
                   value="gmd:locale and (gmd:language/@gco:nilReason='missing' or not(gmd:language))"/>

          <!--  Check that main language is not defined and gmd:locale element exist. -->
          <sch:assert test="not($localeAndNoLanguage)"
              >$loc/strings/alert.M500</sch:assert>
          <sch:report test="not($localeAndNoLanguage)"
              ><sch:value-of select="$loc/strings/report.M500"/> "<sch:value-of select="normalize-space($language)"/>"</sch:report>
        </sch:rule>
    </sch:pattern>
</sch:schema>