From eddb95b8d760667cbdea2c2859ea31d2a958724e Mon Sep 17 00:00:00 2001
From: Lara Ferrighi <laraf@met.no>
Date: Fri, 6 Mar 2026 00:36:21 +0100
Subject: [PATCH 1/2] update dcat-to-mmd

---
 xslt/dcat-to-mmd.xsl | 670 +++++++++++++++++++++++++++----------------
 1 file changed, 430 insertions(+), 240 deletions(-)

diff --git a/xslt/dcat-to-mmd.xsl b/xslt/dcat-to-mmd.xsl
index 4b76b52..d06117e 100644
--- a/xslt/dcat-to-mmd.xsl
+++ b/xslt/dcat-to-mmd.xsl
@@ -1,11 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-
 <!--
 Draft implementation of dcat to mmd mapping
 -->
-
-<xsl:stylesheet 
-    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
     xmlns:mmd="http://www.met.no/schema/mmd"
     xmlns:dct="http://purl.org/dc/terms/"
     xmlns:gml="http://www.opengis.net/gml"
@@ -25,379 +22,572 @@ Draft implementation of dcat to mmd mapping
     xmlns:dif="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/"
     version="1.0">
     <xsl:output method="xml" encoding="UTF-8" indent="yes"/>
-
+    <xsl:variable name="isoLUD" select="document('../thesauri/mmd-vocabulary.xml')"/>
+    <xsl:key name="usec" match="skos:Collection[@rdf:about='https://vocab.met.no/mmd/Use_Constraint']/skos:member/skos:Concept" use="skos:prefLabel"/>
+    <xsl:key name="useca" match="skos:Collection[@rdf:about='https://vocab.met.no/mmd/Use_Constraint']/skos:member/skos:Concept" use="skos:altLabel"/>
+    <xsl:key name="usecexact" match="skos:Collection[@rdf:about='https://vocab.met.no/mmd/Use_Constraint']/skos:member/skos:Concept/skos:exactMatch" use="substring-after(@rdf:resource, '://')"/>
     <xsl:template match="/rdf:RDF">
         <xsl:element name="mmd:mmd">
-            <xsl:apply-templates select="dcat:Dataset" />
+            <xsl:apply-templates select="dcat:Dataset"/>
         </xsl:element>
     </xsl:template>
-
-
     <xsl:template match="dcat:Dataset">
-        <!--Mandatory for Dataset-->    
-        <xsl:apply-templates select="dct:title" />
-        <xsl:apply-templates select="dct:description" />
-        <!--Recommended for Dataset-->    
-        <xsl:apply-templates select="dcat:contactPoint" />
-	<!--create also investigator, unique in dcat-->
+        <xsl:apply-templates select="dct:identifier"/>
+        <xsl:apply-templates select="dct:title"/>
+        <xsl:apply-templates select="dct:description"/>
+        <xsl:element name="mmd:metadata_status">
+            <xsl:text>Active</xsl:text>
+        </xsl:element>
+        <xsl:element name="mmd:dataset_production_status">
+            <xsl:text>Not available</xsl:text>
+        </xsl:element>
+        <xsl:element name="mmd:collection">
+            <xsl:text>ADC</xsl:text>
+        </xsl:element>
+        <xsl:element name="mmd:last_metadata_update">
+            <xsl:if test="dct:issued">
+                <xsl:element name="mmd:update">
+                    <xsl:element name="mmd:datetime">
+                        <xsl:value-of select="dct:issued"/>
+                    </xsl:element>
+                    <xsl:element name="mmd:type">
+                        <xsl:text>Created</xsl:text>
+                    </xsl:element>
+                </xsl:element>
+            </xsl:if>
+            <xsl:if test="dct:modified">
+                <xsl:element name="mmd:update">
+                    <xsl:element name="mmd:datetime">
+                        <xsl:value-of select="dct:modified"/>
+                    </xsl:element>
+                    <xsl:element name="mmd:type">
+                        <xsl:text>Major modification</xsl:text>
+                    </xsl:element>
+                    <xsl:element name="mmd:note">
+                        <xsl:text>Information caputured from DCAT record</xsl:text>
+                    </xsl:element>
+                </xsl:element>
+            </xsl:if>
+        </xsl:element>
+        <xsl:apply-templates select="dct:temporal"/>
+        <xsl:element name="mmd:iso_topic_category">
+            <xsl:text>Not available</xsl:text>
+        </xsl:element>
+        <xsl:element name="mmd:keywords">
+            <xsl:attribute name="vocabulary">None</xsl:attribute>
+            <xsl:for-each select="dcat:keyword">
+                <xsl:element name="mmd:keyword">
+                    <xsl:value-of select="."/>
+                </xsl:element>
+            </xsl:for-each>
+            <xsl:for-each select="schema:variableMeasured">
+                <xsl:element name="mmd:keyword">
+                    <xsl:value-of select="schema:PropertyValue/schema:name"/>
+                </xsl:element>
+            </xsl:for-each>
+        </xsl:element>
+        <xsl:apply-templates select="dcat:contactPoint"/>
+        <!--create also investigator, unique in dcat-->
         <xsl:if test="dct:creator/foaf:Agent">
-	    <xsl:element name="mmd:personnel">
-	        <xsl:element name="mmd:role">
-	            <xsl:text>Investigator</xsl:text>
+            <xsl:element name="mmd:personnel">
+                <xsl:element name="mmd:role">
+                    <xsl:text>Investigator</xsl:text>
                 </xsl:element>
                 <xsl:element name="mmd:name">
-	            <xsl:value-of select="dct:creator/foaf:Agent/foaf:name" />
+                    <xsl:value-of select="dct:creator/foaf:Agent/foaf:name"/>
                 </xsl:element>
                 <xsl:element name="mmd:email">
-	            <xsl:value-of select="dct:creator/foaf:Agent/foaf:mbox" />
+                    <xsl:value-of select="dct:creator/foaf:Agent/foaf:mbox"/>
                 </xsl:element>
                 <xsl:element name="mmd:organization">
-	            <xsl:value-of select="dct:creator/foaf:Agent/org:memberOf/foaf:Organization/foaf:name" />
+                    <xsl:value-of select="dct:creator/foaf:Agent/org:memberOf/foaf:Organization/foaf:name"/>
                 </xsl:element>
             </xsl:element>
         </xsl:if>
-	<xsl:for-each select="dcat:distribution">
-            <xsl:apply-templates select="dcat:Distribution" />
+        <xsl:for-each select="dcat:distribution">
+            <xsl:apply-templates select="dcat:Distribution"/>
         </xsl:for-each>
-	<!--in dcat license apply to distribution not dataset. We can't get the use_constraint in mmd -->
-        <xsl:element name="mmd:keywords">
-            <xsl:attribute name="vocabulary">None</xsl:attribute>
-	    <xsl:for-each select="dcat:keyword">
-                <xsl:element name="mmd:keyword">
-                    <xsl:value-of select="." />
-                </xsl:element>
-            </xsl:for-each>
-        </xsl:element>
-        <xsl:element name="mmd:dataset_citation">
+        <!--in dcat license apply to distribution not dataset. We can't get the use_constraint in mmd -->
+        <!--xsl:element name="mmd:dataset_citation">
             <xsl:element name="mmd:author">
                 <xsl:apply-templates select="dct:creator" />
             </xsl:element>
             <xsl:element name="mmd:publisher">
 		    <xsl:apply-templates select="dct:publisher" />
             </xsl:element>
-            <xsl:element name="mmd:publication_date">
-		<xsl:value-of select="substring(dct:issued, 1, 10)" />
-            </xsl:element>
+        </xsl:element-->
+        <xsl:apply-templates select="dct:spatial"/>
+        <!--Optional for Dataset-->
+        <!--xsl:apply-templates select="dct:accessRights" /-->
+        <xsl:apply-templates select="schema:license"/>
+        <xsl:apply-templates select="dcat:landingPage"/>
+        <xsl:apply-templates select="foaf:page"/>
+        <xsl:element name="mmd:metadata_source">
+            <xsl:text>External-Harvest</xsl:text>
         </xsl:element>
-        <xsl:apply-templates select="dct:spatial" />
-        <xsl:apply-templates select="dct:temporal" />
-        <!--Optional for Dataset-->    
-	<xsl:apply-templates select="dct:accessRights" />
-	<xsl:apply-templates select="dct:identifier" />
-	<xsl:apply-templates select="dcat:landingPage" />
-	<xsl:apply-templates select="foaf:page" />
-	<xsl:apply-templates select="dct:language" />
-	<!--probably mapping to alternate_identifier-->
-	<!--xsl:apply-templates select="adms:identifier" /-->
-    <xsl:element name="mmd:metadata_source">
-        <xsl:text>External-Harvest</xsl:text>
-    </xsl:element>
     </xsl:template>
-    
-
     <xsl:template match="dct:title">
         <xsl:element name="mmd:title">
             <xsl:attribute name="xml:lang">en</xsl:attribute>
-            <xsl:value-of select="." />
+            <xsl:value-of select="."/>
         </xsl:element>
     </xsl:template>
-
     <xsl:template match="dct:description">
         <xsl:element name="mmd:abstract">
             <xsl:attribute name="xml:lang">en</xsl:attribute>
-            <xsl:value-of select="." />
+            <xsl:value-of select="."/>
         </xsl:element>
     </xsl:template>
-
     <xsl:template match="dcat:contactPoint">
-	<xsl:if test="vcard:Organization">
-            <xsl:element name="mmd:personnel">
-              <xsl:element name="mmd:role">
-	          <xsl:text>Technical contact</xsl:text>
-              </xsl:element>
-              <xsl:element name="mmd:name">
-		  <xsl:value-of select="vcard:Organization/vcard:fn" />
-              </xsl:element>
-              <xsl:element name="mmd:email">
-		  <xsl:choose>
-		  <xsl:when test="vcard:Organization/vcard:hasEmail/@rdf:resource">
-		      <xsl:value-of select="substring-after(vcard:Organization/vcard:hasEmail/@rdf:resource, 'mailto:')" />
-	          </xsl:when>
-	          <xsl:otherwise>
-		      <xsl:value-of select="vcard:Organization/vcard:hasEmail" />
-	          </xsl:otherwise>
-	          </xsl:choose>
-              </xsl:element>
-            </xsl:element>
+        <xsl:if test="vcard:Organization">
+            <xsl:if test="not(contains(vcard:Organization/vcard:fn, 'author'))">
+                <xsl:element name="mmd:personnel">
+                    <xsl:element name="mmd:role">
+                        <xsl:text>Technical contact</xsl:text>
+                    </xsl:element>
+                    <xsl:element name="mmd:name">
+                        <xsl:value-of select="vcard:Organization/vcard:fn"/>
+                    </xsl:element>
+                    <xsl:element name="mmd:email">
+                        <xsl:choose>
+                            <xsl:when test="vcard:Organization/vcard:hasEmail/@rdf:resource">
+                                <xsl:value-of select="substring-after(vcard:Organization/vcard:hasEmail/@rdf:resource, 'mailto:')"/>
+                            </xsl:when>
+                            <xsl:otherwise>
+                                <xsl:value-of select="vcard:Organization/vcard:hasEmail"/>
+                            </xsl:otherwise>
+                        </xsl:choose>
+                    </xsl:element>
+                </xsl:element>
+            </xsl:if>
         </xsl:if>
     </xsl:template>
 
     <xsl:template match="dcat:Distribution">
-	<xsl:if test="dcat:downloadURL">
+        <xsl:if test="dcat:downloadURL">
             <xsl:element name="mmd:data_access">
                 <xsl:element name="mmd:type">
-		    <xsl:text>HTTP</xsl:text>
+                    <xsl:text>HTTP</xsl:text>
                 </xsl:element>
                 <!--xsl:element name="mmd:name">
                     <xsl:value-of select="." />
                 </xsl:element-->
-		<!--this is probably the description of the distribution, not really matching the description of the data access as in mmd-->
+                <!--this is probably the description of the distribution, not really matching the description of the data access as in mmd-->
                 <xsl:element name="mmd:description">
-	    	<xsl:value-of select="dct:description" />
+                    <xsl:value-of select="dct:description"/>
                 </xsl:element>
                 <xsl:element name="mmd:resource">
-	            <xsl:value-of select="@rdf:resource" />
+                    <xsl:value-of select="@rdf:resource"/>
                 </xsl:element>
             </xsl:element>
         </xsl:if>
     </xsl:template>
-
     <xsl:template match="dct:creator">
         <!--This can be in different format, as resource for example-->
         <xsl:if test="foaf:Organization">
-            <xsl:value-of select="foaf:Organization/foaf:name" />
+            <xsl:value-of select="foaf:Organization/foaf:name"/>
         </xsl:if>
         <xsl:if test="foaf:Agent">
-            <xsl:value-of select="foaf:Agent/foaf:name" />
+            <xsl:value-of select="foaf:Agent/foaf:name"/>
         </xsl:if>
     </xsl:template>
-   
     <xsl:template match="dct:publisher">
         <!--This can be in different format, as resource for example-->
         <xsl:if test="foaf:Organization">
-            <xsl:value-of select="foaf:Organization/foaf:name" />
+            <xsl:value-of select="foaf:Organization/foaf:name"/>
         </xsl:if>
         <xsl:if test="foaf:Agent">
-            <xsl:value-of select="foaf:Agent/foaf:name" />
+            <xsl:value-of select="foaf:Agent/foaf:name"/>
         </xsl:if>
     </xsl:template>
-   
     <xsl:template match="dct:spatial">
         <xsl:element name="mmd:geographic_extent">
-	    <xsl:apply-templates select="dct:Location"/>
+            <xsl:apply-templates select="dct:Location"/>
         </xsl:element>
     </xsl:template>
-
     <xsl:template match="dct:Location">
-	<xsl:if test="dcat:bbox and contains(dcat:bbox/@rdf:datatype,'wkt') and contains(dcat:bbox,'POLYGON')">
+        <!--It could be directly dcat:bbox-->
+        <xsl:if test="dcat:bbox and contains(dcat:bbox/@rdf:datatype,'wkt') and contains(dcat:bbox,'POLYGON')">
+            <xsl:variable name="wkt">
+                <!--expect POLYGON((-31.285 70.075,34.099 70.075,34.099 27.642,-31.285 27.642,-31.285 70.075))-->
+                <xsl:value-of select="substring-before(substring-after(dcat:bbox, '(('), '))')"/>
+            </xsl:variable>
             <xsl:element name="mmd:rectangle">
-                <!--xsl:attribute name="srsName">
-                    <xsl:value-of select="'EPSG:4326'" />
-                </xsl:attribute-->
-		<xsl:variable name="wkt" >
-	      	    <!--expect POLYGON((-31.285 70.075,34.099 70.075,34.099 27.642,-31.285 27.642,-31.285 70.075))-->
-                    <xsl:value-of select="substring-before(substring-after(dcat:bbox, '(('), '))')" />
-                </xsl:variable>
+                <xsl:attribute name="srsName">
+                    <xsl:text>EPSG:4326</xsl:text>
+                </xsl:attribute>
                 <xsl:call-template name="wktseparation">
-                    <xsl:with-param name="boxcoordinates" select="$wkt" />
+                    <xsl:with-param name="boxcoordinates" select="$wkt"/>
                 </xsl:call-template>
             </xsl:element>
         </xsl:if>
-	<!--xsl:if test="locn:geometry and contains(locn:geometry/@rdf:datatype,'wkt') and contains(locn:geometry,'POLYGON')">
-            <xsl:element name="mmd:polygon">
-                <xsl:element name="gml:Polygon">
-                    <xsl:attribute name="id">polygon</xsl:attribute>
-	            <xsl:variable name="polygon" >
-                        <xsl:value-of select="substring-before(substring-after(locn:geometry, '(('), '))')" />
-                    </xsl:variable>
-                    <xsl:call-template name="polygonseparation">
-                        <xsl:with-param name="polcoordinates" select="$polygon" />
+        <!--It could also be POLYGON with 4 corners-->
+        <xsl:if test="locn:geometry and contains(locn:geometry/@rdf:datatype,'wkt') and contains(locn:geometry,'POLYGON')">
+            <xsl:variable name="wkt">
+                <xsl:value-of select="substring-before(substring-after(locn:geometry, '(('), '))')"/>
+            </xsl:variable>
+            <xsl:variable name="commaCount" select="string-length($wkt) - string-length(translate($wkt, ',', ''))"/>
+            <xsl:if test="$commaCount = 4">
+                <xsl:element name="mmd:rectangle">
+                    <xsl:attribute name="srsName">
+                        <xsl:text>EPSG:4326</xsl:text>
+                    </xsl:attribute>
+                    <xsl:call-template name="wktseparation">
+                        <xsl:with-param name="boxcoordinates" select="$wkt"/>
                     </xsl:call-template>
                 </xsl:element>
+            </xsl:if>
+        </xsl:if>
+        <xsl:if test="locn:geometry and contains(locn:geometry/@rdf:datatype,'wkt') and contains(locn:geometry,'POINT')">
+            <!-->POINT (126.4595 72.3680) is E(W)/N(S)-->
+            <xsl:variable name="pointvalues">
+                <xsl:value-of select="substring-after(substring-before(., ')'), '(')"/>
+            </xsl:variable>
+            <xsl:element name="mmd:rectangle">
+                <xsl:attribute name="srsName">
+                    <xsl:text>EPSG:4326</xsl:text>
+                </xsl:attribute>
+                <xsl:element name="mmd:north">
+                    <xsl:value-of select="substring-after($pointvalues,' ')"/>
+                </xsl:element>
+                <xsl:element name="mmd:south">
+                    <xsl:value-of select="substring-after($pointvalues,' ')"/>
+                </xsl:element>
+                <xsl:element name="mmd:east">
+                    <xsl:value-of select="substring-before($pointvalues,' ')"/>
+                </xsl:element>
+                <xsl:element name="mmd:west">
+                    <xsl:value-of select="substring-before($pointvalues,' ')"/>
+                </xsl:element>
             </xsl:element>
-        </xsl:if-->
+        </xsl:if>
     </xsl:template>
-    
     <xsl:template name="wktseparation">
-	
         <xsl:param name="boxcoordinates"/>
-	<xsl:variable name="long1">
-		<xsl:value-of select="number(substring-before(substring-before($boxcoordinates, ','), ' '))"/>
-	</xsl:variable>
-	<xsl:variable name="left1">
-		<xsl:value-of select="substring-after($boxcoordinates, ',')"/>
-	</xsl:variable>
-	<xsl:variable name="long2">
-		<xsl:value-of select="number(substring-before(substring-before($left1, ','), ' '))"/>
-	</xsl:variable>
-	<xsl:variable name="left2">
-		<xsl:value-of select="substring-after($left1, ',')"/>
-	</xsl:variable>
-	<xsl:variable name="long3">
-		<xsl:value-of select="number(substring-before(substring-before($left2, ','), ' '))"/>
-	</xsl:variable>
-	<xsl:variable name="left3">
-		<xsl:value-of select="substring-after($left2, ',')"/>
-	</xsl:variable>
-	<xsl:variable name="long4">
-		<xsl:value-of select="number(substring-before(substring-before($left3, ','), ' '))"/>
-	</xsl:variable>
-          
+        <xsl:variable name="long1">
+            <xsl:value-of select="number(substring-before(substring-before($boxcoordinates, ','), ' '))"/>
+        </xsl:variable>
+        <xsl:variable name="left1">
+            <xsl:value-of select="substring-after($boxcoordinates, ',')"/>
+        </xsl:variable>
+        <xsl:variable name="long2">
+            <xsl:value-of select="number(substring-before(substring-before(normalize-space($left1), ','), ' '))"/>
+        </xsl:variable>
+        <xsl:variable name="left2">
+            <xsl:value-of select="substring-after($left1, ',')"/>
+        </xsl:variable>
+        <xsl:variable name="long3">
+            <xsl:value-of select="number(substring-before(substring-before(normalize-space($left2), ','), ' '))"/>
+        </xsl:variable>
+        <xsl:variable name="left3">
+            <xsl:value-of select="substring-after($left2, ',')"/>
+        </xsl:variable>
+        <xsl:variable name="long4">
+            <xsl:value-of select="number(substring-before(substring-before(normalize-space($left3), ','), ' '))"/>
+        </xsl:variable>
+        <xsl:variable name="maxlong12">
+            <xsl:choose>
+                <xsl:when test="$long1 &gt; $long2">
+                    <xsl:value-of select="$long1"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$long2"/>
+                </xsl:otherwise>
+            </xsl:choose>
+        </xsl:variable>
+        <xsl:variable name="maxlong34">
+            <xsl:choose>
+                <xsl:when test="$long3 &gt; $long4">
+                    <xsl:value-of select="$long3"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$long4"/>
+                </xsl:otherwise>
+            </xsl:choose>
+        </xsl:variable>
         <xsl:variable name="maxlong">
-	    <xsl:choose>
-	        <xsl:when test="($long1 > $long3)">
-	    	    <xsl:value-of select="$long1"/>
-	        </xsl:when>
-	        <xsl:otherwise>
-	    	    <xsl:value-of select="$long3"/>
-	        </xsl:otherwise>
-	    </xsl:choose>
+            <xsl:choose>
+                <xsl:when test="$maxlong12 &gt; $maxlong34">
+                    <xsl:value-of select="$maxlong12"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$maxlong34"/>
+                </xsl:otherwise>
+            </xsl:choose>
+        </xsl:variable>
+        <xsl:variable name="minlong12">
+            <xsl:choose>
+                <xsl:when test="$long1 &gt; $long2">
+                    <xsl:value-of select="$long2"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$long1"/>
+                </xsl:otherwise>
+            </xsl:choose>
+        </xsl:variable>
+        <xsl:variable name="minlong34">
+            <xsl:choose>
+                <xsl:when test="$long3 &gt; $long4">
+                    <xsl:value-of select="$long4"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$long3"/>
+                </xsl:otherwise>
+            </xsl:choose>
         </xsl:variable>
-
         <xsl:variable name="minlong">
-	    <xsl:choose>
-	        <xsl:when test="($long1 > $long3)">
-	     	    <xsl:value-of select="$long3"/>
-	        </xsl:when>
-		<xsl:otherwise>
-		    <xsl:value-of select="$long1"/>
-		</xsl:otherwise>
-	    </xsl:choose>
+            <xsl:choose>
+                <xsl:when test="$minlong12 &gt; $minlong34">
+                    <xsl:value-of select="$maxlong34"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$minlong12"/>
+                </xsl:otherwise>
+            </xsl:choose>
+        </xsl:variable>
+        <!---20.7968 74.3606, -20.7968 74.4075, -20.8987 74.4075, -20.8987 74.3606, -20.7968 74.3606-->
+        <xsl:variable name="lat1">
+            <xsl:value-of select="number(substring-after(substring-before($boxcoordinates, ','), ' '))"/>
+        </xsl:variable>
+        <xsl:variable name="left1a">
+            <xsl:value-of select="substring-after($boxcoordinates, ',')"/>
+        </xsl:variable>
+        <xsl:variable name="lat2">
+            <xsl:value-of select="number(substring-after(substring-before(normalize-space($left1a), ','), ' '))"/>
+        </xsl:variable>
+        <xsl:variable name="left2a">
+            <xsl:value-of select="substring-after($left1a, ', ')"/>
+        </xsl:variable>
+        <xsl:variable name="lat3">
+            <xsl:value-of select="number(substring-after(substring-before(normalize-space($left2a), ','), ' '))"/>
+        </xsl:variable>
+        <xsl:variable name="left3a">
+            <xsl:value-of select="substring-after($left2a, ', ')"/>
+        </xsl:variable>
+        <xsl:variable name="lat4">
+            <xsl:value-of select="number(substring-after(substring-before(normalize-space($left3a), ','), ' '))"/>
+        </xsl:variable>
+        <xsl:variable name="maxlat12">
+            <xsl:choose>
+                <xsl:when test="$lat1 &gt; $lat2">
+                    <xsl:value-of select="$lat1"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$lat2"/>
+                </xsl:otherwise>
+            </xsl:choose>
+        </xsl:variable>
+        <xsl:variable name="maxlat34">
+            <xsl:choose>
+                <xsl:when test="$lat3 &gt; $lat4">
+                    <xsl:value-of select="$lat3"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$lat4"/>
+                </xsl:otherwise>
+            </xsl:choose>
         </xsl:variable>
-
-	<xsl:variable name="lat1">
-		<xsl:value-of select="number(substring-after(substring-before($boxcoordinates, ','), ' '))"/>
-	</xsl:variable>
-	<xsl:variable name="left1a">
-		<xsl:value-of select="substring-after($boxcoordinates, ',')"/>
-	</xsl:variable>
-	<xsl:variable name="lat2">
-		<xsl:value-of select="number(substring-after(substring-before($left1a, ','), ' '))"/>
-	</xsl:variable>
-	<xsl:variable name="left2a">
-		<xsl:value-of select="substring-after($left1a, ',')"/>
-	</xsl:variable>
-	<xsl:variable name="lat3">
-		<xsl:value-of select="number(substring-after(substring-before($left2a, ','), ' '))"/>
-	</xsl:variable>
-	<xsl:variable name="left3a">
-		<xsl:value-of select="substring-after($left2a, ',')"/>
-	</xsl:variable>
-	<xsl:variable name="lat4">
-		<xsl:value-of select="number(substring-after(substring-before($left3a, ','), ' '))"/>
-	</xsl:variable>
-          
         <xsl:variable name="maxlat">
-	    <xsl:choose>
-	        <xsl:when test="($lat1 > $lat3)">
-	    	    <xsl:value-of select="$lat1"/>
-	        </xsl:when>
-	        <xsl:otherwise>
-	    	    <xsl:value-of select="$lat3"/>
-	        </xsl:otherwise>
-	    </xsl:choose>
+            <xsl:choose>
+                <xsl:when test="$maxlat12 &gt; $maxlat34">
+                    <xsl:value-of select="$maxlat12"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$maxlat34"/>
+                </xsl:otherwise>
+            </xsl:choose>
+        </xsl:variable>
+        <xsl:variable name="minlat12">
+            <xsl:choose>
+                <xsl:when test="$lat1 &gt; $lat2">
+                    <xsl:value-of select="$lat2"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$lat1"/>
+                </xsl:otherwise>
+            </xsl:choose>
+        </xsl:variable>
+        <xsl:variable name="minlat34">
+            <xsl:choose>
+                <xsl:when test="$lat3 &gt; $lat4">
+                    <xsl:value-of select="$lat4"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$lat3"/>
+                </xsl:otherwise>
+            </xsl:choose>
         </xsl:variable>
-
         <xsl:variable name="minlat">
-	    <xsl:choose>
-	        <xsl:when test="($lat1 > $lat3)">
-	     	    <xsl:value-of select="$lat3"/>
-	        </xsl:when>
-		<xsl:otherwise>
-		    <xsl:value-of select="$lat1"/>
-		</xsl:otherwise>
-	    </xsl:choose>
+            <xsl:choose>
+                <xsl:when test="$minlat12 &gt; $minlat34">
+                    <xsl:value-of select="$maxlat34"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="$minlat12"/>
+                </xsl:otherwise>
+            </xsl:choose>
         </xsl:variable>
-
-        <xsl:element name="mmd:south">
-          <xsl:value-of select="$minlat" />
-        </xsl:element>
         <xsl:element name="mmd:north">
-          <xsl:value-of select="$maxlat" />
+            <xsl:value-of select="$maxlat"/>
         </xsl:element>
-        <xsl:element name="mmd:west">
-          <xsl:value-of select="$minlong" />
+        <xsl:element name="mmd:south">
+            <xsl:value-of select="$minlat"/>
         </xsl:element>
         <xsl:element name="mmd:east">
-          <xsl:value-of select="$maxlong" />
+            <xsl:value-of select="$maxlong"/>
+        </xsl:element>
+        <xsl:element name="mmd:west">
+            <xsl:value-of select="$minlong"/>
         </xsl:element>
     </xsl:template>
-
     <!--to be fixed-->
     <xsl:template name="polygonseparation">
     </xsl:template>
-
     <xsl:template match="dct:temporal">
         <xsl:element name="mmd:temporal_extent">
             <xsl:element name="mmd:start_date">
-                <xsl:value-of select="dct:PeriodOfTime/dcat:startDate"/>
-            </xsl:element>
-            <xsl:element name="mmd:end_date">
-                <xsl:value-of select="dct:PeriodOfTime/dcat:endDate"/>
+                <xsl:choose>
+                    <xsl:when test="contains(dct:PeriodOfTime/dcat:startDate, 'T')">
+                        <xsl:value-of select="dct:PeriodOfTime/dcat:startDate"/>
+                    </xsl:when>
+                    <xsl:otherwise>
+                        <xsl:value-of select="concat(dct:PeriodOfTime/dcat:startDate,'T12:00:00Z')"/>
+                    </xsl:otherwise>
+                </xsl:choose>
             </xsl:element>
+                <xsl:if test="dct:PeriodOfTime/dcat:endDate !='' and dct:PeriodOfTime/dcat:endDate !='ongoing'">
+                    <xsl:element name="mmd:end_date">
+                        <xsl:choose>
+                            <xsl:when test="contains(dct:PeriodOfTime/dcat:endDate, 'T')">
+                                <xsl:value-of select="dct:PeriodOfTime/dcat:endDate"/>
+                            </xsl:when>
+                            <xsl:otherwise>
+                                <xsl:value-of select="concat(dct:PeriodOfTime/dcat:endDate,'T12:00:00Z')"/>
+                            </xsl:otherwise>
+                        </xsl:choose>
+                    </xsl:element>
+            </xsl:if>
         </xsl:element>
     </xsl:template>
-
     <xsl:template match="dct:identifier">
         <xsl:element name="mmd:metadata_identifier">
-            <xsl:value-of select="." />
+            <xsl:value-of select="."/>
         </xsl:element>
     </xsl:template>
-    
+    <xsl:template match="schema:license">
+        <xsl:variable name="dcatuse">
+            <xsl:value-of select="."/>
+        </xsl:variable>
+        <xsl:if test="not(normalize-space($dcatuse)='')">
+            <xsl:for-each select="$isoLUD">
+                <xsl:choose>
+                    <xsl:when test="key('usec', $dcatuse)">
+                        <xsl:variable name="prefuseid" select="key('usec', $dcatuse)/skos:prefLabel"/>
+                        <xsl:variable name="prefuseref" select="key('usec', $dcatuse)/skos:exactMatch/@rdf:resource[contains(.,'spdx')]"/>
+                        <xsl:element name="mmd:use_constraint">
+                            <xsl:element name="mmd:identifier">
+                                <xsl:value-of select="$prefuseid"/>
+                            </xsl:element>
+                            <xsl:element name="mmd:resource">
+                                <xsl:value-of select="$prefuseref"/>
+                            </xsl:element>
+                        </xsl:element>
+                    </xsl:when>
+                    <xsl:when test="key('useca', $dcatuse)">
+                        <xsl:variable name="prefuseid" select="key('useca', $dcatuse)/skos:prefLabel"/>
+                        <xsl:variable name="prefuseref" select="key('useca', $dcatuse)/skos:exactMatch/@rdf:resource[contains(.,'spdx')]"/>
+                        <xsl:element name="mmd:use_constraint">
+                            <xsl:element name="mmd:identifier">
+                                <xsl:value-of select="$prefuseid"/>
+                            </xsl:element>
+                            <xsl:element name="mmd:resource">
+                                <xsl:value-of select="$prefuseref"/>
+                            </xsl:element>
+                        </xsl:element>
+                    </xsl:when>
+                    <xsl:when test="key('usecexact', substring-after($dcatuse, '://'))">
+                        <xsl:variable name="prefuseid" select="key('usecexact', substring-after($dcatuse, '://'))/../skos:prefLabel"/>
+                        <xsl:variable name="prefuseref" select="key('usecexact', substring-after($dcatuse, '://'))/../skos:exactMatch/@rdf:resource[contains(.,'spdx')]"/>
+                        <xsl:element name="mmd:use_constraint">
+                            <xsl:element name="mmd:identifier">
+                                <xsl:value-of select="$prefuseid"/>
+                            </xsl:element>
+                            <xsl:element name="mmd:resource">
+                                <xsl:value-of select="$prefuseref"/>
+                            </xsl:element>
+                        </xsl:element>
+                    </xsl:when>
+                    <xsl:otherwise>
+                        <xsl:element name="mmd:use_constraint">
+                            <xsl:element name="mmd:license_text">
+                                <xsl:value-of select="$dcatuse"/>
+                            </xsl:element>
+                        </xsl:element>
+                    </xsl:otherwise>
+                </xsl:choose>
+            </xsl:for-each>
+        </xsl:if>
+    </xsl:template>
     <xsl:template match="dct:accessRights">
-	<!--This is most likely a resource URL/controlled vocabulary which should be mapped public, restricted, non-public-->
+        <!--This is most likely a resource URL/controlled vocabulary which should be mapped public, restricted, non-public-->
         <xsl:element name="mmd:access_constraint">
-	    <xsl:choose>
-	        <xsl:when test="dct:RightsStatement">
-	            <xsl:value-of select="dct:RightsStatement" />
-	        </xsl:when>
-	        <xsl:otherwise>
-	            <xsl:value-of select="." />
-	        </xsl:otherwise>
-	    </xsl:choose>
+            <xsl:choose>
+                <xsl:when test="dct:RightsStatement">
+                    <xsl:value-of select="dct:RightsStatement"/>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:value-of select="."/>
+                </xsl:otherwise>
+            </xsl:choose>
         </xsl:element>
     </xsl:template>
-
     <xsl:template match="dcat:landingPage">
         <xsl:element name="mmd:related_information">
-	    <!--This can probably have a different representation-->
+            <!--This can probably have a different representation-->
             <xsl:element name="mmd:type">Dataset landing page</xsl:element>
-	    <xsl:choose>
-	        <xsl:when test="foaf:Document">
+            <xsl:choose>
+                <xsl:when test="foaf:Document">
                     <xsl:element name="mmd:resource">
-	                <xsl:value-of select="foaf:Document/@rdf:about" />
+                        <xsl:value-of select="foaf:Document/@rdf:about"/>
                     </xsl:element>
                     <xsl:element name="mmd:description">
-                        <xsl:value-of select="foaf:Document/dct:description" />
+                        <xsl:value-of select="foaf:Document/dct:description"/>
                     </xsl:element>
-	        </xsl:when>
-	        <xsl:otherwise>
+                </xsl:when>
+                <xsl:otherwise>
                     <xsl:element name="mmd:resource">
-	                <xsl:value-of select="." />
+                        <xsl:value-of select="."/>
                     </xsl:element>
-	        </xsl:otherwise>
-	    </xsl:choose>
+                </xsl:otherwise>
+            </xsl:choose>
         </xsl:element>
     </xsl:template>
-
     <xsl:template match="foaf:page">
-	<!--This  property  refers  to  a  page  or document about this Dataset. We can't discriminate the type-->
+        <!--This  property  refers  to  a  page  or document about this Dataset. We can't discriminate the type-->
         <xsl:element name="mmd:related_information">
             <xsl:element name="mmd:type">Other documentation</xsl:element>
-	    <xsl:choose>
-	        <xsl:when test="foaf:Document">
+            <xsl:choose>
+                <xsl:when test="foaf:Document">
                     <xsl:element name="mmd:resource">
-	                <xsl:value-of select="foaf:Document/@rdf:about" />
+                        <xsl:value-of select="foaf:Document/@rdf:about"/>
                     </xsl:element>
                     <xsl:element name="mmd:description">
-                        <xsl:value-of select="foaf:Document/dct:description" />
+                        <xsl:value-of select="foaf:Document/dct:description"/>
                     </xsl:element>
-	        </xsl:when>
-	        <xsl:otherwise>
+                </xsl:when>
+                <xsl:otherwise>
                     <xsl:element name="mmd:resource">
-	                <xsl:value-of select="@rdf:resource" />
+                        <xsl:value-of select="@rdf:resource"/>
                     </xsl:element>
-	        </xsl:otherwise>
-	    </xsl:choose>
+                </xsl:otherwise>
+            </xsl:choose>
         </xsl:element>
     </xsl:template>
-
     <xsl:template match="dct:language">
-	    <!--In dcat this element is NOT unique as in mmd-->
+        <!--In dcat this element is NOT unique as in mmd-->
         <xsl:element name="mmd:dataset_language">
-	    <!--probably dct:LinguisticSystem is used instead. It should be a resource type.-->
-            <xsl:value-of select="." />
+            <!--probably dct:LinguisticSystem is used instead. It should be a resource type.-->
+            <xsl:value-of select="."/>
         </xsl:element>
     </xsl:template>
-
 </xsl:stylesheet>

From e75b198304a2d927cee46cf6fd42d1993d0cdfc6 Mon Sep 17 00:00:00 2001
From: Lara Ferrighi <laraf@met.no>
Date: Tue, 17 Mar 2026 13:06:24 +0100
Subject: [PATCH 2/2] update dcat-to-mmd

---
 xslt/dcat-to-mmd.xsl | 197 +++++++++++++++++++++++++++++++++++++------
 1 file changed, 171 insertions(+), 26 deletions(-)

diff --git a/xslt/dcat-to-mmd.xsl b/xslt/dcat-to-mmd.xsl
index d06117e..bbc0538 100644
--- a/xslt/dcat-to-mmd.xsl
+++ b/xslt/dcat-to-mmd.xsl
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-Draft implementation of dcat to mmd mapping
+Draft implementation of dcat to mmd mapping.
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
     xmlns:mmd="http://www.met.no/schema/mmd"
@@ -20,6 +20,7 @@ Draft implementation of dcat to mmd mapping
     xmlns:locn="http://www.w3.org/ns/locn#"
     xmlns:adms="http://www.w3.org/ns/adms#"
     xmlns:dif="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/"
+    xmlns:mapping="http://www.met.no/schema/mmd/dcat2mmd"
     version="1.0">
     <xsl:output method="xml" encoding="UTF-8" indent="yes"/>
     <xsl:variable name="isoLUD" select="document('../thesauri/mmd-vocabulary.xml')"/>
@@ -34,9 +35,31 @@ Draft implementation of dcat to mmd mapping
     <xsl:template match="dcat:Dataset">
         <xsl:apply-templates select="dct:identifier"/>
         <xsl:apply-templates select="dct:title"/>
-        <xsl:apply-templates select="dct:description"/>
+        <!--abstract sometimes is missing-->
+        <xsl:choose>
+            <xsl:when test="dct:description">
+                <xsl:element name="mmd:abstract">
+                    <xsl:attribute name="xml:lang">en</xsl:attribute>
+                    <xsl:value-of select="dct:description"/>
+                </xsl:element>
+            </xsl:when>
+            <xsl:otherwise>
+                <xsl:element name="mmd:abstract">
+                    <xsl:attribute name="xml:lang">en</xsl:attribute>
+                    <xsl:value-of select="dct:title"/>
+                </xsl:element>
+            </xsl:otherwise>
+        </xsl:choose>
         <xsl:element name="mmd:metadata_status">
-            <xsl:text>Active</xsl:text>
+            <!--ad-hoc filtering to Inactive for records that are harvested through other means. This is a workaround until a better way is found. -->
+            <xsl:choose>
+                <xsl:when test="contains(dcat:landingPage/foaf:Document/@rdf:about, 'iadc.cnr.it') or contains(dcat:landingPage/foaf:Document/@rdf:about, 'PANGAEA') or contains(dcat:landingPage/foaf:Document/@rdf:about, 'data.g-e-m.dk')">
+                    <xsl:text>Inactive</xsl:text>
+                </xsl:when>
+                <xsl:otherwise>
+                    <xsl:text>Active</xsl:text>
+                </xsl:otherwise>
+            </xsl:choose>
         </xsl:element>
         <xsl:element name="mmd:dataset_production_status">
             <xsl:text>Not available</xsl:text>
@@ -44,21 +67,32 @@ Draft implementation of dcat to mmd mapping
         <xsl:element name="mmd:collection">
             <xsl:text>ADC</xsl:text>
         </xsl:element>
+        <xsl:call-template name="collection">
+            <xsl:with-param name="obsfac" select="dcat:theme" />
+        </xsl:call-template>
         <xsl:element name="mmd:last_metadata_update">
             <xsl:if test="dct:issued">
                 <xsl:element name="mmd:update">
                     <xsl:element name="mmd:datetime">
-                        <xsl:value-of select="dct:issued"/>
+                        <!--xsl:value-of select="dct:issued"/-->
+                        <xsl:call-template name="datetime">
+                            <xsl:with-param name="datetime" select="dct:issued" />
+                        </xsl:call-template>
                     </xsl:element>
                     <xsl:element name="mmd:type">
                         <xsl:text>Created</xsl:text>
                     </xsl:element>
+                    <xsl:element name="mmd:note">
+                        <xsl:text>Information caputured from DCAT record</xsl:text>
+                    </xsl:element>
                 </xsl:element>
             </xsl:if>
             <xsl:if test="dct:modified">
                 <xsl:element name="mmd:update">
                     <xsl:element name="mmd:datetime">
-                        <xsl:value-of select="dct:modified"/>
+                        <xsl:call-template name="datetime">
+                            <xsl:with-param name="datetime" select="dct:modified" />
+                        </xsl:call-template>
                     </xsl:element>
                     <xsl:element name="mmd:type">
                         <xsl:text>Major modification</xsl:text>
@@ -69,7 +103,7 @@ Draft implementation of dcat to mmd mapping
                 </xsl:element>
             </xsl:if>
         </xsl:element>
-        <xsl:apply-templates select="dct:temporal"/>
+        <xsl:apply-templates select="dct:temporal[1]"/>
         <xsl:element name="mmd:iso_topic_category">
             <xsl:text>Not available</xsl:text>
         </xsl:element>
@@ -85,6 +119,9 @@ Draft implementation of dcat to mmd mapping
                     <xsl:value-of select="schema:PropertyValue/schema:name"/>
                 </xsl:element>
             </xsl:for-each>
+            <xsl:call-template name="stationnames">
+                <xsl:with-param name="obsfac" select="dcat:theme" />
+            </xsl:call-template>
         </xsl:element>
         <xsl:apply-templates select="dcat:contactPoint"/>
         <!--create also investigator, unique in dcat-->
@@ -104,6 +141,7 @@ Draft implementation of dcat to mmd mapping
                 </xsl:element>
             </xsl:element>
         </xsl:if>
+		<xsl:apply-templates select="dct:publisher[1]" />
         <xsl:for-each select="dcat:distribution">
             <xsl:apply-templates select="dcat:Distribution"/>
         </xsl:for-each>
@@ -122,22 +160,21 @@ Draft implementation of dcat to mmd mapping
         <xsl:apply-templates select="schema:license"/>
         <xsl:apply-templates select="dcat:landingPage"/>
         <xsl:apply-templates select="foaf:page"/>
+        <xsl:call-template name="obsfacility">
+            <xsl:with-param name="obsfac" select="dcat:theme" />
+        </xsl:call-template>
+        <xsl:apply-templates select="schema:citation"/>
         <xsl:element name="mmd:metadata_source">
             <xsl:text>External-Harvest</xsl:text>
         </xsl:element>
     </xsl:template>
+
     <xsl:template match="dct:title">
         <xsl:element name="mmd:title">
             <xsl:attribute name="xml:lang">en</xsl:attribute>
             <xsl:value-of select="."/>
         </xsl:element>
     </xsl:template>
-    <xsl:template match="dct:description">
-        <xsl:element name="mmd:abstract">
-            <xsl:attribute name="xml:lang">en</xsl:attribute>
-            <xsl:value-of select="."/>
-        </xsl:element>
-    </xsl:template>
     <xsl:template match="dcat:contactPoint">
         <xsl:if test="vcard:Organization">
             <xsl:if test="not(contains(vcard:Organization/vcard:fn, 'author'))">
@@ -193,12 +230,34 @@ Draft implementation of dcat to mmd mapping
     </xsl:template>
     <xsl:template match="dct:publisher">
         <!--This can be in different format, as resource for example-->
-        <xsl:if test="foaf:Organization">
-            <xsl:value-of select="foaf:Organization/foaf:name"/>
-        </xsl:if>
-        <xsl:if test="foaf:Agent">
-            <xsl:value-of select="foaf:Agent/foaf:name"/>
-        </xsl:if>
+        <xsl:element name="mmd:data_center">
+            <xsl:element name="mmd:data_center_name">
+                <xsl:element name="mmd:short_name">
+                    <xsl:if test="foaf:Organization">
+                        <xsl:value-of select="foaf:Organization/foaf:name"/>
+                    </xsl:if>
+                    <xsl:if test="foaf:Agent">
+                        <xsl:value-of select="foaf:Agent/foaf:name"/>
+                    </xsl:if>
+                </xsl:element>
+                <xsl:element name="mmd:long_name">
+                    <xsl:if test="foaf:Organization">
+                        <xsl:value-of select="foaf:Organization/foaf:name"/>
+                    </xsl:if>
+                    <xsl:if test="foaf:Agent">
+                        <xsl:value-of select="foaf:Agent/foaf:name"/>
+                    </xsl:if>
+                </xsl:element>
+            </xsl:element>
+            <xsl:element name="mmd:data_center_url">
+                <xsl:if test="foaf:Organization">
+                    <xsl:value-of select="foaf:Organization/foaf:name"/>
+                </xsl:if>
+                <xsl:if test="foaf:Agent">
+                    <xsl:value-of select="foaf:Agent/foaf:homepage/@rdf:resource"/>
+                </xsl:if>
+            </xsl:element>
+        </xsl:element>
     </xsl:template>
     <xsl:template match="dct:spatial">
         <xsl:element name="mmd:geographic_extent">
@@ -227,7 +286,8 @@ Draft implementation of dcat to mmd mapping
                 <xsl:value-of select="substring-before(substring-after(locn:geometry, '(('), '))')"/>
             </xsl:variable>
             <xsl:variable name="commaCount" select="string-length($wkt) - string-length(translate($wkt, ',', ''))"/>
-            <xsl:if test="$commaCount = 4">
+            <!--sometimes a POINT is represented as degerate POLYGON: POLYGON ((-53.5100 69.2510, -53.5100 69.2510, -53.5100 69.2510, -53.5100 69.2510))-->
+            <xsl:if test="$commaCount = 4 or $commaCount = 3">
                 <xsl:element name="mmd:rectangle">
                     <xsl:attribute name="srsName">
                         <xsl:text>EPSG:4326</xsl:text>
@@ -297,7 +357,7 @@ Draft implementation of dcat to mmd mapping
         </xsl:variable>
         <xsl:variable name="maxlong34">
             <xsl:choose>
-                <xsl:when test="$long3 &gt; $long4">
+                <xsl:when test="$long3 &gt; $long4 or $long4 ='NaN'">
                     <xsl:value-of select="$long3"/>
                 </xsl:when>
                 <xsl:otherwise>
@@ -327,7 +387,7 @@ Draft implementation of dcat to mmd mapping
         </xsl:variable>
         <xsl:variable name="minlong34">
             <xsl:choose>
-                <xsl:when test="$long3 &gt; $long4">
+                <xsl:when test="$long3 &gt; $long4 or $long4 ='NaN'">
                     <xsl:value-of select="$long4"/>
                 </xsl:when>
                 <xsl:otherwise>
@@ -379,7 +439,7 @@ Draft implementation of dcat to mmd mapping
         </xsl:variable>
         <xsl:variable name="maxlat34">
             <xsl:choose>
-                <xsl:when test="$lat3 &gt; $lat4">
+                <xsl:when test="$lat3 &gt; $lat4 or $lat4 = 'NaN'">
                     <xsl:value-of select="$lat3"/>
                 </xsl:when>
                 <xsl:otherwise>
@@ -409,7 +469,7 @@ Draft implementation of dcat to mmd mapping
         </xsl:variable>
         <xsl:variable name="minlat34">
             <xsl:choose>
-                <xsl:when test="$lat3 &gt; $lat4">
+                <xsl:when test="$lat3 &gt; $lat4 or $lat4 = 'NaN'">
                     <xsl:value-of select="$lat4"/>
                 </xsl:when>
                 <xsl:otherwise>
@@ -440,9 +500,6 @@ Draft implementation of dcat to mmd mapping
             <xsl:value-of select="$minlong"/>
         </xsl:element>
     </xsl:template>
-    <!--to be fixed-->
-    <xsl:template name="polygonseparation">
-    </xsl:template>
     <xsl:template match="dct:temporal">
         <xsl:element name="mmd:temporal_extent">
             <xsl:element name="mmd:start_date">
@@ -590,4 +647,92 @@ Draft implementation of dcat to mmd mapping
             <xsl:value-of select="."/>
         </xsl:element>
     </xsl:template>
+    <xsl:template name="datetime">
+        <xsl:param name="datetime"/>
+        <xsl:choose>
+            <xsl:when test="contains($datetime, 'T')">
+                <xsl:choose>
+                    <xsl:when test="contains($datetime, 'Z')">
+                        <xsl:value-of select="$datetime"/>
+                    </xsl:when>
+                    <xsl:otherwise>
+                        <xsl:value-of select="concat($datetime,'Z')"/>
+                    </xsl:otherwise>
+                </xsl:choose>
+            </xsl:when>
+            <xsl:otherwise>
+                <xsl:value-of select="concat($datetime,'T12:00:00Z')"/>
+            </xsl:otherwise>
+        </xsl:choose>
+    </xsl:template>
+    <xsl:template name="obsfacility">
+        <xsl:param name="obsfac" select="." />
+        <xsl:variable name="mmd_obsfac_name" select="document('')/*/mapping:station[@dcat=$obsfac]/@mmd" />
+        <xsl:variable name="mmd_obsfac_resource" select="document('')/*/mapping:station[@dcat=$obsfac]/@resource" />
+        <xsl:if test="$mmd_obsfac_resource !=''">
+            <xsl:element name="mmd:related_information">
+                <xsl:element name="mmd:type">
+                    <xsl:text>Observation facility</xsl:text>
+                </xsl:element>
+                <xsl:element name="mmd:description">
+                    <xsl:value-of select="$mmd_obsfac_name" />
+                </xsl:element>
+                <xsl:element name="mmd:resource">
+                    <xsl:value-of select="$mmd_obsfac_resource" />
+                </xsl:element>
+            </xsl:element>
+        </xsl:if>
+    </xsl:template>
+    <xsl:template name="collection">
+        <xsl:param name="obsfac" select="." />
+        <xsl:variable name="polarin_collection" select="document('')/*/mapping:station[@dcat=$obsfac]/@polarin" />
+        <xsl:if test="$polarin_collection ='True'">
+            <xsl:element name="mmd:collection">
+                <xsl:text>POLARIN</xsl:text>
+            </xsl:element>
+        </xsl:if>
+    </xsl:template>
+    <xsl:template name="stationnames">
+        <xsl:param name="obsfac" select="." />
+        <xsl:variable name="mmd_obsfac_name" select="document('')/*/mapping:station[@dcat=$obsfac]/@mmd" />
+        <xsl:element name="mmd:keyword">
+            <xsl:value-of select="$mmd_obsfac_name" />
+        </xsl:element>
+    </xsl:template>
+    <xsl:template match="schema:citation">
+        <xsl:if test="starts-with(., 'http://doi') or starts-with(., 'https://doi')">
+            <xsl:element name="mmd:dataset_citation">
+                <xsl:element name="mmd:doi">
+                    <xsl:value-of select="."/>
+                </xsl:element>
+            </xsl:element>
+        </xsl:if>
+    </xsl:template>
+
+    <!--dedicated interact mapping-->
+    <mapping:station dcat="abisko-scientific-resarch-station" mmd="Abisko Scientific Research Station" polarin="True" resource="https://www.polar.se/en/research-support/abisko-scientific-research-station/"/>
+    <mapping:station dcat="arctic-station" mmd="Arctic Station" polarin="True" resource="https://arktiskstation.ku.dk/"/>
+    <mapping:station dcat="cnr-arctic-station-dirigibile-italia" mmd='CNR Arctic Station "Dirigibile Italia"' polarin="True" resource="https://www.isp.cnr.it/en/infrastructures/research-stations/dirigibile-italia"/>
+    <mapping:station dcat="zackenberg-research-station" mmd="Zackenberg Research Station" polarin="True" resource="https://zackenberg.dk/"/>
+    <mapping:station dcat="kevo-subarctic-research-station" mmd="Kevo Subarctic Research Station" polarin="True" resource="https://sites.utu.fi/kevo/en/"/>
+    <mapping:station dcat="oulanka-research-station" mmd="Oulanka Research Station" polarin="True" resource="https://www.oulu.fi/en/research/research-infrastructures/oulanka-research-station"/>
+    <mapping:station dcat="pallas-sodankyla-stations" mmd="Pallas-Sodankylä Atmosphere-Ecosystem Supersite" polarin="True" resource="https://fmiarc.fmi.fi"/>
+    <mapping:station dcat="tarfala-research-station" mmd="Tarfala Research Station" polarin="True" resource="https://www.su.se/tarfala-research-station/"/>
+    <mapping:station dcat="western-arctic-research-centre" mmd="Western Arctic Research Centre" polarin="True" resource="https://nwtresearch.com/"/>
+    <mapping:station dcat="cen-whapmagoostui-kuujuarapik-research-station" mmd="CEN Whapmagoostui-Kuujuarapik Research Station" polarin="True" resource="https://www.cen.ulaval.ca/en/"/>
+    <mapping:station dcat="greenland-institute-of-natural-resources" mmd="Greenland Institute of Natural Resources" polarin="True" resource="https://natur.gl/?lang=en"/>
+    <!--non polarin-->
+    <mapping:station dcat="churchill-northern-studies-centre" mmd="Churchill Northern Studies Centre" polarin="False"/>
+    <mapping:station dcat="faroe-islands-nature-investigation" mmd="Faroe Islands Nature Investigation" polarin="False"/>
+    <mapping:station dcat="hyytiala-forestry-reseatch-station-smear-ii" mmd="Hyytiälä Forestry Research Station (SMEAR II)" polarin="False" resource="https://www.atm.helsinki.fi/smear/smear-ii/"/>
+    <mapping:station dcat="kainuu-fisheries-research-station" mmd="Kainuu Fisheries Research Station" polarin="False" resource="https://www.luke.fi/en/research/research-infrastructures/kainuu-fisheries-research-station-kfrs-infrastructure" />
+    <mapping:station dcat="kluane-lake-research-station" mmd="Kluane Lake Research Station" polarin="False" resource="https://klrs.ca/" />
+    <mapping:station dcat="mm-klapa-research-station" mmd="M.M. Klapa Research Station" polarin="False" resource="https://www.igipz.pan.pl/hala-gasienicowa-zbg.html"/>
+    <mapping:station dcat="svanhovd-research-station" mmd="NIBIO Svanhovd Research Station" polarin="False"/>
+    <mapping:station dcat="sonnblick-observatory" mmd="Sonnblick Observatory" polarin="False" resource="https://www.sonnblick.net/en/"/>
+    <mapping:station dcat="station-hintereis" mmd="Station Hintereis" polarin="False" resource="https://www.uibk.ac.at/projects/station-hintereis-opal-data/index.html.en"/>
+    <mapping:station dcat="svartberget-research-station" mmd="Svartberget Research Station" polarin="False" resource="https://www.slu.se/en/about-slu/organisation/departments/field-based-forest-research/experiemental-forests-and-stations/svartberget-research-station/"/>
+    <mapping:station dcat="toolik-field-station" mmd="Toolik Field Station" polarin="False" resource="https://www.uaf.edu/toolik/"/>
+    <mapping:station dcat="varrio-subarctic-research-station" mmd="Värriö Subarctic Research Station" polarin="False" resource="https://www.helsinki.fi/en/research-stations/varrio-subarctic-research-station"/>
+
 </xsl:stylesheet>