diff --git a/src/eodem-0.08.xsl b/src/eodem-0.08.xsl
index 62b5413..433eb1f 100644
--- a/src/eodem-0.08.xsl
+++ b/src/eodem-0.08.xsl
@@ -15,7 +15,21 @@
                     <xsl:value-of select="concat(md_version, 'institution/', institution_id)" disable-output-escaping="yes" />
                 </xsl:attribute>
                 <xsl:attribute name="lido:type">local</xsl:attribute>
-                <xsl:value-of select="institution_isil" />
+                <!-- ISIL -->
+                <xsl:choose>
+                    <xsl:when test="collectionSet/sammlung_isil != ''">
+                        <xsl:value-of select="collectionSet/sammlung_isil" />
+                    </xsl:when>
+                    <xsl:otherwise>
+                        <xsl:if test="institution_isil != ''">
+                            <xsl:value-of select="institution_isil" />
+                        </xsl:if>
+                        <xsl:if test="institution_isil = ''">
+                            <xsl:value-of select="institution_id" />
+                        </xsl:if>
+                    </xsl:otherwise>
+                </xsl:choose>
+                <!-- End of ISIL -->
                 <xsl:value-of select="'/'" />
                 <xsl:value-of select="objekt_id" />
             </lido:lidoRecID>
diff --git a/src/lido-1.0-ccc.xsl b/src/lido-1.0-ccc.xsl
index 3ff0dc2..8a83df1 100644
--- a/src/lido-1.0-ccc.xsl
+++ b/src/lido-1.0-ccc.xsl
@@ -15,7 +15,21 @@
                     <xsl:value-of select="concat(md_version, 'institution/', institution_id)" disable-output-escaping="yes" />
                 </xsl:attribute>
                 <xsl:attribute name="lido:type">local</xsl:attribute>
-                <xsl:value-of select="institution_isil" />
+                <!-- ISIL -->
+                <xsl:choose>
+                    <xsl:when test="collectionSet/sammlung_isil != ''">
+                        <xsl:value-of select="collectionSet/sammlung_isil" />
+                    </xsl:when>
+                    <xsl:otherwise>
+                        <xsl:if test="institution_isil != ''">
+                            <xsl:value-of select="institution_isil" />
+                        </xsl:if>
+                        <xsl:if test="institution_isil = ''">
+                            <xsl:value-of select="institution_id" />
+                        </xsl:if>
+                    </xsl:otherwise>
+                </xsl:choose>
+                <!-- End of ISIL -->
                 <xsl:value-of select="'/'" />
                 <xsl:value-of select="objekt_id" />
             </lido:lidoRecID>
diff --git a/src/lido-1.0.xsl b/src/lido-1.0.xsl
index 3233646..c504a02 100644
--- a/src/lido-1.0.xsl
+++ b/src/lido-1.0.xsl
@@ -4,7 +4,7 @@
   xmlns:gml="http://www.opengis.net/gml">
     <xsl:output method="xml" omit-xml-declaration="no" encoding="UTF-8" indent="yes"/>
     <xsl:template match="/">
-        <lido:lidoWrap xmlns:lido="http://www.lido-schema.org" xmlns:gml="http://www.opengis.net/gml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.lido-schema.org http://www.lido-schema.org/schema/v1.0/lido-v1.0.xsd http://www.opengis.net/gml http://schemas.opengis.net/gml/3.1.1/base/feature.xsd"> 
+        <lido:lidoWrap xmlns:lido="http://www.lido-schema.org" xmlns:gml="http://www.opengis.net/gml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.lido-schema.org http://www.lido-schema.org/schema/v1.0/lido-v1.0.xsd http://www.opengis.net/gml http://schemas.opengis.net/gml/3.1.1/base/feature.xsd">
             <xsl:apply-templates select="/root"/>
         </lido:lidoWrap>
     </xsl:template>
@@ -15,7 +15,21 @@
                     <xsl:value-of select="concat(md_version, 'institution/', institution_id)" disable-output-escaping="yes" />
                 </xsl:attribute>
                 <xsl:attribute name="lido:type">local</xsl:attribute>
-                <xsl:value-of select="institution_isil" />
+                <!-- ISIL -->
+                <xsl:choose>
+                    <xsl:when test="collectionSet/sammlung_isil != ''">
+                        <xsl:value-of select="collectionSet/sammlung_isil" />
+                    </xsl:when>
+                    <xsl:otherwise>
+                        <xsl:if test="institution_isil != ''">
+                            <xsl:value-of select="institution_isil" />
+                        </xsl:if>
+                        <xsl:if test="institution_isil = ''">
+                            <xsl:value-of select="institution_id" />
+                        </xsl:if>
+                    </xsl:otherwise>
+                </xsl:choose>
+                <!-- End of ISIL -->
                 <xsl:value-of select="'/'" />
                 <xsl:value-of select="objekt_id" />
             </lido:lidoRecID>
diff --git a/src/lido-1.1.xsl b/src/lido-1.1.xsl
index bf5813f..b8f4170 100644
--- a/src/lido-1.1.xsl
+++ b/src/lido-1.1.xsl
@@ -15,7 +15,21 @@
                     <xsl:value-of select="concat(md_version, 'institution/', institution_id)" disable-output-escaping="yes" />
                 </xsl:attribute>
                 <xsl:attribute name="lido:type">local</xsl:attribute>
-                <xsl:value-of select="institution_isil" />
+                <!-- ISIL -->
+                <xsl:choose>
+                    <xsl:when test="collectionSet/sammlung_isil != ''">
+                        <xsl:value-of select="collectionSet/sammlung_isil" />
+                    </xsl:when>
+                    <xsl:otherwise>
+                        <xsl:if test="institution_isil != ''">
+                            <xsl:value-of select="institution_isil" />
+                        </xsl:if>
+                        <xsl:if test="institution_isil = ''">
+                            <xsl:value-of select="institution_id" />
+                        </xsl:if>
+                    </xsl:otherwise>
+                </xsl:choose>
+                <!-- End of ISIL -->
                 <xsl:value-of select="'/'" />
                 <xsl:value-of select="objekt_id" />
             </lido:lidoRecID>