golsch · Oct 5, 2026 · Oct 13, 2026 · Oct 27, 2026 · Oct 29, 2026 · Oct 29, 2026
diff --git a/mir-module/src/main/resources/config/mir/deprecated.properties b/mir-module/src/main/resources/config/mir/deprecated.properties
@@ -7,5 +7,6 @@ MCR.Access.Strategy.SubmittedCategory=MCR.Access.Strategy.SubmittedCategories
 MIR.Viewer.DisableDerivateType=MCR.Derivate.DisplayFilters.mir.Filter.Filters.20.Mappings.show-file-viewer.[thumbnail,...]
 MIR.OwnerStrategy.FallbackClass=MIR.OwnerStrategy.Fallback.Class
 MIR.Metadata.Admindata.ShowRealUserName=MIR.AdmindataBox.ShowRealUserName
+MIR.Metadata.Navigation.SeriesPanel.RSS.Enabled=MIR.GuidancePanel.RSS.Enabled
 MCR.Alias.prefix=MIR.Alias.Prefix
 MCR.Alias.Filepattern=MIR.Alias.LayoutFilePattern
diff --git a/mir-module/src/main/resources/config/mir/messages_de.properties b/mir-module/src/main/resources/config/mir/messages_de.properties
@@ -400,6 +400,7 @@ mir.form.editor.dynamic.header.in                                              =
 mir.form.editor.dynamic.partof                                                 = Erschienen in
 mir.geographic                                                                 = Geografischer Ort:
 mir.geographic.gnd.type                                                        = GND:
+mir.guidancePanel.search                                                       = Suche in {0}
 mir.help.abstract                                                              = Eine kurze Beschreibung des Datensatzes und des Kontextes (z.B. Zweck, Methoden der Datenerzeugung, r\u00E4umliche und zeitliche Eigenschaften, Datenqualit\u00E4t, Herkunft).
 mir.help.abstract.aslink                                                       = Ist ein Abstract bereits im Web verf\u00FCgbar, kann dieses auch direkt verlinkt werden.
 mir.help.abstract.language                                                     = Geben Sie die Sprache an, in der das hier ver\u00F6ffentlichte Abstract verfasst ist. Bei Zusammenfassungen in verschiedenen Sprachen k\u00F6nnen Sie diese mit dem \u201E+\u201C-Button wiederholen.

diff --git a/mir-module/src/main/resources/config/mir/messages_en.properties b/mir-module/src/main/resources/config/mir/messages_en.properties
@@ -388,6 +388,7 @@ mir.form.editor.dynamic.header.in                                              =
 mir.form.editor.dynamic.partof                                                 = Part of
 mir.geographic                                                                 = Geographic place:
 mir.geographic.gnd.type                                                        = GND:
+mir.guidancePanel.search                                                       = Search in {0}
 mir.help.abstract                                                              = A human readable description of the dataset and its context (e.g. purpose and methodology of data creation, spatio-temporal characteristics, data quality, provenance).
 mir.help.abstract.aslink                                                       = Weblink to abstract.
 mir.help.abstract.ortext                                                       = A short summary of the document content.

diff --git a/mir-module/src/main/resources/config/mir/mycore.properties b/mir-module/src/main/resources/config/mir/mycore.properties
@@ -396,6 +396,14 @@ MCR.ContentTransformer.mycoreobject-podcast.Stylesheet=xslt/mir/export/mycoreobj
 # Apple requires an image of 3000x3000
 MCR.IIIFImage.thumbnail.MaxImageBytes=27000000
 
+##############################################################################
+# RSS feed                                                                   #
+##############################################################################
+MCR.ContentTransformer.mycoreobject-rss.Stylesheet=xslt/mir/export/mycoreobject2rss.xsl
+MCR.LayoutTransformerFactory.Default.Ignore=%MCR.LayoutTransformerFactory.Default.Ignore%,mycoreobject-rss
+# Optional name of the generator in the RSS feed, e.g. MIR: MyCoRe/MODS Institutional Repository
+#MIR.RSS.Generator=
+
 ##############################################################################
 # ReCaptcha for self registration                                            #
 ##############################################################################
@@ -826,7 +834,7 @@ MCR.ContentTransformer.mycoreobject.Steps=mycoreobject-modsmeta,newMetadataStyle
 
 MIR.Layout.Top=mir-breadcrumb,search_browsing,mir-message
 MIR.Layout.Start=mir-abstract-badges,mir-workflow,mir-abstract-title,mir-abstract-plus,toc,mir-file-upload,mir-viewer,mir-player,mir-collapse-files,mir-metadata
-MIR.Layout.End=mir-edit,mir-citation,mir-thumbnail,mir-epusta,mir-access-rights,mir-export,mir-admindata,mir-historydata,
+MIR.Layout.End=mir-edit,mir-guidance-panel,mir-citation,mir-thumbnail,mir-epusta,mir-access-rights,mir-export,mir-admindata,mir-historydata,
 MIR.Layout.Bottom=
 
 #MIR.Layout.Start.Col=col-12 col-lg-8
@@ -884,6 +892,21 @@ MCR.Startup.Class = %MCR.Startup.Class%,org.mycore.mir.migration.MIRMigrateStati
 ##############################################################################
 #MIR.Maintenance.File=%MCR.basedir%/maintenance.xml
 
+##############################################################################
+# Guidance panel                                                             #
+##############################################################################
+# Enables the guidance panel on the metadata page, in the result list of a series search (q or fq=mods.relatedItem.root:{id})
+# and in MyCoReWebPages
+MIR.GuidancePanel.Enabled=false
+# Shows a link to the RSS feed of the series (see RSS feed) in the panel
+MIR.GuidancePanel.RSS.Enabled=true
+MCR.URIResolver.xslImports.modsmeta=%MCR.URIResolver.xslImports.modsmeta%,mir/object-page/boxes/guidance-panel.xsl
+MCR.URIResolver.xslIncludes.MyCoReWebPage=%MCR.URIResolver.xslIncludes.MyCoReWebPage%,resource:xslt/mir/guidance-panel/webpage.xsl
+# navigation derivates (navigation.xml, banner, web pages) are not shown in the object view and not exported
+MCR.Derivate.DisplayFilters.mir.Filter.Filters.20.Mappings.show-file-viewer.navigation=false
+MCR.Derivate.DisplayFilters.mir.Filter.Filters.20.Mappings.show-file-area.navigation=false
+MCR.Derivate.DisplayFilters.mir.Filter.Filters.20.Mappings.export.navigation=false
+
 ##############################################################################
 # Alias                                                                      #
 ##############################################################################

diff --git a/mir-module/src/main/resources/config/mir/solr/main/solr-schema.json b/mir-module/src/main/resources/config/mir/solr/main/solr-schema.json
@@ -376,5 +376,14 @@
       "source": "mods.nameIdentifier",
       "dest": "mods.nameIdentifier.id"
     }
+  },
+  {
+    "add-field": {
+      "name": "mods.relatedItem.root",
+      "type": "string",
+      "indexed": true,
+      "stored": true,
+      "multiValued": true
+    }
   }
 ]
diff --git a/mir-module/src/main/resources/xslt/mir/export/mycoreobject2rss.xsl b/mir-module/src/main/resources/xslt/mir/export/mycoreobject2rss.xsl
@@ -0,0 +1,110 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsl:stylesheet version="3.0"
+  xmlns:mcracl="http://www.mycore.de/xslt/acl"
+  xmlns:mcrproperty="http://www.mycore.de/xslt/property"
+  xmlns:mods="http://www.loc.gov/mods/v3"
+  xmlns:xs="http://www.w3.org/2001/XMLSchema"
+  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+  exclude-result-prefixes="#all">
+
+  <xsl:include href="resource:xslt/default-parameters.xsl" />
+  <xsl:include href="xslInclude:functions" />
+
+  <xsl:output method="xml" encoding="UTF-8" media-type="application/rss+xml" indent="yes" />
+
+  <xsl:template match="/">
+    <rss version="2.0">
+      <xsl:apply-templates select="mycoreobject" mode="channel" />
+    </rss>
+  </xsl:template>
+
+  <xsl:template match="mycoreobject" mode="channel">
+    <xsl:variable name="mods" select="metadata/def.modsContainer/modsContainer/mods:mods" />
+    <xsl:variable name="generator" select="mcrproperty:get('MIR.RSS.Generator')" />
+    <channel>
+      <xsl:apply-templates select="$mods/mods:titleInfo[1]" />
+      <xsl:call-template name="render-rss-link" />
+      <xsl:choose>
+        <xsl:when test="$mods/mods:abstract[normalize-space()]">
+          <xsl:apply-templates select="$mods/mods:abstract[normalize-space()][1]" />
+        </xsl:when>
+        <xsl:otherwise>
+          <!-- description is required for a channel -->
+          <description>
+            <xsl:apply-templates select="$mods/mods:titleInfo[1]" mode="text" />
+          </description>
+        </xsl:otherwise>
+      </xsl:choose>
+      <xsl:apply-templates select="$mods/mods:language[mods:languageTerm[@type = 'code']][1]" />
+      <xsl:if test="$generator">
+        <generator>
+          <xsl:value-of select="$generator" />
+        </generator>
+      </xsl:if>
+      <docs>https://www.rssboard.org/rss-specification</docs>
+      <xsl:variable name="query" select="concat('solr:q=', encode-for-uri(concat('mods.relatedItem.root:', @ID)),
+        '&amp;fl=id&amp;rows=20&amp;sort=', encode-for-uri('mods.dateIssued desc,mods.dateIssued.host desc'))" />
+      <!-- the Solr query does not check permissions, so only readable objects are listed -->
+      <xsl:for-each select="document($query)/response/result/doc/str[@name = 'id'][mcracl:check-permission(., 'read')]">
+        <xsl:apply-templates select="document(concat('mcrobject:', .))/mycoreobject" mode="item" />
+      </xsl:for-each>
+    </channel>
+  </xsl:template>
+
+  <xsl:template match="mycoreobject" mode="item">
+    <xsl:variable name="mods" select="metadata/def.modsContainer/modsContainer/mods:mods" />
+    <item>
+      <xsl:apply-templates select="$mods/mods:titleInfo[1]" />
+      <xsl:call-template name="render-rss-link" />
+      <xsl:apply-templates select="$mods/mods:abstract[normalize-space()][1]" />
+      <xsl:apply-templates select="service/servdates/servdate[@type = 'modifydate'][. castable as xs:dateTime]" />
+      <guid>
+        <xsl:value-of select="concat($WebApplicationBaseURL, 'receive/', @ID)" />
+      </guid>
+    </item>
+  </xsl:template>
+
+  <xsl:template name="render-rss-link">
+    <link>
+      <xsl:value-of select="concat($WebApplicationBaseURL, 'receive/', @ID)" />
+    </link>
+  </xsl:template>
+
+  <xsl:template match="mods:titleInfo">
+    <title>
+      <xsl:apply-templates select="." mode="text" />
+    </title>
+  </xsl:template>
+
+  <xsl:template match="mods:titleInfo" mode="text">
+    <xsl:value-of select="mods:nonSort, mods:title" separator=" " />
+    <xsl:if test="mods:subTitle">
+      <!-- separate the subtitle by a colon, unless the title ends with a punctuation mark -->
+      <xsl:if test="not(matches(mods:title, '[?!.:,;-]$'))">
+        <xsl:text>:</xsl:text>
+      </xsl:if>
+      <xsl:value-of select="concat(' ', mods:subTitle)" />
+    </xsl:if>
+  </xsl:template>
+
+  <xsl:template match="mods:abstract">
+    <description>
+      <xsl:value-of select="." />
+    </description>
+  </xsl:template>
+
+  <xsl:template match="mods:language">
+    <language>
+      <xsl:value-of select="mods:languageTerm[@type = 'code'][1]" />
+    </language>
+  </xsl:template>
+
+  <!-- RFC 822 date as required by RSS, e.g. Mon, 05 Oct 2026 12:00:00 +0200 -->
+  <xsl:template match="servdate">
+    <pubDate>
+      <xsl:value-of select="format-dateTime(xs:dateTime(.),
+        '[FNn,3-3], [D01] [MNn,3-3] [Y0001] [H01]:[m01]:[s01] [Z0000]', 'en', (), ())" />
+    </pubDate>
+  </xsl:template>
+
+</xsl:stylesheet>
diff --git a/mir-module/src/main/resources/xslt/mir/functions/mirmods.xsl b/mir-module/src/main/resources/xslt/mir/functions/mirmods.xsl
@@ -3,6 +3,7 @@
   xmlns:mcrmods="http://www.mycore.de/xslt/mods"
   xmlns:mirmods="http://www.mycore.de/xslt/mirmods"
   xmlns:mods="http://www.loc.gov/mods/v3"
+  xmlns:xlink="http://www.w3.org/1999/xlink"
   xmlns:xs="http://www.w3.org/2001/XMLSchema"
   xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
   exclude-result-prefixes="#all">
@@ -20,4 +21,12 @@
     </xsl:if>
   </xsl:function>
 
+  <xsl:function name="mirmods:root-ids" as="xs:string*">
+    <xsl:param name="parent" as="element()" />
+    <xsl:for-each select="$parent/mods:relatedItem[@type = ('host', 'series')][@xlink:href]">
+      <xsl:variable name="ancestor-ids" select="mirmods:root-ids(.)" />
+      <xsl:sequence select="if (exists($ancestor-ids)) then $ancestor-ids else string(@xlink:href)" />
+    </xsl:for-each>
+  </xsl:function>
+
 </xsl:stylesheet>
diff --git a/mir-module/src/main/resources/xslt/mir/guidance-panel/functions/mirguidancepanel.xsl b/mir-module/src/main/resources/xslt/mir/guidance-panel/functions/mirguidancepanel.xsl
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsl:stylesheet version="3.0"
+  xmlns:mcracl="http://www.mycore.de/xslt/acl"
+  xmlns:mcrproperty="http://www.mycore.de/xslt/property"
+  xmlns:mirguidancepanel="http://www.mycore.de/xslt/mirguidancepanel"
+  xmlns:xs="http://www.w3.org/2001/XMLSchema"
+  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+  exclude-result-prefixes="#all">
+
+  <xsl:function name="mirguidancepanel:is-enabled" as="xs:boolean">
+    <xsl:sequence select="lower-case(mcrproperty:get('MIR.GuidancePanel.Enabled')) = 'true'" />
+  </xsl:function>
+
+  <xsl:function name="mirguidancepanel:is-rss-enabled" as="xs:boolean">
+    <xsl:sequence select="lower-case(mcrproperty:get('MIR.GuidancePanel.RSS.Enabled')) = 'true'" />
+  </xsl:function>
+
+  <!--
+    true if the id is a MyCoRe ID readable by the current user; the id may come from request parameters,
+    the format is checked first because checkPermission fails for ids containing a colon
+  -->
+  <xsl:function name="mirguidancepanel:is-readable" as="xs:boolean">
+    <xsl:param name="id" as="xs:string" />
+    <xsl:sequence select="matches($id, '^[a-zA-Z][a-zA-Z0-9]*_[a-zA-Z0-9]+_[0-9]+$')
+      and mcracl:check-permission($id, 'read')" />
+  </xsl:function>
+
+  <!-- label in the current language, falls back to the default language and then to the first label -->
+  <xsl:function name="mirguidancepanel:label" as="xs:string">
+    <xsl:param name="labels" as="element(label)*" />
+    <xsl:param name="current-lang" as="xs:string" />
+    <xsl:param name="default-lang" as="xs:string" />
+    <xsl:sequence select="string(($labels[lang($current-lang)], $labels[lang($default-lang)], $labels)[1])" />
+  </xsl:function>
+
+</xsl:stylesheet>
diff --git a/mir-module/src/main/resources/xslt/mir/guidance-panel/render.xsl b/mir-module/src/main/resources/xslt/mir/guidance-panel/render.xsl
@@ -0,0 +1,128 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsl:stylesheet version="3.0"
+  xmlns:mcrderivate="http://www.mycore.de/xslt/derivate"
+  xmlns:mcri18n="http://www.mycore.de/xslt/i18n"
+  xmlns:mcrobject="http://www.mycore.de/xslt/object"
+  xmlns:mirguidancepanel="http://www.mycore.de/xslt/mirguidancepanel"
+  xmlns:xlink="http://www.w3.org/1999/xlink"
+  xmlns:xs="http://www.w3.org/2001/XMLSchema"
+  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+  exclude-result-prefixes="#all">
+
+  <xsl:include href="resource:xslt/mir/guidance-panel/functions/mirguidancepanel.xsl" />
+
+  <xsl:param name="CurrentLang" />
+  <xsl:param name="DefaultLang" />
+  <xsl:param name="ServletsBaseURL" />
+  <xsl:param name="WebApplicationBaseURL" />
+
+  <xsl:template name="render-guidance-panels">
+    <xsl:param name="object-id" as="xs:string" />
+    <xsl:if test="mirguidancepanel:is-readable($object-id)">
+      <xsl:for-each select="mcrobject:get($object-id)/mycoreobject/structure/derobjects
+        /derobject[classification[@classid = 'derivate_types'][@categid = 'navigation']]">
+        <xsl:call-template name="render-guidance-panel">
+          <xsl:with-param name="object-id" select="$object-id" />
+          <xsl:with-param name="derivate-id" select="string(@xlink:href)" />
+        </xsl:call-template>
+      </xsl:for-each>
+    </xsl:if>
+  </xsl:template>
+
+  <xsl:template name="render-guidance-panel">
+    <xsl:param name="object-id" as="xs:string" />
+    <xsl:param name="derivate-id" as="xs:string" />
+    <xsl:variable name="navigation" select="if (mirguidancepanel:is-readable($object-id)
+      and mirguidancepanel:is-readable($derivate-id)) then mcrderivate:get-file($derivate-id, 'navigation.xml')/item else ()" />
+    <xsl:if test="$navigation">
+      <xsl:variable name="title" select="mirguidancepanel:label($navigation/label, $CurrentLang, $DefaultLang)" />
+      <div class="mir-guidance-panel">
+        <div class="card">
+          <xsl:if test="normalize-space($navigation/@banner)">
+            <xsl:call-template name="render-guidance-panel-banner">
+              <xsl:with-param name="object-id" select="$object-id" />
+              <xsl:with-param name="banner" select="string($navigation/@banner)" />
+              <xsl:with-param name="title" select="$title" />
+            </xsl:call-template>
+          </xsl:if>
+          <div class="card-header">
+            <h3 class="card-title">
+              <xsl:value-of select="$title" />
+            </h3>
+          </div>
+          <div class="card-body">
+            <ul>
+              <xsl:for-each select="$navigation/item">
+                <xsl:call-template name="render-guidance-panel-item">
+                  <xsl:with-param name="item" select="." />
+                </xsl:call-template>
+              </xsl:for-each>
+              <xsl:if test="mirguidancepanel:is-rss-enabled()">
+                <xsl:call-template name="render-guidance-panel-rss-item">
+                  <xsl:with-param name="object-id" select="$object-id" />
+                </xsl:call-template>
+              </xsl:if>
+            </ul>
+          </div>
+          <div class="card-footer">
+            <xsl:call-template name="render-guidance-panel-search-form">
+              <xsl:with-param name="object-id" select="$object-id" />
+              <xsl:with-param name="derivate-id" select="$derivate-id" />
+              <xsl:with-param name="title" select="$title" />
+            </xsl:call-template>
+          </div>
+        </div>
+      </div>
+    </xsl:if>
+  </xsl:template>
+
+  <xsl:template name="render-guidance-panel-banner">
+    <xsl:param name="object-id" as="xs:string" />
+    <xsl:param name="banner" as="xs:string" />
+    <xsl:param name="title" as="xs:string" />
+    <a class="mir-guidance-panel-banner" href="{$WebApplicationBaseURL}receive/{$object-id}">
+      <img src="{$WebApplicationBaseURL}{$banner}" class="card-img-top" alt="{$title}" />
+    </a>
+  </xsl:template>
+
+  <xsl:template name="render-guidance-panel-search-form">
+    <xsl:param name="object-id" as="xs:string" />
+    <xsl:param name="derivate-id" as="xs:string" />
+    <xsl:param name="title" as="xs:string" />
+    <!-- unique, a page may contain several panels -->
+    <xsl:variable name="input-id" select="concat('mir-guidance-panel-search-', $derivate-id)" />
+    <xsl:variable name="search-label" select="mcri18n:translate-with-params('mir.guidancePanel.search', $title)" />
+    <form role="search" action="{$ServletsBaseURL}solr/find">
+      <input type="hidden" name="fq" value="mods.relatedItem.root:{$object-id}" />
+      <label class="visually-hidden" for="{$input-id}">
+        <xsl:value-of select="$search-label" />
+      </label>
+      <div class="input-group">
+        <input id="{$input-id}" type="text" name="condQuery" class="form-control" placeholder="{$search-label}" />
+        <button class="btn btn-primary" type="submit" aria-label="{$search-label}">
+          <i class="fas fa-search" />
+        </button>
+      </div>
+    </form>
+  </xsl:template>
+
+  <xsl:template name="render-guidance-panel-rss-item">
+    <xsl:param name="object-id" as="xs:string" />
+    <li>
+      <a href="{$WebApplicationBaseURL}receive/{$object-id}?XSL.Style=rss">
+        <i class="fas fa-rss" />
+        <xsl:text> RSS 2.0 Feed</xsl:text>
+      </a>
+    </li>
+  </xsl:template>
+
+  <xsl:template name="render-guidance-panel-item">
+    <xsl:param name="item" as="element(item)" />
+    <li>
+      <a href="{if (starts-with($item/@ref, 'http')) then $item/@ref else concat($WebApplicationBaseURL, $item/@ref)}">
+        <xsl:value-of select="mirguidancepanel:label($item/label, $CurrentLang, $DefaultLang)" />
+      </a>
+    </li>
+  </xsl:template>
+
+</xsl:stylesheet>