diff --git a/build.gradle b/build.gradle
index c25da96..0d98775 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 plugins {
     id "org.sonarqube" version "2.2"
     id "org.ajoberstar.github-pages" version "1.6.0-rc.1"
-    id "org.xbib.gradle.plugin.jbake" version "1.1.0"
+    id "org.xbib.gradle.plugin.jbake" version "1.2.1"
 }
 
 
@@ -14,7 +14,7 @@ ext {
 allprojects {
 
     group = 'org.xbib'
-    version = '1.0.3'
+    version = '1.0.4'
 
     apply plugin: 'java'
     apply plugin: 'maven'
diff --git a/content-core/src/main/java/org/xbib/content/settings/Settings.java b/content-core/src/main/java/org/xbib/content/settings/Settings.java
index fd1b080..482a874 100644
--- a/content-core/src/main/java/org/xbib/content/settings/Settings.java
+++ b/content-core/src/main/java/org/xbib/content/settings/Settings.java
@@ -661,7 +661,7 @@ public class Settings {
          */
         public Builder loadFromSystemProperties() {
             for (Map.Entry<Object, Object> entry : System.getProperties().entrySet()) {
-                put((String)entry.getKey(), (String)entry.getValue());
+                put((String) entry.getKey(), (String) entry.getValue());
             }
             return this;
         }
diff --git a/content-rdf/src/main/java/org/xbib/content/rdf/io/rdfxml/RdfXmlContentParser.java b/content-rdf/src/main/java/org/xbib/content/rdf/io/rdfxml/RdfXmlContentParser.java
index 27c54a4..cb95be1 100644
--- a/content-rdf/src/main/java/org/xbib/content/rdf/io/rdfxml/RdfXmlContentParser.java
+++ b/content-rdf/src/main/java/org/xbib/content/rdf/io/rdfxml/RdfXmlContentParser.java
@@ -127,6 +127,10 @@ public class RdfXmlContentParser<R extends RdfContentParams> implements RdfConst
         return this;
     }
 
+    public RdfContentBuilder<R> getBuilder() {
+        return builder;
+    }
+
     public XmlHandler<R> getHandler() {
         return xmlHandler;
     }
@@ -359,6 +363,32 @@ public class RdfXmlContentParser<R extends RdfContentParams> implements RdfConst
         return l;
     }
 
+    /**
+     * Allow to override this method to control triple stream generation.
+     * @param triple a triple
+     * @throws IOException if yield does not work
+     */
+    protected void yield(Triple triple) throws IOException {
+        if (builder != null) {
+            builder.receive(triple);
+        }
+    }
+
+    private void yield(Object s, Object p, Object o) throws IOException {
+        yield(new DefaultTriple(resource.newSubject(s), resource.newPredicate(p), resource.newObject(o)));
+    }
+
+    // produce a (possibly) reified triple
+    private void yield(Object s, IRI p, Object o, IRI reified) throws IOException {
+        yield(s, p, o);
+        if (reified != null) {
+            yield(reified, RDF_TYPE, RDF_STATEMENT);
+            yield(reified, RDF_SUBJECT, s);
+            yield(reified, RDF_PREDICATE, p);
+            yield(reified, RDF_OBJECT, o);
+        }
+    }
+
     private static class Frame {
         IRI node = null; // the subject/object
         String lang = null; // the language tag
@@ -638,27 +668,6 @@ public class RdfXmlContentParser<R extends RdfContentParams> implements RdfConst
             return b;
         }
 
-        // produce a (possibly) reified triple
-        private void yield(Object s, IRI p, Object o, IRI reified) throws IOException {
-            yield(s, p, o);
-            if (reified != null) {
-                yield(reified, RDF_TYPE, RDF_STATEMENT);
-                yield(reified, RDF_SUBJECT, s);
-                yield(reified, RDF_PREDICATE, p);
-                yield(reified, RDF_OBJECT, o);
-            }
-        }
-
-        private void yield(Object s, Object p, Object o) throws IOException {
-            yield(new DefaultTriple(resource.newSubject(s), resource.newPredicate(p), resource.newObject(o)));
-        }
-
-        private void yield(Triple triple) throws IOException {
-            if (builder != null) {
-                builder.receive(triple);
-            }
-        }
-
         // if we're looking at a subject, is it an item in a Collection?
         private boolean isCollectionItem(Deque<Frame> stack) throws SAXException {
             if (inPredicate(stack)) {
@@ -668,6 +677,5 @@ public class RdfXmlContentParser<R extends RdfContentParams> implements RdfConst
                 return false;
             }
         }
-
     }
 }
diff --git a/content-rdf/src/main/java/org/xbib/content/rdf/io/xml/AbstractXmlHandler.java b/content-rdf/src/main/java/org/xbib/content/rdf/io/xml/AbstractXmlHandler.java
index 5397d6e..6f38534 100644
--- a/content-rdf/src/main/java/org/xbib/content/rdf/io/xml/AbstractXmlHandler.java
+++ b/content-rdf/src/main/java/org/xbib/content/rdf/io/xml/AbstractXmlHandler.java
@@ -53,6 +53,10 @@ public abstract class AbstractXmlHandler<P extends RdfContentParams>
         return resource;
     }
 
+    public LinkedList<QName> getParents() {
+        return parents;
+    }
+
     @Override
     public AbstractXmlHandler<P> setDefaultNamespace(String prefix, String namespaceURI) {
         this.defaultPrefix = prefix;
diff --git a/content-rdf/src/main/java/org/xbib/content/rdf/util/TreeMultiMap.java b/content-rdf/src/main/java/org/xbib/content/rdf/util/TreeMultiMap.java
new file mode 100644
index 0000000..545dedc
--- /dev/null
+++ b/content-rdf/src/main/java/org/xbib/content/rdf/util/TreeMultiMap.java
@@ -0,0 +1,97 @@
+package org.xbib.content.rdf.util;
+
+import java.util.Collection;
+import java.util.LinkedHashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+
+/**
+ * A {@link TreeMap} based multi map. The keys ore ordered.
+ * @param <K> te key type
+ * @param <V> the value type
+ */
+public class TreeMultiMap<K, V> implements MultiMap<K, V> {
+
+    private final Map<K, Set<V>> map = new TreeMap<>();
+
+    @Override
+    public int size() {
+        return map.size();
+    }
+
+    @Override
+    public void clear() {
+        map.clear();
+    }
+
+    @Override
+    public boolean isEmpty() {
+        return map.isEmpty();
+    }
+
+    @Override
+    public boolean containsKey(K key) {
+        return map.containsKey(key);
+    }
+
+    @Override
+    public Set<K> keySet() {
+        return map.keySet();
+    }
+
+    @Override
+    public boolean put(K key, V value) {
+        Set<V> set = map.get(key);
+        if (set == null) {
+            set = new LinkedHashSet<>();
+            set.add(value);
+            map.put(key, set);
+            return true;
+        } else {
+            set.add(value);
+            return false;
+        }
+    }
+
+    @Override
+    public void putAll(K key, Collection<V> values) {
+        Set<V> set = map.get(key);
+        if (set == null) {
+            set = new LinkedHashSet<>();
+            map.put(key, set);
+        }
+        set.addAll(values);
+    }
+
+    @Override
+    public Collection<V> get(K key) {
+        return map.get(key);
+    }
+
+    @Override
+    public Set<V> remove(K key) {
+        return map.remove(key);
+    }
+
+    @Override
+    public boolean remove(K key, V value) {
+        Set<V> set = map.get(key);
+        return set != null && set.remove(value);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return obj != null && obj instanceof TreeMultiMap && map.equals(((TreeMultiMap) obj).map);
+    }
+
+    @Override
+    public int hashCode() {
+        return map.hashCode();
+    }
+
+    @Override
+    public String toString() {
+        return map.toString();
+    }
+}
diff --git a/content-rdf/src/test/java/org/xbib/content/rdf/util/MultiMapTest.java b/content-rdf/src/test/java/org/xbib/content/rdf/util/MultiMapTest.java
new file mode 100644
index 0000000..a6a6af0
--- /dev/null
+++ b/content-rdf/src/test/java/org/xbib/content/rdf/util/MultiMapTest.java
@@ -0,0 +1,43 @@
+package org.xbib.content.rdf.util;
+
+import org.junit.Test;
+
+import java.util.Arrays;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+/**
+ *
+ */
+public class MultiMapTest {
+
+    @Test
+    public void testLinkedHashMultiMap() {
+        LinkedHashMultiMap<String,String> map = new LinkedHashMultiMap<>();
+        map.put("a", "b");
+        map.put("b", "c");
+        map.put("a", "c");
+        assertTrue(map.containsKey("a"));
+        assertTrue(map.containsKey("b"));
+        assertEquals("[b, c]", map.get("a").toString());
+        assertEquals("[c]", map.get("b").toString());
+        map.putAll("a", Arrays.asList("d", "e"));
+        assertEquals("[b, c, d, e]", map.get("a").toString());
+    }
+
+    @Test
+    public void testTreeMultiMap() {
+        TreeMultiMap<String,String> map = new TreeMultiMap<>();
+        map.put("a", "b");
+        map.put("b", "c");
+        map.put("a", "c");
+        assertTrue(map.containsKey("a"));
+        assertTrue(map.containsKey("b"));
+        assertEquals("[a, b]", map.keySet().toString());
+        assertEquals("[b, c]", map.get("a").toString());
+        assertEquals("[c]", map.get("b").toString());
+        map.putAll("a", Arrays.asList("d", "e"));
+        assertEquals("[b, c, d, e]", map.get("a").toString());
+    }
+}
diff --git a/content-rdf/src/test/java/org/xbib/content/rdf/util/package-info.java b/content-rdf/src/test/java/org/xbib/content/rdf/util/package-info.java
new file mode 100644
index 0000000..6f0bc4f
--- /dev/null
+++ b/content-rdf/src/test/java/org/xbib/content/rdf/util/package-info.java
@@ -0,0 +1,4 @@
+/**
+ * Classes for testing multi maps.
+ */
+package org.xbib.content.rdf.util;
diff --git a/gradle/publish.gradle b/gradle/publish.gradle
index 9d43d7b..caf0531 100644
--- a/gradle/publish.gradle
+++ b/gradle/publish.gradle
@@ -1,5 +1,5 @@
 
-task xbibUpload(type: Upload) {
+task xbibUpload(type: Upload, dependsOn: build) {
     configuration = configurations.archives
     uploadDescriptor = true
     repositories {
@@ -14,7 +14,7 @@ task xbibUpload(type: Upload) {
     }
 }
 
-task sonatypeUpload(type: Upload) {
+task sonatypeUpload(type: Upload, dependsOn: build) {
     configuration = configurations.archives
     uploadDescriptor = true
     repositories {