diff --git a/content-rdf/src/main/java/org/xbib/content/rdf/RdfXContentGenerator.java b/content-rdf/src/main/java/org/xbib/content/rdf/RdfXContentGenerator.java
index 3d752d2..2e5548a 100644
--- a/content-rdf/src/main/java/org/xbib/content/rdf/RdfXContentGenerator.java
+++ b/content-rdf/src/main/java/org/xbib/content/rdf/RdfXContentGenerator.java
@@ -55,7 +55,7 @@ public class RdfXContentGenerator<P extends RdfXContentParams> implements RdfCon
 
     @Override
     public RdfContentGenerator<P> setBaseUri(String baseUri) {
-        startPrefixMapping("", baseUri);
+        params.getNamespaceContext().addNamespace("", baseUri);
         return this;
     }
 
@@ -92,8 +92,11 @@ public class RdfXContentGenerator<P extends RdfXContentParams> implements RdfCon
     }
 
     @Override
-    public void close() throws IOException {
-        flush();
+    public RdfXContentGenerator<P> receive(Resource resource) throws IOException {
+        if (resource != null) {
+            this.resource = resource;
+        }
+        return this;
     }
 
     @Override
@@ -102,7 +105,6 @@ public class RdfXContentGenerator<P extends RdfXContentParams> implements RdfCon
             return;
         }
         flushed = true;
-        // JSON output
         builder = DefaultXContentBuilder.builder(JsonXContent.jsonContent(), out);
         builder.startObject();
         build(this.resource);
@@ -110,12 +112,8 @@ public class RdfXContentGenerator<P extends RdfXContentParams> implements RdfCon
     }
 
     @Override
-    public RdfXContentGenerator<P> receive(Resource resource) throws IOException {
-        if (resource != null) {
-            this.resource = resource;
-        }
+    public void close() throws IOException {
         flush();
-        return this;
     }
 
     public String string() throws IOException {
diff --git a/content-rdf/src/main/java/org/xbib/content/rdf/RouteRdfXContent.java b/content-rdf/src/main/java/org/xbib/content/rdf/RouteRdfXContent.java
index b9ca2e8..76fc1a0 100644
--- a/content-rdf/src/main/java/org/xbib/content/rdf/RouteRdfXContent.java
+++ b/content-rdf/src/main/java/org/xbib/content/rdf/RouteRdfXContent.java
@@ -28,12 +28,12 @@ public class RouteRdfXContent implements RdfContent<RouteRdfXContentParams> {
     }
 
     @Override
-    public RdfContentGenerator<RouteRdfXContentParams> createGenerator(OutputStream out) throws IOException {
+    public RdfContentGenerator<RouteRdfXContentParams> createGenerator(OutputStream out) {
         return new RouteRdfXContentGenerator<>(out);
     }
 
     @Override
-    public RdfContentParser<RouteRdfXContentParams> createParser(InputStream in) throws IOException {
+    public RdfContentParser<RouteRdfXContentParams> createParser(InputStream in) {
         throw new UnsupportedOperationException();
     }
 
diff --git a/content-rdf/src/main/java/org/xbib/content/rdf/RouteRdfXContentGenerator.java b/content-rdf/src/main/java/org/xbib/content/rdf/RouteRdfXContentGenerator.java
index efcf7c4..de0d9e7 100644
--- a/content-rdf/src/main/java/org/xbib/content/rdf/RouteRdfXContentGenerator.java
+++ b/content-rdf/src/main/java/org/xbib/content/rdf/RouteRdfXContentGenerator.java
@@ -13,7 +13,7 @@ public class RouteRdfXContentGenerator<R extends RouteRdfXContentParams> extends
 
     private boolean flushed;
 
-    RouteRdfXContentGenerator(OutputStream out) throws IOException {
+    RouteRdfXContentGenerator(OutputStream out) {
         super(out);
     }
 
@@ -65,5 +65,4 @@ public class RouteRdfXContentGenerator<R extends RouteRdfXContentParams> extends
             getParams().setId(object.toString());
         }
     }
-
 }
diff --git a/content-rdf/src/main/java/org/xbib/content/rdf/io/json/JsonContentGenerator.java b/content-rdf/src/main/java/org/xbib/content/rdf/io/json/JsonContentGenerator.java
index 5b8e840..9fc1fed 100644
--- a/content-rdf/src/main/java/org/xbib/content/rdf/io/json/JsonContentGenerator.java
+++ b/content-rdf/src/main/java/org/xbib/content/rdf/io/json/JsonContentGenerator.java
@@ -16,9 +16,6 @@ import java.io.Writer;
 import java.nio.charset.StandardCharsets;
 import java.util.Map;
 
-/**
- *
- */
 public class JsonContentGenerator implements RdfContentGenerator<JsonContentParams>, Flushable {
 
     private final Writer writer;
@@ -29,11 +26,11 @@ public class JsonContentGenerator implements RdfContentGenerator<JsonContentPara
 
     private JsonContentParams params = JsonContentParams.JSON_CONTENT_PARAMS;
 
-    JsonContentGenerator(OutputStream out) throws IOException {
+    JsonContentGenerator(OutputStream out) {
         this(new OutputStreamWriter(out, StandardCharsets.UTF_8));
     }
 
-    JsonContentGenerator(Writer writer) throws IOException {
+    JsonContentGenerator(Writer writer) {
         this.writer = writer;
         this.nsWritten = false;
         this.resource = new DefaultAnonymousResource();
@@ -44,10 +41,20 @@ public class JsonContentGenerator implements RdfContentGenerator<JsonContentPara
         return params;
     }
 
+    @Override
+    public JsonContentGenerator receive(Resource resource) throws IOException {
+        this.resource = resource;
+        return this;
+    }
+
+    @Override
+    public void flush() throws IOException {
+        writer.flush();
+    }
+
     @Override
     public void close() throws IOException {
-        // write last resource
-        receive(resource);
+        writer.close();
     }
 
     @Override
@@ -98,8 +105,7 @@ public class JsonContentGenerator implements RdfContentGenerator<JsonContentPara
         return this;
     }
 
-    private JsonContentGenerator writeNamespaces() throws IOException {
-        nsWritten = false;
+    private void writeNamespaces() {
         for (Map.Entry<String, String> entry : params.getNamespaceContext().getNamespaces().entrySet()) {
             if (entry.getValue().length() > 0) {
                 String nsURI = entry.getValue();
@@ -108,16 +114,5 @@ public class JsonContentGenerator implements RdfContentGenerator<JsonContentPara
                 }
             }
         }
-        return this;
-    }
-
-    @Override
-    public void flush() throws IOException {
-        writer.flush();
-    }
-
-    @Override
-    public JsonContentGenerator receive(Resource resource) throws IOException {
-        return this;
     }
 }
diff --git a/content-rdf/src/main/java/org/xbib/content/rdf/io/rdfxml/RdfXmlContentGenerator.java b/content-rdf/src/main/java/org/xbib/content/rdf/io/rdfxml/RdfXmlContentGenerator.java
index 55f15e8..b3a067a 100644
--- a/content-rdf/src/main/java/org/xbib/content/rdf/io/rdfxml/RdfXmlContentGenerator.java
+++ b/content-rdf/src/main/java/org/xbib/content/rdf/io/rdfxml/RdfXmlContentGenerator.java
@@ -40,15 +40,21 @@ public class RdfXmlContentGenerator implements RdfContentGenerator<RdfXmlContent
         this(new OutputStreamWriter(out, StandardCharsets.UTF_8));
     }
 
-    public RdfXmlContentGenerator(Writer writer) throws IOException {
+    public RdfXmlContentGenerator(Writer writer) {
         this.writer = writer;
         this.resource = new DefaultAnonymousResource();
     }
 
+
+    @Override
+    public void flush() throws IOException {
+        writer.flush();
+    }
+
     @Override
     public void close() throws IOException {
-        // write last resource
-        receive(resource);
+        flush();
+        writer.close();
     }
 
     @Override
@@ -78,7 +84,7 @@ public class RdfXmlContentGenerator implements RdfContentGenerator<RdfXmlContent
 
     @Override
     public RdfContentGenerator<RdfXmlContentParams> setBaseUri(String baseUri) {
-        startPrefixMapping("", baseUri);
+        params.getNamespaceContext().addNamespace("", baseUri);
         return this;
     }
 
@@ -111,7 +117,7 @@ public class RdfXmlContentGenerator implements RdfContentGenerator<RdfXmlContent
         this.headerWritten = false;
         this.lastWrittenSubject = null;
         for (Map.Entry<String, String> entry : params.getNamespaceContext().getNamespaces().entrySet()) {
-            handleNamespace(entry.getKey(), entry.getValue());
+            setNamespace(entry.getKey(), entry.getValue());
         }
         startRDF();
         writeHeader();
@@ -122,11 +128,6 @@ public class RdfXmlContentGenerator implements RdfContentGenerator<RdfXmlContent
         return this;
     }
 
-    @Override
-    public void flush() throws IOException {
-        writer.flush();
-    }
-
     private void startRDF() throws IOException {
         if (writingStarted) {
             throw new IOException("writing has already started");
@@ -136,7 +137,7 @@ public class RdfXmlContentGenerator implements RdfContentGenerator<RdfXmlContent
 
     private void writeHeader() throws IOException {
         try {
-            setNamespace("rdf", NS_URI, false);
+            setNamespace("rdf", NS_URI);
             writer.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
             writeStartOfStartTag(NS_URI, "RDF");
             for (Map.Entry<String, String> entry : params.getNamespaceContext().getNamespaces().entrySet()) {
@@ -178,11 +179,7 @@ public class RdfXmlContentGenerator implements RdfContentGenerator<RdfXmlContent
         }
     }
 
-    private void handleNamespace(String prefix, String name) {
-        setNamespace(prefix, name, false);
-    }
-
-    private void setNamespace(String prefix, String name, boolean fixedPrefix) {
+    private void setNamespace(String prefix, String name) {
         if (headerWritten) {
             return;
         }
@@ -191,13 +188,6 @@ public class RdfXmlContentGenerator implements RdfContentGenerator<RdfXmlContent
             String p = prefix;
             boolean isLegalPrefix = p.length() == 0 || XMLUtil.isNCName(p);
             if (!isLegalPrefix || map.containsValue(p)) {
-                if (fixedPrefix) {
-                    if (isLegalPrefix) {
-                        throw new IllegalArgumentException("Prefix is already in use: " + prefix);
-                    } else {
-                        throw new IllegalArgumentException("Prefix is not a valid XML namespace prefix: " + prefix);
-                    }
-                }
                 if (p.length() == 0 || !isLegalPrefix) {
                     p = "ns";
                 }
@@ -211,7 +201,7 @@ public class RdfXmlContentGenerator implements RdfContentGenerator<RdfXmlContent
         }
     }
 
-    private RdfXmlContentGenerator writeTriple(Triple triple) throws IOException {
+    private void writeTriple(Triple triple) throws IOException {
         if (!writingStarted) {
             throw new IOException("document writing has not yet been started");
         }
@@ -275,7 +265,6 @@ public class RdfXmlContentGenerator implements RdfContentGenerator<RdfXmlContent
             writeEndTag(predNamespace, predLocalName);
         }
         writeNewLine();
-        return this;
     }
 
     private void flushPendingStatements() throws IOException {
@@ -389,7 +378,7 @@ public class RdfXmlContentGenerator implements RdfContentGenerator<RdfXmlContent
         StringBuilder buf = new StringBuilder(text.length());
         int prevIndex = 0;
         while (oldsIndex >= 0) {
-            buf.append(text.substring(prevIndex, oldsIndex));
+            buf.append(text, prevIndex, oldsIndex);
             buf.append(news);
             prevIndex = oldsIndex + olds.length();
             oldsIndex = text.indexOf(olds, prevIndex);
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 4fcd802..0c1e541 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
@@ -69,14 +69,22 @@ public class RdfXmlContentParser<R extends RdfContentParams> implements RdfConst
     // counter for blank node generation
     private int bn = 0;
 
-    public RdfXmlContentParser(InputStream in) {
-        this(new InputStreamReader(in, StandardCharsets.UTF_8));
+    public RdfXmlContentParser(InputStream inputStream) {
+        this(createReader(inputStream));
     }
 
     public RdfXmlContentParser(Reader reader) {
         this.reader = reader;
     }
 
+    private static Reader createReader(InputStream inputStream) {
+        if (inputStream != null) {
+            return new InputStreamReader(inputStream, StandardCharsets.UTF_8);
+        } else {
+            return null;
+        }
+    }
+
     @Override
     public RdfContentType contentType() {
         return StandardRdfContentType.RDFXML;
diff --git a/content-rdf/src/test/java/org/xbib/content/rdf/RdfXContentGeneratorTest.java b/content-rdf/src/test/java/org/xbib/content/rdf/RdfXContentGeneratorTest.java
index d325a63..f4d171b 100644
--- a/content-rdf/src/test/java/org/xbib/content/rdf/RdfXContentGeneratorTest.java
+++ b/content-rdf/src/test/java/org/xbib/content/rdf/RdfXContentGeneratorTest.java
@@ -22,8 +22,9 @@ public class RdfXContentGeneratorTest {
                 .add("urn:date", l)
                 .add("urn:link", IRI.create("urn:pointer"));
         RdfXContentParams params = new RdfXContentParams();
-        RdfContentBuilder<RdfXContentParams> builder = rdfXContentBuilder(params);
-        builder.receive(resource);
+        try (RdfContentBuilder<RdfXContentParams> builder = rdfXContentBuilder(params)) {
+            builder.receive(resource);
+        }
         String result = params.getGenerator().get();
         assertEquals(result,
                 "{\"urn:property\":\"Hello World\",\"urn:date\":2013,\"urn:link\":\"urn:pointer\"}");
@@ -40,8 +41,9 @@ public class RdfXContentGeneratorTest {
                 .newResource("urn:embedded")
                 .add("rdf:type", IRI.create("urn:type2"));
         RdfXContentParams params = new RdfXContentParams();
-        RdfContentBuilder<RdfXContentParams> builder = rdfXContentBuilder(params);
-        builder.receive(resource);
+        try (RdfContentBuilder<RdfXContentParams> builder = rdfXContentBuilder(params)) {
+            builder.receive(resource);
+        }
         String result = params.getGenerator().get();
         assertEquals("{\"urn:property\":\"Hello World\",\"urn:date\":2013,\"rdf:type\":\"urn:type1\","
                 + "\"urn:embedded\":{\"rdf:type\":\"urn:type2\"}}", result);
@@ -60,8 +62,9 @@ public class RdfXContentGeneratorTest {
         resource.newResource("urn:embedded2")
                 .add("rdf:type", IRI.create("urn:type3"));
         RdfXContentParams params = new RdfXContentParams();
-        RdfContentBuilder<RdfXContentParams> builder = rdfXContentBuilder(params);
-        builder.receive(resource);
+        try (RdfContentBuilder<RdfXContentParams> builder = rdfXContentBuilder(params)) {
+            builder.receive(resource);
+        }
         String result = params.getGenerator().get();
         assertEquals("{\"urn:property\":\"Hello World\",\"urn:date\":2013,\"rdf:type\":\"urn:type1\","
                 + "\"urn:embedded\":{\"rdf:type\":\"urn:type2\"},\"urn:embedded2\":{\"rdf:type\":\"urn:type3\"}}", result);
@@ -77,8 +80,9 @@ public class RdfXContentGeneratorTest {
                 .add("rdf:type", IRI.create("urn:type1"))
                 .newResource("urn:embedded"); // empty resource, do not copy
         RdfXContentParams params = new RdfXContentParams();
-        RdfContentBuilder<RdfXContentParams> builder = rdfXContentBuilder(params);
-        builder.receive(resource);
+        try (RdfContentBuilder<RdfXContentParams> builder = rdfXContentBuilder(params)) {
+            builder.receive(resource);
+        }
         String result = params.getGenerator().get();
         assertEquals(result,
                 "{\"urn:property\":\"Hello World\",\"urn:date\":2013,\"rdf:type\":\"urn:type1\"}");
diff --git a/content-rdf/src/test/java/org/xbib/content/rdf/RouteRdfXContentBuilderTest.java b/content-rdf/src/test/java/org/xbib/content/rdf/RouteRdfXContentBuilderTest.java
index 5624609..67c4e1b 100644
--- a/content-rdf/src/test/java/org/xbib/content/rdf/RouteRdfXContentBuilderTest.java
+++ b/content-rdf/src/test/java/org/xbib/content/rdf/RouteRdfXContentBuilderTest.java
@@ -1,9 +1,15 @@
 package org.xbib.content.rdf;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.xbib.content.rdf.RdfXContentFactory.routeRdfXContentBuilder;
 import static org.xbib.content.rdf.StreamTester.assertStream;
 
+import java.text.MessageFormat;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import org.junit.jupiter.api.Test;
 import org.xbib.content.rdf.internal.DefaultLiteral;
 import org.xbib.content.rdf.internal.DefaultResource;
@@ -15,6 +21,8 @@ import java.io.InputStream;
 
 public class RouteRdfXContentBuilderTest {
 
+    private static final Logger logger = Logger.getLogger(RouteRdfXContentBuilderTest.class.getName());
+
     @Test
     public void testRoute() throws Exception {
         Resource resource = new DefaultResource(IRI.create("urn:res"));
@@ -24,11 +32,16 @@ public class RouteRdfXContentBuilderTest {
                 .add("urn:date", l)
                 .add("urn:link", IRI.create("urn:pointer"));
         RouteRdfXContentParams params = new RouteRdfXContentParams("index", "type");
-        params.setHandler((content, p) -> assertEquals(p.getIndex() + " " + p.getType() + " 1 " + content,
-                "index type 1 {\"urn:property\":\"Hello World\",\"urn:date\":2013,\"urn:link\":\"urn:pointer\"}"
-        ));
-        RdfContentBuilder<RouteRdfXContentParams> builder = routeRdfXContentBuilder(params);
-        builder.receive(resource);
+        AtomicBoolean found = new AtomicBoolean();
+        params.setHandler((content, p) -> {
+            assertEquals(p.getIndex() + " " + p.getType() + " 1 " + content,
+                    "index type 1 {\"urn:property\":\"Hello World\",\"urn:date\":2013,\"urn:link\":\"urn:pointer\"}");
+            found.set(true);
+        });
+        try (RdfContentBuilder<RouteRdfXContentParams> builder = routeRdfXContentBuilder(params)) {
+            builder.receive(resource);
+        }
+        assertTrue(found.get());
     }
 
     @Test
@@ -39,8 +52,11 @@ public class RouteRdfXContentBuilderTest {
         }
         StringBuilder sb = new StringBuilder();
         RouteRdfXContentParams params = new RouteRdfXContentParams("index", "type");
+        AtomicInteger counter = new AtomicInteger();
         params.setHandler((content, p) -> {
-            //logger.info("handle: {} {} {} {}", p.getIndex(), p.getType(), p.getId(), content);
+            logger.log(Level.INFO, MessageFormat.format("handle: {0} {1} {2} {3}",
+                    p.getIndex(), p.getType(), p.getId(), content));
+            counter.incrementAndGet();
         });
         new RdfXmlContentParser<RouteRdfXContentParams>(in)
                 .setRdfContentBuilderProvider(() -> routeRdfXContentBuilder(params))
@@ -53,5 +69,6 @@ public class RouteRdfXContentBuilderTest {
                 .parse();
         assertStream("viaf.json", getClass().getResourceAsStream("viaf.json"),
                 sb.toString());
+        assertEquals(5, counter.get());
     }
 }
diff --git a/content-rdf/src/test/java/org/xbib/content/rdf/io/json/JsonReaderTest.java b/content-rdf/src/test/java/org/xbib/content/rdf/io/json/JsonReaderTest.java
index 76daeb3..dd53abb 100644
--- a/content-rdf/src/test/java/org/xbib/content/rdf/io/json/JsonReaderTest.java
+++ b/content-rdf/src/test/java/org/xbib/content/rdf/io/json/JsonReaderTest.java
@@ -27,14 +27,12 @@ public class JsonReaderTest extends StreamTester {
         if (in == null) {
             throw new IOException("file " + filename + " not found");
         }
-
         IRINamespaceContext namespaceContext = IRINamespaceContext.newInstance();
         namespaceContext.addNamespace("dc", "http://purl.org/dc/elements/1.1/");
         namespaceContext.addNamespace("dcterms", "http://purl.org/dc/terms/");
         namespaceContext.addNamespace("bib", "info:srw/cql-context-set/1/bib-v1/");
         namespaceContext.addNamespace("xbib", "http://xbib.org/");
         namespaceContext.addNamespace("lia", "http://xbib.org/lia/");
-
         JsonContentParams params = new JsonContentParams(namespaceContext);
         JsonResourceHandler jsonHandler = new JsonResourceHandler(params) {
 
diff --git a/content-rdf/src/test/java/org/xbib/content/rdf/io/ntriple/NTripleReaderTest.java b/content-rdf/src/test/java/org/xbib/content/rdf/io/ntriple/NTripleReaderTest.java
index faf37ec..1976079 100644
--- a/content-rdf/src/test/java/org/xbib/content/rdf/io/ntriple/NTripleReaderTest.java
+++ b/content-rdf/src/test/java/org/xbib/content/rdf/io/ntriple/NTripleReaderTest.java
@@ -9,9 +9,6 @@ import org.xbib.content.rdf.StreamTester;
 import java.io.IOException;
 import java.io.InputStream;
 
-/**
- *
- */
 public class NTripleReaderTest extends StreamTester {
 
     @Test
@@ -25,8 +22,8 @@ public class NTripleReaderTest extends StreamTester {
         NTripleContentParser<NTripleContentParams> reader = new NTripleContentParser<>(in);
         reader.setBuilder(builder);
         reader.parse();
-        //assertStream(getClass().getResource("rdfxml.ttl").openStream(),
-        //        builder.streamInput());
+        assertStream("", getClass().getResource("rdfxml.ttl").openStream(),
+                builder.streamInput());
     }
 
 }
diff --git a/content-rdf/src/test/resources/org/xbib/content/rdf/io/ntriple/rdfxml.ttl b/content-rdf/src/test/resources/org/xbib/content/rdf/io/ntriple/rdfxml.ttl
new file mode 100644
index 0000000..562b132
--- /dev/null
+++ b/content-rdf/src/test/resources/org/xbib/content/rdf/io/ntriple/rdfxml.ttl
@@ -0,0 +1,78 @@
+<http://id.loc.gov/authorities/sh85068030> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#ComplexSubject> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#authoritativeLabel> "Nobility--Ireland"@en .
+_:genid1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> <http://id.loc.gov/authorities/sh85092138> .
+<http://id.loc.gov/authorities/sh85092138> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Topic> .
+_:genid2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> <http://id.loc.gov/authorities/sh85067964> .
+_:genid1 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:genid2 .
+<http://id.loc.gov/authorities/sh85067964> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Geographic> .
+_:genid2 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#componentList> _:genid1 .
+_:genid3 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#ComplexSubject> .
+_:genid3 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Variant> .
+_:genid3 <http://www.loc.gov/mads/rdf/v1#variantLabel> "Ireland--Nobility"@en .
+_:genid5 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:genid4 .
+_:genid4 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Geographic> .
+_:genid4 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Variant> .
+_:genid4 <http://www.loc.gov/mads/rdf/v1#variantLabel> "Ireland"@en .
+_:genid7 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:genid6 .
+_:genid6 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#GeographicElement> .
+_:genid6 <http://www.loc.gov/mads/rdf/v1#elementValue> "Ireland" .
+_:genid7 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
+_:genid4 <http://www.loc.gov/mads/rdf/v1#elementList> _:genid7 .
+_:genid9 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:genid8 .
+_:genid5 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:genid9 .
+_:genid8 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Topic> .
+_:genid8 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Variant> .
+_:genid8 <http://www.loc.gov/mads/rdf/v1#variantLabel> "Nobility"@en .
+_:genid11 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:genid10 .
+_:genid10 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#TopicElement> .
+_:genid10 <http://www.loc.gov/mads/rdf/v1#elementValue> "Nobility" .
+_:genid11 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
+_:genid8 <http://www.loc.gov/mads/rdf/v1#elementList> _:genid11 .
+_:genid9 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
+_:genid3 <http://www.loc.gov/mads/rdf/v1#componentList> _:genid5 .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#hasVariant> _:genid3 .
+_:genid12 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#ComplexSubject> .
+_:genid12 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Variant> .
+_:genid12 <http://www.loc.gov/mads/rdf/v1#variantLabel> "Ireland--Peerage"@en .
+_:genid14 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:genid13 .
+_:genid13 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Geographic> .
+_:genid13 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Variant> .
+_:genid13 <http://www.loc.gov/mads/rdf/v1#variantLabel> "Ireland"@en .
+_:genid16 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:genid15 .
+_:genid15 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#GeographicElement> .
+_:genid15 <http://www.loc.gov/mads/rdf/v1#elementValue> "Ireland" .
+_:genid16 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
+_:genid13 <http://www.loc.gov/mads/rdf/v1#elementList> _:genid16 .
+_:genid18 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:genid17 .
+_:genid14 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:genid18 .
+_:genid17 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Topic> .
+_:genid17 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Variant> .
+_:genid17 <http://www.loc.gov/mads/rdf/v1#variantLabel> "Peerage"@en .
+_:genid20 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:genid19 .
+_:genid19 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#TopicElement> .
+_:genid19 <http://www.loc.gov/mads/rdf/v1#elementValue> "Peerage" .
+_:genid20 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
+_:genid17 <http://www.loc.gov/mads/rdf/v1#elementList> _:genid20 .
+_:genid18 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
+_:genid12 <http://www.loc.gov/mads/rdf/v1#componentList> _:genid14 .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#hasVariant> _:genid12 .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#hasEarlierEstablishedForm> <http://id.loc.gov/authorities/sh85068030> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#hasEarlierEstablishedForm> <http://id.loc.gov/authorities/sh85068030> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/sh85075905> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#isMemberOfMADSCollection> <http://id.loc.gov/authorities/collection_AuthorizedHeadings> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#isMemberOfMADSScheme> <http://id.loc.gov/authorities/lcsh> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#isMemberOfMADSCollection> <http://id.loc.gov/authorities/collection_LCSH_General> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.w3.org/2002/07/owl#sameAs> <info:lc/authorities/sh85068030> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.w3.org/2002/07/owl#sameAs> <http://id.loc.gov/authorities/sh85068030#concept> .
+_:genid21 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://id.loc.gov/ontologies/RecordInfo#RecordInfo> .
+_:genid21 <http://id.loc.gov/ontologies/RecordInfo#recordChangeDate> "1986-02-11T00:00:00" .
+_:genid21 <http://id.loc.gov/ontologies/RecordInfo#recordStatus> "new" .
+_:genid21 <http://id.loc.gov/ontologies/RecordInfo#recordContentSource> <http://id.loc.gov/vocabulary/organizations/dlc> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#adminMetadata> _:genid21 .
+_:genid22 <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://id.loc.gov/ontologies/RecordInfo#RecordInfo> .
+_:genid22 <http://id.loc.gov/ontologies/RecordInfo#recordChangeDate> "2000-10-02T10:44:24" .
+_:genid22 <http://id.loc.gov/ontologies/RecordInfo#recordStatus> "revised" .
+_:genid22 <http://id.loc.gov/ontologies/RecordInfo#recordContentSource> <http://id.loc.gov/vocabulary/organizations/dlc> .
+<http://id.loc.gov/authorities/sh85068030> <http://www.loc.gov/mads/rdf/v1#adminMetadata> _:genid22 .
diff --git a/gradle.properties b/gradle.properties
index f73deb7..a11dddf 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 group = org.xbib
 name = content
-version = 5.0.1
+version = 5.0.2
 
 org.gradle.warning.mode = ALL