diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDVisualizer.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDVisualizer.java
index c56fd5a8..7f4cc2ff 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDVisualizer.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRDVisualizer.java
@@ -148,10 +148,6 @@ public class ZUGFeRDVisualizer {
 		throws FileNotFoundException, TransformerException, IOException, SAXException, ParserConfigurationException {
 
 		try {
-			if (mXsltXRTemplate == null) {
-				mXsltXRTemplate = mFactory.newTemplates(
-					new StreamSource(CLASS_LOADER.getResourceAsStream(RESOURCE_PATH + "stylesheets/cii-xr.xsl")));
-			}
 			if (mXsltPDFTemplate == null) {
 				mXsltPDFTemplate = mFactory.newTemplates(
 					new StreamSource(CLASS_LOADER.getResourceAsStream(RESOURCE_PATH + "stylesheets/xr-pdf.xsl")));
@@ -247,6 +243,8 @@ public class ZUGFeRDVisualizer {
 
 		FileInputStream fis = new FileInputStream(xmlFilename);
 		EStandard theStandard= findOutStandardFromRootNode(fis);
+		fis = new FileInputStream(xmlFilename);//rewind :-(
+
 		try {
 			if (mXsltPDFTemplate == null) {
 				mXsltPDFTemplate = mFactory.newTemplates(
@@ -367,6 +365,11 @@ public class ZUGFeRDVisualizer {
 
 	protected void applyZF2XSLT(final InputStream xmlFile, final OutputStream HTMLOutstream)
 		throws TransformerException {
+		if (mXsltXRTemplate==null) {
+			mXsltXRTemplate = mFactory.newTemplates(
+				new StreamSource(CLASS_LOADER.getResourceAsStream(RESOURCE_PATH + "stylesheets/cii-xr.xsl")));
+
+		}
 		Transformer transformer = mXsltXRTemplate.newTransformer();
 
 		transformer.transform(new StreamSource(xmlFile), new StreamResult(HTMLOutstream));
diff --git a/library/src/main/java/org/mustangproject/util/ByteArraySearcher.java b/library/src/main/java/org/mustangproject/util/ByteArraySearcher.java
new file mode 100644
index 00000000..9fb83a64
--- /dev/null
+++ b/library/src/main/java/org/mustangproject/util/ByteArraySearcher.java
@@ -0,0 +1,56 @@
+package org.mustangproject.util;
+
+public final class ByteArraySearcher {
+
+	private ByteArraySearcher() {
+	}
+
+	public static int indexOf(byte[] haystack, byte[] needle) {
+		if (needle.length > haystack.length) {
+			return -1;
+		}
+
+		// Any needle to search?
+		if (needle.length == 0) {
+			return -1;
+		}
+
+		for (int i = 0; i <= haystack.length - needle.length; i++) {
+			boolean found = true;
+			for (int j = 0; j < needle.length; j++) {
+				if (haystack[i + j] != needle[j]) {
+					found = false;
+					break;
+				}
+			}
+			if (found) {
+				return i;
+			}
+		}
+
+		return -1;
+	}
+
+	public static boolean contains(byte[] haystack, byte[] needle) {
+		return indexOf(haystack, needle) >= 0;
+	}
+
+	public static boolean startsWith(byte[] haystack, byte[] needle) {
+		if (needle.length > haystack.length) {
+			return false;
+		}
+
+		// Any needle to search?
+		if (needle.length == 0) {
+			return false;
+		}
+
+		for (int j = 0; j < needle.length; j++) {
+			if (haystack[j] != needle[j]) {
+				return false;
+			}
+		}
+
+		return true;
+	}
+}
diff --git a/validator/src/test/java/org/mustangproject/validator/ByteArraySearcherTest.java b/library/src/test/java/org/mustangproject/ZUGFeRD/ByteArraySearcherTest.java
similarity index 96%
rename from validator/src/test/java/org/mustangproject/validator/ByteArraySearcherTest.java
rename to library/src/test/java/org/mustangproject/ZUGFeRD/ByteArraySearcherTest.java
index 9d660c67..df752f5a 100644
--- a/validator/src/test/java/org/mustangproject/validator/ByteArraySearcherTest.java
+++ b/library/src/test/java/org/mustangproject/ZUGFeRD/ByteArraySearcherTest.java
@@ -1,4 +1,4 @@
-package org.mustangproject.validator;
+package org.mustangproject.ZUGFeRD;
 
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
@@ -7,6 +7,7 @@ import static org.junit.jupiter.api.Assertions.assertEquals;
 import java.nio.charset.StandardCharsets;
 
 import org.junit.Test;
+import org.mustangproject.util.ByteArraySearcher;
 
 public class ByteArraySearcherTest
 {
diff --git a/library/src/test/java/org/mustangproject/ZUGFeRD/VisualizationTest.java b/library/src/test/java/org/mustangproject/ZUGFeRD/VisualizationTest.java
index a2ce9774..ee2c5043 100644
--- a/library/src/test/java/org/mustangproject/ZUGFeRD/VisualizationTest.java
+++ b/library/src/test/java/org/mustangproject/ZUGFeRD/VisualizationTest.java
@@ -19,8 +19,10 @@
  *********************************************************************** */
 package org.mustangproject.ZUGFeRD;
 
+import org.apache.commons.io.IOUtils;
 import org.junit.FixMethodOrder;
 import org.junit.runners.MethodSorters;
+import org.mustangproject.util.ByteArraySearcher;
 import org.xml.sax.SAXException;
 
 import javax.xml.parsers.ParserConfigurationException;
@@ -28,11 +30,13 @@ import javax.xml.transform.*;
 import java.io.*;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
+import java.nio.file.Paths;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
 public class VisualizationTest extends ResourceCase {
 
-	final String TARGET_PDF = "./target/testout-Visualization.pdf";
+	final String TARGET_PDF_CII = "./target/testout-Visualization-cii.pdf";
+	final String TARGET_PDF_UBL = "./target/testout-Visualization-cii.pdf";
 
 	public void testCIIVisualizationBasic() {
 
@@ -147,7 +151,31 @@ public class VisualizationTest extends ResourceCase {
 		assertEquals(expected, result);
 	}
 
-	public void testPDFVisualization() {
+	public void testPDFVisualizationCII() {
+
+		File CIIinputFile = getResourceAsFile("cii/01.01a-INVOICE.cii.xml");
+
+		// the writing part
+
+		String expected = null;
+		String result = null;
+		try {
+			ZUGFeRDVisualizer zvi = new ZUGFeRDVisualizer();
+			zvi.toPDF(CIIinputFile.getAbsolutePath(), TARGET_PDF_CII);
+		} catch (UnsupportedOperationException e) {
+			fail("UnsupportedOperationException should not happen: "+e.getMessage());
+		} catch (IllegalArgumentException e) {
+			fail("IllegalArgumentException should not happen: "+e.getMessage());
+		}
+
+		try {
+			assertTrue(ByteArraySearcher.startsWith(Files.readAllBytes(Paths.get(TARGET_PDF_CII)), new byte[]{'%', 'P', 'D', 'F'}));
+		} catch (IOException e) {
+			fail("IOException should not occur");
+		}
+	}
+
+	public void testPDFVisualizationUBL() {
 
 		File UBLinputFile = getResourceAsFile("ubl/01.01a-INVOICE.ubl.xml");
 
@@ -158,16 +186,19 @@ public class VisualizationTest extends ResourceCase {
 		String result = null;
 		try {
 			ZUGFeRDVisualizer zvi = new ZUGFeRDVisualizer();
-			zvi.toPDF(UBLinputFile.getAbsolutePath(), TARGET_PDF);
+			zvi.toPDF(UBLinputFile.getAbsolutePath(), TARGET_PDF_UBL);
 		} catch (UnsupportedOperationException e) {
 			fail("UnsupportedOperationException should not happen: "+e.getMessage());
 		} catch (IllegalArgumentException e) {
 			fail("IllegalArgumentException should not happen: "+e.getMessage());
 		}
 
-//		assertNotNull(result);
-		// Reading ZUGFeRD
-//		assertEquals(expected, result);
+
+		try {
+			assertTrue(ByteArraySearcher.startsWith(Files.readAllBytes(Paths.get(TARGET_PDF_CII)), new byte[]{'%', 'P', 'D', 'F'}));
+		} catch (IOException e) {
+			fail("IOException should not occur");
+		}
 	}
 
 }
diff --git a/validator/src/main/java/org/mustangproject/validator/ByteArraySearcher.java b/validator/src/main/java/org/mustangproject/validator/ByteArraySearcher.java
deleted file mode 100644
index 2cfc1514..00000000
--- a/validator/src/main/java/org/mustangproject/validator/ByteArraySearcher.java
+++ /dev/null
@@ -1,56 +0,0 @@
-package org.mustangproject.validator;
-
-public final class ByteArraySearcher {
-
-	private ByteArraySearcher() {
-	}
-
-  public static int indexOf(byte[] haystack, byte[] needle) {
-    if (needle.length > haystack.length) {
-      return -1;
-    }
-    
-    // Any needle to search?
-    if (needle.length == 0) {
-      return -1;
-    }
-
-    for (int i = 0; i <= haystack.length - needle.length; i++) {
-      boolean found = true;
-      for (int j = 0; j < needle.length; j++) {
-        if (haystack[i + j] != needle[j]) {
-          found = false;
-          break;
-        }
-      }
-      if (found) {
-        return i;
-      }
-    }
-
-    return -1;
-  }
-
-	public static boolean contains(byte[] haystack, byte[] needle) {
-	  return indexOf (haystack, needle) >= 0;
-	}
-
-  public static boolean startsWith(byte[] haystack, byte[] needle) {
-    if (needle.length > haystack.length) {
-      return false;
-    }
-    
-    // Any needle to search?
-    if (needle.length == 0) {
-      return false;
-    }
-
-    for (int j = 0; j < needle.length; j++) {
-      if (haystack[j] != needle[j]) {
-        return false;
-      }
-    }
-    
-    return true;
-  }
-}
diff --git a/validator/src/main/java/org/mustangproject/validator/PDFValidator.java b/validator/src/main/java/org/mustangproject/validator/PDFValidator.java
index e0d3ac00..da719f9b 100644
--- a/validator/src/main/java/org/mustangproject/validator/PDFValidator.java
+++ b/validator/src/main/java/org/mustangproject/validator/PDFValidator.java
@@ -21,6 +21,7 @@ import javax.xml.xpath.XPathExpression;
 import javax.xml.xpath.XPathExpressionException;
 import javax.xml.xpath.XPathFactory;
 
+import org.mustangproject.util.ByteArraySearcher;
 import org.mustangproject.ZUGFeRD.ZUGFeRDImporter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
diff --git a/validator/src/main/java/org/mustangproject/validator/ZUGFeRDValidator.java b/validator/src/main/java/org/mustangproject/validator/ZUGFeRDValidator.java
index 119a47b0..edd9a73d 100644
--- a/validator/src/main/java/org/mustangproject/validator/ZUGFeRDValidator.java
+++ b/validator/src/main/java/org/mustangproject/validator/ZUGFeRDValidator.java
@@ -25,6 +25,7 @@ import org.dom4j.DocumentException;
 import org.dom4j.DocumentHelper;
 import org.dom4j.io.OutputFormat;
 import org.dom4j.io.XMLWriter;
+import org.mustangproject.util.ByteArraySearcher;
 import org.mustangproject.XMLTools;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;