diff --git a/History.md b/History.md
index 97088002..789221f7 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,9 @@
+2.1.0
+=======
+
+
+- Corrected intra community supply tax exemption category code
+
 2.0.3
 =======
 2020-12-06
diff --git a/Mustang-CLI/pom.xml b/Mustang-CLI/pom.xml
index 274d1f1c..c7f94c3d 100644
--- a/Mustang-CLI/pom.xml
+++ b/Mustang-CLI/pom.xml
@@ -8,7 +8,7 @@
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.mustangproject</groupId>
    <artifactId>Mustang-CLI</artifactId>
-   <name>Mustang commandline tool</name>
+   <name>e-invoices commandline tool, allowing to create(embed), split and validate Factur-X/ZUGFeRD files. Validation should also work for XRechnung/CII. </name>
    <packaging>jar</packaging>
    <version>2.0.4-SNAPSHOT</version>
    <repositories>
@@ -53,7 +53,6 @@
          <version>4.13.1</version>
          <scope>test</scope>
       </dependency>
-
 <!-- for directory validation: -->
       <dependency>
          <groupId>org.xmlunit</groupId>
diff --git a/library/pom.xml b/library/pom.xml
index d1c0b4bf..6686b648 100644
--- a/library/pom.xml
+++ b/library/pom.xml
@@ -11,8 +11,8 @@
 	<artifactId>library</artifactId>
 	<version>2.0.4-SNAPSHOT</version>
 	<packaging>jar</packaging>
-	<name>Library to write and read FacturX and ZUGFeRD e-invoices.  </name>
-	<description>The Mustang project is a java library to read and write ZUGFeRD meta data inside your invoice PDFs. To write files, a provided PDF/A will be combined with generated or provided XML.
+	<name>Library to write, read and validate e-invoices (Factur-X, ZUGFeRD and to a limited extend XRechnung/CII).  </name>
+	<description>The Mustang project is a java library to read, write and validate Factur-X/ZUGFeRD meta data inside your invoice PDFs. To write files, a provided PDF/A will be combined with generated or provided XML.
     </description>
 	<url>http://www.mustangproject.org/</url>
 	<scm>
@@ -83,6 +83,14 @@
 			<version>4.13.1</version>
 			<scope>test</scope>
 		</dependency>
+
+		<!-- CII to UBL conversion -->
+		<dependency>
+			<groupId>com.helger</groupId>
+			<artifactId>en16931-cii2ubl</artifactId>
+			<version>1.2.5</version>
+		</dependency>
+
 		<dependency>
 			<groupId>com.helger</groupId>
 			<artifactId>ph-schematron</artifactId>
@@ -101,6 +109,12 @@
 			<artifactId>xmlunit-assertj</artifactId>
 			<version>2.6.3</version>
 		</dependency>
+		<dependency>
+			<groupId>com.helger</groupId>
+			<artifactId>ph-commons</artifactId>
+			<version>9.1.1</version>
+			<scope>compile</scope>
+		</dependency>
 
 	</dependencies>
 	<build>
diff --git a/library/src/main/java/org/mustangproject/CII/CIIToUBL.java b/library/src/main/java/org/mustangproject/CII/CIIToUBL.java
new file mode 100644
index 00000000..8b2a28e3
--- /dev/null
+++ b/library/src/main/java/org/mustangproject/CII/CIIToUBL.java
@@ -0,0 +1,50 @@
+package org.mustangproject.CII;
+import com.helger.commons.error.list.ErrorList;
+import com.helger.en16931.cii2ubl.CIIToUBL22Converter;
+import com.helger.ubl21.UBL21Writer;
+import com.helger.ubl22.UBL22Writer;
+
+import java.io.File;
+import java.io.Serializable;
+
+public class CIIToUBL {
+	/***
+	 * converts a CII XML file to a UBL XML file
+	 * thanks to Philip Helger for his library
+	 * @param input
+	 * @param output
+	 */
+   public void convert(File input, File output) {
+	   ErrorList occurred=new ErrorList();
+	   CIIToUBL22Converter cc=new CIIToUBL22Converter();
+	   Serializable aUBL = cc.convertCIItoUBL(input, occurred);
+	   if (aUBL instanceof oasis.names.specification.ubl.schema.xsd.invoice_21.InvoiceType)
+	   {
+		   UBL21Writer.invoice ()
+				   .setFormattedOutput (true)
+				   .write ((oasis.names.specification.ubl.schema.xsd.invoice_21.InvoiceType) aUBL, output);
+	   }
+	   else
+	   if (aUBL instanceof oasis.names.specification.ubl.schema.xsd.creditnote_21.CreditNoteType)
+	   {
+		   UBL21Writer.creditNote ()
+				   .setFormattedOutput (true)
+				   .write ((oasis.names.specification.ubl.schema.xsd.creditnote_21.CreditNoteType) aUBL, output);
+	   }
+	   else
+	   if (aUBL instanceof oasis.names.specification.ubl.schema.xsd.invoice_22.InvoiceType)
+	   {
+		   UBL22Writer.invoice ()
+				   .setFormattedOutput (true)
+				   .write ((oasis.names.specification.ubl.schema.xsd.invoice_22.InvoiceType) aUBL, output);
+	   }
+	   else
+	   if (aUBL instanceof oasis.names.specification.ubl.schema.xsd.creditnote_22.CreditNoteType)
+	   {
+		   UBL22Writer.creditNote ()
+				   .setFormattedOutput (true)
+				   .write ((oasis.names.specification.ubl.schema.xsd.creditnote_22.CreditNoteType) aUBL, output);
+	   }
+   }
+
+}
diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/model/TaxCategoryCodeTypeConstants.java b/library/src/main/java/org/mustangproject/ZUGFeRD/model/TaxCategoryCodeTypeConstants.java
index 979207c8..b7669ba0 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/model/TaxCategoryCodeTypeConstants.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/model/TaxCategoryCodeTypeConstants.java
@@ -24,5 +24,5 @@ public class TaxCategoryCodeTypeConstants {
 	public static final String TAXEXEMPT = "E";
 	public static final String ZEROTAXPRODUCTS = "Z";
 	public static final String UNTAXEDSERVICE = "O";
-	public static final String INTRACOMMUNITY = "IC";
+	public static final String INTRACOMMUNITY = "K";
 }