diff --git a/src/main/java/org/mustangproject/ZUGFeRD/model/DocumentContextParameterTypeConstants.java b/src/main/java/org/mustangproject/ZUGFeRD/model/DocumentContextParameterTypeConstants.java
index 57033f6d..d90eabd1 100644
--- a/src/main/java/org/mustangproject/ZUGFeRD/model/DocumentContextParameterTypeConstants.java
+++ b/src/main/java/org/mustangproject/ZUGFeRD/model/DocumentContextParameterTypeConstants.java
@@ -19,7 +19,7 @@
 package org.mustangproject.ZUGFeRD.model;
 
 public class DocumentContextParameterTypeConstants {
+	public static final String BASIC = "urn:ferd:CrossIndustryDocument:invoice:1p0:basic";
 	public static final String COMFORT = "urn:ferd:CrossIndustryDocument:invoice:1p0:comfort";
 	public static final String EXTENDED = "urn:ferd:CrossIndustryDocument:invoice:1p0:extended";
-	// this does not look complete :-/
 }