diff --git a/src/main/java/org/mustangproject/ZUGFeRD/model/DocumentContextParameterTypeConstants.java b/src/main/java/org/mustangproject/ZUGFeRD/model/DocumentContextParameterTypeConstants.java
new file mode 100644
index 00000000..4dfd44fa
--- /dev/null
+++ b/src/main/java/org/mustangproject/ZUGFeRD/model/DocumentContextParameterTypeConstants.java
@@ -0,0 +1,7 @@
+package org.mustangproject.ZUGFeRD.model;
+
+public class DocumentContextParameterTypeConstants {
+	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 :-/
+}