diff --git a/src/main/model/xsd/scenarios.xsd b/src/main/model/xsd/scenarios.xsd
index fd6d9e3..9521ceb 100644
--- a/src/main/model/xsd/scenarios.xsd
+++ b/src/main/model/xsd/scenarios.xsd
@@ -1,21 +1,4 @@
 <?xml version="1.0" encoding="UTF-8" ?>
-<!--
-  ~ Copyright 2017-2022  Koordinierungsstelle für IT-Standards (KoSIT)
-  ~
-  ~ Licensed under the Apache License, Version 2.0 (the "License");
-  ~ you may not use this file except in compliance with the License.
-  ~ You may obtain a copy of the License at
-  ~
-  ~     http://www.apache.org/licenses/LICENSE-2.0
-  ~
-  ~ Unless required by applicable law or agreed to in writing, software
-  ~ distributed under the License is distributed on an "AS IS" BASIS,
-  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  ~ See the License for the specific language governing permissions and
-  ~ limitations under the License.
-  -->
-
-<!-- $Id$ -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:s="http://www.xoev.de/de/validator/framework/1/scenarios" targetNamespace="http://www.xoev.de/de/validator/framework/1/scenarios" version="1.1.0" elementFormDefault="qualified" attributeFormDefault="unqualified">
 
     <xs:element name="scenarios">
@@ -72,13 +55,19 @@
     <xs:simpleType name="Tokens">
         <xs:list itemType="xs:token" />
     </xs:simpleType>
+    
+    <xs:simpleType name="NonEmptyString">
+      <xs:restriction base="xs:string">
+        <xs:minLength value="1"/>
+      </xs:restriction>  
+    </xs:simpleType>
 
     <xs:complexType name="ScenarioType">
         <xs:sequence>
             <xs:element name="name" type="xs:token" />
             <xs:element minOccurs="0" name="description" type="s:DescriptionType" />
             <xs:element minOccurs="0" maxOccurs="unbounded" name="namespace" type="s:NamespaceType" />
-            <xs:element name="match" type="xs:string" />
+            <xs:element name="match" type="s:NonEmptyString" />
             <xs:element name="validateWithXmlSchema" type="s:ValidateWithXmlSchema" />
             <xs:element name="validateWithSchematron" maxOccurs="unbounded" minOccurs="0" type="s:ValidateWithSchematron" />
             <xs:element name="createReport" type="s:CreateReportType" minOccurs="0"/>
@@ -138,3 +127,18 @@
         </xs:simpleContent>
     </xs:complexType>
 </xs:schema>
+<!--
+  ~ Copyright 2017-2026  Koordinierungsstelle für IT-Standards (KoSIT)
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->