diff --git a/src/test/resources/profile_schemas/profile5.xsd b/src/test/resources/profile_schemas/profile5.xsd
index e620a50..a0f97a1 100644
--- a/src/test/resources/profile_schemas/profile5.xsd
+++ b/src/test/resources/profile_schemas/profile5.xsd
@@ -7,6 +7,15 @@
 		<xs:complexType>
 			<xs:sequence>
 				<xs:element type="ExtendedMetadataFieldType" name="metadatafield" minOccurs="0" maxOccurs="unbounded" />
+				<xs:element type="ExtraMetadataFormatType" name="extra" minOccurs="0" maxOccurs="1">
+					<xs:annotation>
+						<xs:documentation>
+							Any additional tag in this 'extra' tag. 
+							This tag and its content are ignored by the validators. 
+							They are used by any external tools producing/consuming the profile definition and instances.
+						</xs:documentation>
+					</xs:annotation>
+				</xs:element>
 			</xs:sequence>
 			<xs:attribute type="NotEmpty" use="required" name="type">
 				<xs:annotation>
@@ -178,7 +187,16 @@
 		</xs:sequence>
 		<xs:attribute type="xs:boolean" name="isMultiSelection"/>
 	</xs:complexType>
-	<xs:complexType name="Extra">
+	<xs:complexType name="ExtraMetadataFieldType">
+		<xs:sequence>
+			<xs:any minOccurs="0" maxOccurs="unbounded" processContents="skip">
+				<xs:annotation>
+					<xs:documentation>Any tags are allowed</xs:documentation>
+				</xs:annotation>
+			</xs:any>				
+		</xs:sequence>
+	</xs:complexType>
+	<xs:complexType name="ExtraMetadataFormatType">
 		<xs:sequence>
 			<xs:any minOccurs="0" maxOccurs="unbounded" processContents="skip">
 				<xs:annotation>
@@ -191,10 +209,12 @@
 		<xs:complexContent>
 			<xs:extension base="MetadataFieldType">
 				<xs:sequence>
-					<xs:element type="Extra" name="extra" minOccurs="0" maxOccurs="1">
+					<xs:element type="ExtraMetadataFieldType" name="extra" minOccurs="0" maxOccurs="1">
 						<xs:annotation>
 							<xs:documentation>
-								Any 'metadataField' definition can include any additional attribute in this 'extra' tag. This tag and its content are ignored by the validators. They are used by any external tools producing/consuming the profile definition and instances.
+								Any additional tag in this 'extra' tag.
+								This tag and its content are ignored by the validators.
+								They are used by any external tools producing/consuming the profile definition and instances.
 							</xs:documentation>
 						</xs:annotation>
 					</xs:element>