diff --git a/schema.xsd b/schema.xsd
index 4a29688..22e13e6 100644
--- a/schema.xsd
+++ b/schema.xsd
@@ -6,6 +6,7 @@
     <xsd:import namespace="http://www.w3.org/XML/1998/namespace"/>
 
     <xsd:element name="library">
+        <xsd:annotation><xsd:documentation>Root element for library.xml files</xsd:documentation></xsd:annotation>
         <xsd:complexType>
             <xsd:sequence>
                 <xsd:element type="ExternalLib" name="external-lib" minOccurs="0" maxOccurs="unbounded"/>
@@ -27,6 +28,7 @@
     </xsd:complexType>
 
     <xsd:element name="family">
+        <xsd:annotation><xsd:documentation>Root element for family definition files</xsd:documentation></xsd:annotation>
         <xsd:complexType>
             <xsd:sequence>
                 <xsd:element type="xsd:string" name="description"/>