diff --git a/schema.xsd b/schema.xsd
index 22e13e6..dc6ff3e 100644
--- a/schema.xsd
+++ b/schema.xsd
@@ -16,17 +16,9 @@
     </xsd:element>
 
     <xsd:complexType name="ExternalLib">
-        <xsd:sequence>
-            <xsd:element type="ExternalFamily" name="family" minOccurs="1" maxOccurs="unbounded"/>
-        </xsd:sequence>
         <xsd:attribute type="xsd:string" name="name" use="required"/>
     </xsd:complexType>
 
-    <xsd:complexType name="ExternalFamily">
-        <xsd:attribute type="xsd:string" name="name" use="required"/>
-        <xsd:attribute type="xsd:string" name="short" use="required"/>
-    </xsd:complexType>
-
     <xsd:element name="family">
         <xsd:annotation><xsd:documentation>Root element for family definition files</xsd:documentation></xsd:annotation>
         <xsd:complexType>