diff -r 0e1bf3c199bf -r a8a5f3dd5c3d make/uwproj.xsd
--- a/make/uwproj.xsd	Thu Oct 31 12:15:45 2024 +0100
+++ b/make/uwproj.xsd	Thu Oct 31 13:24:39 2024 +0100
@@ -17,7 +17,7 @@
             </xs:documentation>
         </xs:annotation>
         <xs:sequence>
-            <xs:element name="config" type="ConfigType" minOccurs="0"/>
+            <xs:element name="config" type="ConfigType" minOccurs="0" maxOccurs="unbounded"/>
             <xs:element name="dependency" type="DependencyType" minOccurs="0" maxOccurs="unbounded"/>
             <xs:element name="target" type="TargetType" minOccurs="0" maxOccurs="unbounded"/>
         </xs:sequence>
@@ -26,13 +26,23 @@
     <xs:complexType name="ConfigType">
         <xs:annotation>
             <xs:documentation>
-                The configuration section.
-                Consists of an arbitrary number of <code>var</code> elements.
+                <p>
+                    The configuration section.
+                    Consists of an arbitrary number of <code>var</code> elements.
+                </p>
+                <p>
+                    The optional <code>platform</code> attribute may specify a <em>single</em> platform identifier and
+                    the optional <code>not</code> attribute may specify a comma-separated list of platform identifiers.
+                    The configure script shall skip this config declaration if the detected platform is not matching
+                    the filter specification of these attributes.
+                </p>
             </xs:documentation>
         </xs:annotation>
         <xs:sequence>
             <xs:element name="var" type="ConfigVarType" minOccurs="0" maxOccurs="unbounded"/>
         </xs:sequence>
+        <xs:attribute name="platform" type="xs:string"/>
+        <xs:attribute name="not" type="xs:string"/>
     </xs:complexType>
 
     <xs:complexType name="ConfigVarType">
@@ -195,11 +205,11 @@
         </xs:annotation>
         <xs:choice minOccurs="0" maxOccurs="unbounded">
             <xs:group ref="TargetDataGroup"/>
+            <xs:element name="desc" type="xs:string"/>
         </xs:choice>
         <xs:attribute name="name" type="xs:string" use="required"/>
         <xs:attribute name="arg" type="xs:string"/>
         <xs:attribute name="default" type="xs:boolean" default="false"/>
-        <xs:element name="desc" type="xs:string"/>
     </xs:complexType>
 
     <xs:complexType name="OptionType">