diff --git a/lib/internal/Magento/Framework/ObjectManager/etc/config.xsd b/lib/internal/Magento/Framework/ObjectManager/etc/config.xsd
index c21070ed84d24..c5419464a8353 100644
--- a/lib/internal/Magento/Framework/ObjectManager/etc/config.xsd
+++ b/lib/internal/Magento/Framework/ObjectManager/etc/config.xsd
@@ -26,6 +26,20 @@
         </xs:complexType>
     </xs:redefine>
 
+    <xs:simpleType name="phpFqcn">
+        <xs:annotation>
+            <xs:documentation>
+                A string that matches a Fully Qualified Class Name from PHP, especially not starting
+                with a backslash as this is an invalid character to start a class name with but a
+                somewhat common mistake so this simple type can be used to validate against it
+                already
+            </xs:documentation>
+        </xs:annotation>
+        <xs:restriction base="xs:string">
+            <xs:pattern value="([a-zA-Z_&#x7f;-&#xff;][a-zA-Z0-9_&#x7f;-&#xff;]*)(\\[a-zA-Z_&#x7f;-&#xff;][a-zA-Z0-9_&#x7f;-&#xff;]*)*"/>
+        </xs:restriction>
+    </xs:simpleType>
+
     <xs:complexType name="init_parameter">
         <xs:complexContent>
             <xs:extension base="argumentType" />
@@ -102,8 +116,8 @@
                 Preference help Object Manager to choose class for corresponding interface
             </xs:documentation>
         </xs:annotation>
-        <xs:attribute name="for" type="xs:string" use="required" />
-        <xs:attribute name="type" type="xs:string" use="required" />
+        <xs:attribute name="for" type="phpFqcn" use="required"/>
+        <xs:attribute name="type" type="phpFqcn" use="required" />
     </xs:complexType>
 
     <xs:complexType name="typeType">
@@ -121,7 +135,7 @@
             </xs:element>
             <xs:element name="plugin" type="pluginType" minOccurs="0" maxOccurs="unbounded" />
         </xs:choice>
-        <xs:attribute name="name" type="xs:string" use="required" />
+        <xs:attribute name="name" type="phpFqcn" use="required" />
         <xs:attribute name="shared" type="xs:boolean" use="optional" />
     </xs:complexType>
 
@@ -133,14 +147,14 @@
                         With 'virtualType' tag you can point parameters and plugins for autogenerated class
                     </xs:documentation>
                 </xs:annotation>
-                <xs:attribute name="type" type="xs:string" use="optional" />
+                <xs:attribute name="type" type="phpFqcn" use="optional" />
             </xs:extension>
         </xs:complexContent>
     </xs:complexType>
 
     <xs:complexType name="pluginType">
         <xs:attribute name="name" type="xs:string" use="required" />
-        <xs:attribute name="type" type="xs:string" use="optional" />
+        <xs:attribute name="type" type="phpFqcn" use="optional" />
         <xs:attribute name="disabled" type="xs:boolean" use="optional" />
         <xs:attribute name="sortOrder" type="xs:int" use="optional" />
     </xs:complexType>