diff --git a/e.dtd b/e.dtd
new file mode 100644
index 00000000..49976fb1
--- /dev/null
+++ b/e.dtd
@@ -0,0 +1,6 @@
+<?xml encoding="UTF-8"?>
+
+<!ELEMENT e (#PCDATA)>
+<!ATTLIST e
+  xmlns CDATA #FIXED ''
+  e NMTOKEN #REQUIRED>
diff --git a/e.xsd b/e.xsd
new file mode 100644
index 00000000..f1d78e15
--- /dev/null
+++ b/e.xsd
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
+  <xs:element name="e">
+    <xs:complexType>
+      <xs:simpleContent>
+        <xs:extension base="xs:NCName">
+          <xs:attribute name="e" use="required" type="xs:NCName"/>
+        </xs:extension>
+      </xs:simpleContent>
+    </xs:complexType>
+  </xs:element>
+</xs:schema>