You can simple type element content by using the simpleContent element.

Here you can define an anonymous simple type:

<xs:complexType name="uriElement">
  <xs:simpleContent>
  <xs:restriction base="my:absoluteURI">
    <xs:pattern value="http://cde.berkeley.edu/.*"/>
  </xs:restriction>
  </xs:simpleContent>
</xs:complexType>
<xs:element name="uri" type="my:uriElement"/>

This still creates an anonymous type:

<xs:complexType name="uriElement">
  <xs:simpleContent>
  <xs:restriction base="my:cdeURI"/>
  </xs:simpleContent>
</xs:complexType>
<xs:element name="uri" type="my:uriElement"/>

For the above, just use the simple type directly in the element declaration:

<xs:element name="uri" type="my:cdeURI"/>

This avoids the anonymous type and the unnecessary creation of a complex type.