error in "schema" instance in Part I of Schema specification

The "derivedBy" attribute has not been defined for the "simpleType" tag below occurring in the "schema" instance in appendix A of part 1 of the XML Schema specifcation.

<simpleType name="derivationSet" base="derivationChoiceOrAll" derivedBy="list">

This can be seen from the following declarations in the "part2" DTD in appendix B of part 2 of the XML Schema specification.

<!ENTITY % p ''> <!-- can be overriden in the internal subset of a
                      schema document to establish a namespace prefix -->
<!-- Define all the element names, with optional prefix -->

<!ENTITY % simpleType "%p;simpleType">

<!ENTITY % simpleTypeAttrs ''>

<!ATTLIST %simpleType;
    name      %NCName;                 #IMPLIED
    base      %QName;                  #REQUIRED
    %simpleTypeAttrs;>