E1-21 Error

Hi,

I think the description "Unless B is the content model wildcard of the
ur-type definition," in
the following correction is unnecessary because you won't have a case that
can reach
here and have B be the content model wildcard of the ur-type definition.

The normal case that reaches "Schema Component Constraint: Particle
Derivation OK
(Any:Any -- NSSubset)" is an example as given below.  If my thinking is
wrong, please
give an example that can illustrate what the description tries to elaborate.

My understanding of ur-type is as such: an element can be ur-type.  But, for
Particle
Derivation OK checking, it will reach "Schema Component Constraint: Particle
Restriction OK (Elt:Elt -- NameAndTypeOK)" instead of "Any:Any -- NSSubset".


Thx,

-Stanley
============================================================

Schema Component Constraint: Particle Derivation OK (Any:Any -- NSSubset)

For a wildcard particle to be a ·valid restriction· of another wildcard
particle all of the following must be true:
1 R's occurrence range must be a valid restriction of B's occurrence range
as defined by Occurrence Range OK (§3.9.6).
2 R's {namespace constraint} must be an intensional subset of B's {namespace
constraint} as defined by Wildcard Subset (§3.10.6).
↑
3 Unless B is the content model wildcard of the ·ur-type definition·, R's
{process contents} must be identical to or stronger than B's {process
contents}, where strict is stronger than lax is stronger than skip.
↑
Note:

↑
The exception to the third clause above for derivations from the ·ur-type
definition· is necessary as its wildcards have a {process contents} of lax,
so without this exception, no use of wildcards with {process contents} of
skip would be possible.
↑
============================================================
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

  <xsd:complexType name="baseType1" mixed="true">
    <xsd:sequence minOccurs="0" maxOccurs="unbounded">
      <xsd:any namespace="##any" processContents="lax"/>
    </xsd:sequence>
  </xsd:complexType>
  <xsd:complexType name="baseTitleType">

    <xsd:complexContent>
      <xsd:restriction base="baseType1">
        <xsd:sequence minOccurs="0" maxOccurs="unbounded">
          <xsd:any namespace="##any" processContents="skip"/>
        </xsd:sequence>
      </xsd:restriction>
    </xsd:complexContent>
  </xsd:complexType>

  <xsd:element name="root"/>

</xsd:schema>