ForCES model xml schema boolean type defition error

I use Altova XMLspy to check the model xml schema and find out an error in 
the definition of boolean,in the schema,we define boolean type has two 
enumeration value as "0" and "1":
       <xsd:simpleType name="booleanType"> 
        <xsd:restriction base="xsd:string"> 
          <xsd:enumeration value="0"/> 
          <xsd:enumeration value="1"/> 
        </xsd:restriction> 
       </xsd:simpleType> 
but when we use this to define outputPortType and inputPortType,we use 
"no",so the altova complain error,we could change the booleanType 
enumeration to correct this error.
<xsd:simpleType name="booleanType"> 
        <xsd:restriction base="xsd:string"> 
          <xsd:enumeration value="no"/> 
          <xsd:enumeration value="yes"/> 
        </xsd:restriction> 
       </xsd:simpleType> 

probably this issue has been change,if that is the case,sorry for the 
noise.
BTW,today i access the ietf website only to find that the model draft is 
not on the draft list,could anyone told me why?
Yours,Fenggen

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