Doctrine 2: precission and scale not allowed by XML schema

Hi,

I've found the scale and precision column/field attributes are not allowed by XML schema at http://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd:

<xs:complexType name="field">
<xs:attribute name="name" type="xs:NMTOKEN" use="required" />
<xs:attribute name="type" type="xs:NMTOKEN" default="string" />
<xs:attribute name="column" type="xs:NMTOKEN" />
<xs:attribute name="length" type="xs:NMTOKEN" />
<xs:attribute name="unique" type="xs:boolean" default="false" />
<xs:attribute name="nullable" type="xs:boolean" default="false" />
<xs:attribute name="version" type="xs:boolean" />
<xs:attribute name="column-definition" type="xs:string" />
</xs:complexType>

but these attributes are referred in the documentation:

http://www.doctrine-project.org/projects/orm/2.0/docs/reference/annotations-reference/en#reference:@column

Is scale and precision allowed in Doctrine 2? Thank you