position (ChamferPos)

b2bOpticJobData → items → item → pair → edging → chamfer

values	description
BOTH
FRONT
BACK

<xs:simpleType name="ChamferPos">
  <xs:restriction base="xs:string">
    <xs:enumeration value="BOTH" />
    <xs:enumeration value="FRONT" />
    <xs:enumeration value="BACK" />
  </xs:restriction>
</xs:simpleType>