reference (OCReferences)

b2boptic → items → item → pair → lens → centration → height

values	description
FAR	far distance
NEAR	near distance

<xs:simpleType name="OCReferences">
  <xs:restriction base="xs:string">
    <xs:enumeration value="FAR" />
    <xs:enumeration value="NEAR" />
  </xs:restriction>
</xs:simpleType>