B2BCatalogTopBottom

b2bOpticLensCatalog→lensGeos→lensGeo→bifocal→nearPortion
b2bOpticLensCatalog→lensGeos→lensGeo→trifocal→nearPortion

B2BCatalogTopBottom

top
type	xs:decimal
unity	mm
occurs	1
description	radius of the upper part of the near portion

bottom
type	xs:decimal
unity	mm
occurs	1
description	radius of the lower part of the near portion

<xs:complexType name="B2BCatalogTopBottom">
  <xs:sequence>
    <xs:element name="top" type="xs:decimal"/>
    <xs:element name="bottom" type="xs:decimal"/>
  </xs:sequence>
</xs:complexType>