B2BCatalogDatePeriod

b2bOpticLensCatalog→lenses→lens
b2bOpticLensCatalog→lensRanges→lensRange
b2bOpticLensCatalog→lensPriceGroups→ lensPriceGroup→ lensPriceSet→matching
b2bOpticLensCatalog→options→option
b2bOpticLensCatalog→optionPriceGroups→optionPriceGroup→optionPriceSet→matching
b2bOpticLensCatalog→combinationTrees→combinationTree

start
type	xs:date
occurs	1
description	Deliverable/valid from

end
type	xs:date
occurs	0..1
description	Deliverable/valid until

end
type	xs:date
occurs	1
description	Deliverable/valid until

<xs:complexType name="B2BCatalogDatePeriod">
  <xs:choice>
    <xs:sequence>
      <xs:element name="start" type="xs:date"/>
      <xs:element minOccurs="0" name="end" type="xs:date"/>
    </xs:sequence>
    <xs:element name="end" type="xs:date"/>
  </xs:choice>
</xs:complexType>