<?xml version=“1.0” encoding=“utf-8”?> <xs:schema

attributeFormDefault="unqualified"
elementFormDefault="qualified"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:include schemaLocation="types.xsd" />
<xs:simpleType name="dimensionValue">
  <xs:restriction base="nonNegativeDecimal">
    <xs:fractionDigits value="3" />
  </xs:restriction>
</xs:simpleType>
<xs:simpleType name="sizeUnit">
  <xs:restriction base="xs:token">
    <xs:enumeration value="um" />
    <xs:enumeration value="µm" />
    <xs:enumeration value="mm" />
    <xs:enumeration value="cm" />
    <xs:enumeration value="dm" />
    <xs:enumeration value="m" />
    <xs:enumeration value="km" />
    <xs:enumeration value="in" />
    <xs:enumeration value="ft" />
    <xs:enumeration value="yd" />
  </xs:restriction>
</xs:simpleType>
<xs:complexType name="size">
  <xs:sequence>
    <xs:element name="value" minOccurs="1" maxOccurs="1" type="dimensionValue" />
    <xs:element name="unit" minOccurs="1" maxOccurs="1" type="sizeUnit" />
  </xs:sequence>
</xs:complexType>
<xs:simpleType name="massUnit">
  <xs:restriction base="xs:token">
    <xs:enumeration value="mcg" />
    <xs:enumeration value="µg" />
    <xs:enumeration value="mg" />
    <xs:enumeration value="g" />
    <xs:enumeration value="hg" />
    <xs:enumeration value="kg" />
    <xs:enumeration value="t" />
    <xs:enumeration value="gr" />
    <xs:enumeration value="oz" />
    <xs:enumeration value="lb" />
  </xs:restriction>
</xs:simpleType>
<xs:complexType name="mass">
  <xs:sequence>
    <xs:element name="value" minOccurs="1" maxOccurs="1" type="dimensionValue" />
    <xs:element name="unit" minOccurs="1" maxOccurs="1" type="massUnit" />
  </xs:sequence>
</xs:complexType>
<xs:complexType name="dimensions">
  <xs:sequence>
    <xs:element name="height" minOccurs="0" maxOccurs="1" type="size" />
    <xs:element name="width" minOccurs="0" maxOccurs="1" type="size" />
    <xs:element name="length" minOccurs="0" maxOccurs="1" type="size" />
    <xs:element name="weight" minOccurs="0" maxOccurs="1" type="mass" />
  </xs:sequence>
</xs:complexType>

</xs:schema>