<?xml version="1.0" encoding="UTF-8" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="UnitDefinition" type="UnitDefinitionType"/>
<xs:element name="BaseUnit" type="BaseUnitType"/>
<xs:complexType name="UnitDefinitionType">
<xs:sequence>
<xs:element name="base_units">
<xs:annotation>
<xs:documentation>
Base or factor units that define this unit.
</xs:documentation>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:element name="BaseUnit" type="BaseUnitType" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="id" type="xs:string">
<xs:annotation>
<xs:documentation>
Unique identifier of the unit definition.
</xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="name" type="xs:string">
<xs:annotation>
<xs:documentation>
Common or human-readable name of the unit definition.
</xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:complexType>
<xs:complexType name="BaseUnitType">
<xs:attribute name="kind" type="UnitTypeType" use="required">
<xs:annotation>
<xs:documentation>
Kind of the base unit (e.g., meter, kilogram, second).
</xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="exponent" type="xs:integer" use="required">
<xs:annotation>
<xs:documentation>
Exponent of the base unit in the unit definition.
</xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="multiplier" type="xs:float">
<xs:annotation>
<xs:documentation>
Multiplier applied to the base unit.
</xs:documentation>
</xs:annotation>
</xs:attribute>
<xs:attribute name="scale" type="xs:float">
<xs:annotation>
<xs:documentation>
Power-of-ten scale applied to the base unit.
</xs:documentation>
</xs:annotation>
</xs:attribute>
</xs:complexType>
<xs:simpleType name="UnitTypeType">
<xs:restriction base="xs:string">
<xs:enumeration value="ampere"/>
<xs:enumeration value="avogadro"/>
<xs:enumeration value="becquerel"/>
<xs:enumeration value="candela"/>
<xs:enumeration value="celsius"/>
<xs:enumeration value="coulomb"/>
<xs:enumeration value="dimensionless"/>
<xs:enumeration value="farad"/>
<xs:enumeration value="gram"/>
<xs:enumeration value="gray"/>
<xs:enumeration value="henry"/>
<xs:enumeration value="hertz"/>
<xs:enumeration value="item"/>
<xs:enumeration value="joule"/>
<xs:enumeration value="katal"/>
<xs:enumeration value="kelvin"/>
<xs:enumeration value="kilogram"/>
<xs:enumeration value="litre"/>
<xs:enumeration value="lumen"/>
<xs:enumeration value="lux"/>
<xs:enumeration value="metre"/>
<xs:enumeration value="mole"/>
<xs:enumeration value="newton"/>
<xs:enumeration value="ohm"/>
<xs:enumeration value="pascal"/>
<xs:enumeration value="radian"/>
<xs:enumeration value="second"/>
<xs:enumeration value="siemens"/>
<xs:enumeration value="sievert"/>
<xs:enumeration value="steradian"/>
<xs:enumeration value="tesla"/>
<xs:enumeration value="volt"/>
<xs:enumeration value="watt"/>
<xs:enumeration value="weber"/>
</xs:restriction>
</xs:simpleType>
</xs:schema>