<?xml version="1.0" encoding="UTF-8" ?>

<xsd:schema elementFormDefault="qualified">
<!-- note most of the below uomTypes and their associated definitions are derived from the xml listing at http://nautilus.baruch.sc.edu/obsrss/uom_types.xml -->
       <xsd:simpleType name="uomType">
       <xsd:restriction base="xsd:string">

       <xsd:enumeration value="celsius"/>
       <xsd:enumeration value="fahrenheit"/>
       <xsd:enumeration value="cm_s-1"/>
       <xsd:enumeration value="degrees_true"/>
       <xsd:enumeration value="m_s-1"/>       
       <xsd:enumeration value="knots"/>
       <xsd:enumeration value="mph"/>
       <xsd:enumeration value="m"/>
       <xsd:enumeration value="ft"/>
       <xsd:enumeration value="mS_cm-1"/>
       <xsd:enumeration value="mg_L-1"/>
       <xsd:enumeration value="ug_L-1"/>
       <xsd:enumeration value="mb"/>
       <xsd:enumeration value="millibar"/>
       <xsd:enumeration value="millimeter"/>
       <xsd:enumeration value="millimoles_per_m^2"/>
       <xsd:enumeration value="micromoles_per_m^2_per_s"/>
       <xsd:enumeration value="nautical_miles"/>
       <xsd:enumeration value="ntu"/>
       <xsd:enumeration value="percent"/>
       <xsd:enumeration value="ppt"/>
       <xsd:enumeration value="psu"/>
       <xsd:enumeration value="s"/>
       <xsd:enumeration value="units"/>

       <xsd:enumeration value="ft_s-1"/>
       <xsd:enumeration value="cubic_ft_s-1"/>

       </xsd:restriction>
       </xsd:simpleType>
</xsd:schema>
