<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns="http://water.usgs.gov/XML/AQ" xmlns:xsd="http://www.w3.org/2001/XMLSchema" targetNamespace="http://water.usgs.gov/XML/AQ" elementFormDefault="qualified" version="1.0">
	<xsd:include schemaLocation="../shared/DateTimeWithDatum.xsd"/>
	<xsd:include schemaLocation="../shared/IEEE754FloatValue.xsd"/>
	<xsd:include schemaLocation="../shared/string1.xsd"/>
	<xsd:include schemaLocation="../shared/string16.xsd"/>
	<xsd:include schemaLocation="../shared/DataAgingCode.xsd"/>

	<xsd:element name="UnitValue">
		<xsd:annotation>
			<xsd:documentation>
				<Definition>An individual unit value.</Definition>
			</xsd:documentation>
		</xsd:annotation>
		<xsd:complexType>
			<xsd:sequence>
				<xsd:element name="Repeat" minOccurs="0">
					<xsd:annotation>
						<xsd:documentation>
							<Definition>Indicates that the unit value and all of its info repeats for a given number of unit values with a constant time interval between repeated unit values.</Definition>
						</xsd:documentation>
					</xsd:annotation>
					<xsd:complexType>
						<xsd:attribute name="count" type="xsd:integer" use="required">
							<xsd:annotation>
								<xsd:documentation>
									<Definition>The count of consecutive unit values.</Definition>
								</xsd:documentation>
							</xsd:annotation>
						</xsd:attribute>
						<xsd:attribute name="interval" type="string16" use="required">
							<xsd:annotation>
								<xsd:documentation>
									<Definition>The time interval between the consecutive unit values, in the format HH:MM:SS.</Definition>
								</xsd:documentation>
							</xsd:annotation>
						</xsd:attribute>
					</xsd:complexType>
				</xsd:element>
				<xsd:element name="DateTime" type="DateTimeWithDatum">
					<xsd:annotation>
						<xsd:documentation>
							<Definition>The date and time of the unit value.</Definition>
						</xsd:documentation>
					</xsd:annotation>
				</xsd:element>
				<xsd:element name="Value" type="IEEE754FloatValueType" nillable="true"/>
				<xsd:element ref="DataAgingCode"/>
				<xsd:element name="RemarkCode" type="string1"  minOccurs="0">
					<xsd:annotation>
						<xsd:documentation>
							<Definition>A code indicating a specific remark about he value.</Definition>
						</xsd:documentation>
					</xsd:annotation>
				</xsd:element>
				<xsd:element name="Flags" type="string16">
					<xsd:annotation>
						<xsd:documentation>
							<Definition>A series of flags containing additional information about he value.</Definition>
						</xsd:documentation>
					</xsd:annotation>
				</xsd:element>
			</xsd:sequence>
		</xsd:complexType>
	</xsd:element>
</xsd:schema>
