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

<xs:schema attributeFormDefault="unqualified"

	elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">

	<xs:element name="values">

		<xs:complexType>

			<xs:sequence>

				<xs:element name="item" maxOccurs="unbounded" minOccurs="0">

					<xs:complexType>

						<xs:sequence>

							<xs:element name="component" maxOccurs="unbounded"

								minOccurs="0">

								<xs:complexType>

									<xs:simpleContent>

										<xs:extension base="xs:string">

											<xs:attribute type="xs:string" name="name" use="required" />

										</xs:extension>

									</xs:simpleContent>

								</xs:complexType>

							</xs:element>

						</xs:sequence>

						<xs:attribute type="xs:string" name="label" use="optional" />

						<xs:attribute name="value" use="required">

							<xs:annotation>

								<xs:documentation>The regular expression in the constraint of

									the "value" attribute is: 1) a valid rgb() expression or 2) a

									valid hex number or 3) a valid alpha expression or 4) a three

									digit hex triple or 5) a valid %rgb() expression.</xs:documentation>

							</xs:annotation>

							<xs:simpleType>

<!-- TODO: Need to modify the last pattern below (%rgb() to accept digits from 0 to 100 instead of from 1 to 99 -->

								<xs:restriction base="xs:string">

									<xs:pattern

										value="rgb\((((\d{1,2})|(1\d{2})|(2[0-4]\d)|(25[0-5])),\s?){2}(((\d{1,2})|(1\d{2})|(2[0-4]\d)|(25[0-5]))){1}\)|#(([0-9a-fA-F]){6})|([A-Z,a-z]+)|#([0-9a-fA-F]){3}|rgb\(([1-9][0-9]{0,1}%,\s?){2}([1-9][0-9]{0,1}%)\)">

									</xs:pattern>

								</xs:restriction>

							</xs:simpleType>

						</xs:attribute>

					</xs:complexType>

				</xs:element>

			</xs:sequence>

			<xs:attribute type="xs:string" name="default" use="optional" />

			<xs:attribute type="xs:string" name="label" use="optional" />

		</xs:complexType>

	</xs:element>

</xs:schema>