The Adjancency List Schema Representation

<?xml version="1.0" encoding="UTF-8"?>
<!-- edited with XML Spy v4.0 U (http://www.xmlspy.com) by Heather D. Pfeiffer (NMSU / Dept. CS) -->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" attributeFormDefault="unqualified">
	<xs:element name="cgraph">
		<xs:annotation>
			<xs:documentation>Conceptual Graph - Using Adjacency list representation</xs:documentation>
		</xs:annotation>
		<xs:complexType>
			<xs:all>
				<xs:element name="con-list">
					<xs:complexType>
						<xs:sequence minOccurs="0" maxOccurs="unbounded">
							<xs:element ref="concept"/>
						</xs:sequence>
					</xs:complexType>
				</xs:element>
				<xs:element name="RC-list">
					<xs:complexType>
						<xs:sequence minOccurs="0" maxOccurs="unbounded">
							<xs:element ref="relation"/>
							<xs:element ref="concept"/>
						</xs:sequence>
					</xs:complexType>
				</xs:element>
				<xs:element name="CR-list">
					<xs:complexType>
						<xs:sequence minOccurs="0" maxOccurs="unbounded">
							<xs:element ref="concept"/>
							<xs:element ref="relation"/>
						</xs:sequence>
					</xs:complexType>
				</xs:element>
				<xs:element name="AC-list">
					<xs:complexType>
						<xs:sequence minOccurs="0" maxOccurs="unbounded">
							<xs:element ref="actor"/>
							<xs:element ref="concept"/>
						</xs:sequence>
					</xs:complexType>
				</xs:element>
				<xs:element name="CA-list">
					<xs:complexType>
						<xs:sequence minOccurs="0" maxOccurs="unbounded">
							<xs:element ref="concept"/>
							<xs:element ref="actor"/>
						</xs:sequence>
					</xs:complexType>
				</xs:element>
			</xs:all>
			<xs:attribute name="uniquegraph" type="xs:ID" use="required"/>
		</xs:complexType>
	</xs:element>
	<xs:element name="cgs">
		<xs:annotation>
			<xs:documentation>Set of Conceptual Graphs in a file</xs:documentation>
		</xs:annotation>
		<xs:complexType>
			<xs:sequence maxOccurs="unbounded">
				<xs:element ref="cgraph"/>
				<xs:element name="period" type="xs:string" minOccurs="0"/>
			</xs:sequence>
		</xs:complexType>
	</xs:element>
	<xs:element name="concept">
		<xs:annotation>
			<xs:documentation>Concept Node - gives the conceptual type information</xs:documentation>
		</xs:annotation>
		<xs:complexType>
			<xs:sequence>
				<xs:element ref="referent" minOccurs="0"/>
				<xs:element ref="typelabel" minOccurs="0"/>
				<xs:element ref="cgraph" minOccurs="0"/>
			</xs:sequence>
			<xs:attribute name="uniquecon" type="xs:ID" use="required"/>
		</xs:complexType>
	</xs:element>
	<xs:element name="relation">
		<xs:annotation>
			<xs:documentation>Relation Node - gives a conceptual relationship between concept types</xs:documentation>
		</xs:annotation>
		<xs:complexType>
			<xs:all>
				<xs:element ref="typelabel"/>
			</xs:all>
			<xs:attribute name="uniquerel" type="xs:ID" use="required"/>
		</xs:complexType>
	</xs:element>
	<xs:element name="actor">
		<xs:annotation>
			<xs:documentation>Actor Node - gives a conceptual relation that has a functional element</xs:documentation>
		</xs:annotation>
		<xs:complexType>
			<xs:all>
				<xs:element ref="typelabel"/>
			</xs:all>
			<xs:attribute name="uniqueact" type="xs:ID" use="required"/>
		</xs:complexType>
	</xs:element>
	<xs:element name="referent">
		<xs:complexType>
			<xs:all>
				<xs:element name="literal">
					<xs:complexType>
						<xs:all>
							<xs:element ref="litstring" minOccurs="0"/>
							<xs:element name="number" type="xs:integer" minOccurs="0"/>
						</xs:all>
					</xs:complexType>
				</xs:element>
				<xs:element name="locator">
					<xs:complexType>
						<xs:all>
							<xs:element name="name" type="xs:Name" minOccurs="0"/>
							<xs:element name="marker" type="xs:positiveInteger" minOccurs="0"/>
							<xs:element name="identifier" type="xs:ID" minOccurs="0"/>
						</xs:all>
					</xs:complexType>
				</xs:element>
				<xs:element name="quantifier">
					<xs:complexType>
						<xs:all>
							<xs:element name="qmarker" type="xs:positiveInteger" minOccurs="0"/>
							<xs:element name="liststring" minOccurs="0">
								<xs:complexType>
									<xs:sequence maxOccurs="unbounded">
										<xs:element ref="litstring"/>
									</xs:sequence>
								</xs:complexType>
							</xs:element>
						</xs:all>
					</xs:complexType>
				</xs:element>
			</xs:all>
		</xs:complexType>
	</xs:element>
	<xs:element name="typelabel">
		<xs:complexType>
			<xs:simpleContent>
				<xs:extension base="xs:string"/>
			</xs:simpleContent>
		</xs:complexType>
	</xs:element>
	<xs:element name="litstring" type="xs:string"/>
	<xs:complexType name="conceptType">
		<xs:sequence maxOccurs="unbounded">
			<xs:element ref="concept"/>
		</xs:sequence>
	</xs:complexType>
</xs:schema>