<?xml version="1.0" encoding="UTF-8"?><!-- edited with XMLSpy v2005 sp1 U (http://www.xmlspy.com) by Merce Crosas (Harvard) --><!-- updated by asone --><xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="http://gking.harvard.edu/zelig" targetNamespace="http://gking.harvard.edu/zelig" elementFormDefault="qualified" attributeFormDefault="unqualified" version="1.1">	<xs:simpleType name="MODEL">		<xs:restriction base="xs:string">			<xs:enumeration value="continuous"/>			<xs:enumeration value="discrete"/>			<xs:enumeration value="nominal"/>			<xs:enumeration value="ordinal"/>			<xs:enumeration value="binary"/>		</xs:restriction>	</xs:simpleType>	<xs:simpleType name="DATA">		<xs:restriction base="xs:string">			<xs:enumeration value="factor"/>			<xs:enumeration value="integer"/>			<xs:enumeration value="real"/>			<xs:enumeration value="character"/>		</xs:restriction>	</xs:simpleType>	<xs:simpleType name="MAXSETX">		<xs:restriction base="xs:integer">			<xs:minInclusive value="0"/>			<xs:maxInclusive value="2"/>		</xs:restriction>	</xs:simpleType>	<xs:simpleType name="PACK_REL">		<xs:restriction base="xs:string">			<xs:enumeration value="required"/>			<xs:enumeration value="suggested"/>		</xs:restriction>	</xs:simpleType>	<xs:element name="zelig">		<xs:complexType>			<xs:sequence>				<xs:element name="model" maxOccurs="unbounded">					<xs:complexType>						<xs:sequence>							<xs:element name="description" type="xs:string"/>							<xs:element name="helpLink">								<xs:complexType>									<xs:attribute name="url" type="xs:anyURI" use="required"/>									<xs:attribute name="rhelp" type="xs:string" use="optional"/>								</xs:complexType>							</xs:element>							<xs:element name="packageDependency" minOccurs="0" maxOccurs="unbounded">								<xs:complexType>									<xs:attribute name="name" type="xs:string" use="required"/>									<xs:attribute name="version" type="xs:string" use="required"/>									<xs:attribute name="relationship" type="PACK_REL" use="optional" default="required"/>									<xs:attribute name="CRAN" type="xs:anyURI" use="optional"/>								</xs:complexType>							</xs:element>							<xs:element name="formula">								<xs:complexType>									<xs:sequence>										<xs:element name="equation" maxOccurs="unbounded">											<xs:complexType>												<xs:sequence>													<xs:element name="outcome" maxOccurs="unbounded">														<xs:complexType>															<xs:sequence>																<xs:element name="modelingType" minOccurs="0" maxOccurs="unbounded">																	<xs:complexType>																		<xs:simpleContent>																			<xs:extension base="MODEL"/>																		</xs:simpleContent>																	</xs:complexType>																</xs:element>																<xs:element name="dataType" minOccurs="0" maxOccurs="unbounded">																	<xs:complexType>																		<xs:simpleContent>																			<xs:extension base="DATA"/>																		</xs:simpleContent>																	</xs:complexType>																</xs:element>															</xs:sequence>															<xs:attribute name="minEquations" type="xs:positiveInteger" use="optional" default="1"/>															<xs:attribute name="maxEquations" type="xs:positiveInteger" use="optional" default="1"/>															<xs:attribute name="minVar" type="xs:nonNegativeInteger" use="optional" default="1"/>															<xs:attribute name="maxVar" type="xs:integer" use="optional" default="1"/>															<xs:attribute name="label" type="xs:string" use="optional"/>														</xs:complexType>													</xs:element>													<xs:element name="explanatory" minOccurs="0" maxOccurs="unbounded">														<xs:complexType>															<xs:sequence>																<xs:element name="modelingType" minOccurs="0" maxOccurs="unbounded">																	<xs:complexType>																		<xs:simpleContent>																			<xs:extension base="MODEL"/>																		</xs:simpleContent>																	</xs:complexType>																</xs:element>																<xs:element name="dataType" minOccurs="0" maxOccurs="unbounded">																	<xs:complexType>																		<xs:simpleContent>																			<xs:extension base="DATA"/>																		</xs:simpleContent>																	</xs:complexType>																</xs:element>															</xs:sequence>															<xs:attribute name="minVar" type="xs:nonNegativeInteger" use="optional" default="1"/>															<xs:attribute name="maxVar" type="xs:integer" use="optional" default="-1"/>															<xs:attribute name="label" type="xs:string" use="optional"/>														</xs:complexType>													</xs:element>												</xs:sequence>												<xs:attribute name="name" type="xs:string" use="optional"/>												<xs:attribute name="interceptAllowed" type="xs:boolean" use="optional" default="1"/>												<xs:attribute name="crossedAllowed" type="xs:boolean" use="optional" default="1"/>												<xs:attribute name="nestedAllowed" type="xs:boolean" use="optional" default="1"/>											</xs:complexType>										</xs:element>									</xs:sequence>									<xs:attribute name="minEquations" type="xs:positiveInteger" use="optional" default="1"/>									<xs:attribute name="maxEquations" type="xs:positiveInteger" use="optional" default="1"/>									<xs:attribute name="simulEq" type="xs:boolean" use="optional" default="0"/>								</xs:complexType>							</xs:element>							<xs:element name="setx">								<xs:complexType>									<xs:attribute name="maxSetx" type="MAXSETX" use="optional" default="2"/>								</xs:complexType>							</xs:element>						</xs:sequence>						<xs:attribute name="name" type="xs:string" use="required"/>						<xs:attribute name="label" type="xs:string" use="optional"/>						<xs:attribute name="specialFunction" type="xs:string" use="optional"/>					</xs:complexType>				</xs:element>			</xs:sequence>			<xs:attribute name="version" type="xs:string" use="optional"/>		</xs:complexType>	</xs:element></xs:schema>