<?xml version="1.0" encoding="UTF-8"?>
<!--
COPYRIGHT
*****************************************************************
Copyright 2012 EMBL - European Bioinformatics Institute
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on
an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
*****************************************************************

This is a XML schema for checking entry-specific validation
XML documents from wwPDB.

$Author: swanand $
$Revision: 22638 $
*****************************************************************
-->

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

<xsd:simpleType name="BfactorType">
	<xsd:restriction base="xsd:string">
		<xsd:enumeration value="PARTIAL"/>
		<xsd:enumeration value="FULL"/>
	</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="YesString">
	<xsd:restriction base="xsd:string">
		<xsd:enumeration value="yes"/>
	</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="TrueString">
	<xsd:restriction base="xsd:string">
		<xsd:enumeration value="true"/>
	</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="NotAvailable">
	<xsd:restriction base="xsd:string">
		<xsd:enumeration value="NotAvailable"/>
	</xsd:restriction>
</xsd:simpleType>
<xsd:simpleType name="floatORunavailable">
	<xsd:union memberTypes="xsd:decimal NotAvailable"/>
</xsd:simpleType>

<xsd:element name="wwPDB-validation-information">
	<xsd:complexType mixed="true">
		<xsd:sequence>
			<xsd:element name="Entry" minOccurs="1" maxOccurs="1">
				<xsd:complexType>
					<xsd:attribute name="CCP4version" type="xsd:string" use="optional"/> <!-- 20 chars -->
					<xsd:attribute name="DataAnisotropy" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="CA_ONLY" type="xsd:string" use="optional"/> <!-- 5 chars -->
					<xsd:attribute name="B_factor_type" type="BfactorType" use="optional"/> <!-- 10 chars -->
					<xsd:attribute name="XMLcreationDate" type="xsd:string" use="optional"/> <!-- 30 chars -->
					<xsd:attribute name="pdbid" type="xsd:string" use="optional"/> <!-- 10 chars -->
					<xsd:attribute name="DataCompleteness" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="DCC_R" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="DCC_Rfree" type="floatORunavailable" use="optional"/> <!-- -->
					<xsd:attribute name="DCC_refinement_program" type="xsd:string" use="optional"/> <!-- 20 chars -->
					<xsd:attribute name="num-free-reflections" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="percent-free-reflections" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="EDS_R" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="EDS_resolution" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="EDS_resolution_low" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="resol-high-from-reflectionsfile" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="resol-low-from-reflectionsfile" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="no-percentile-property" type="TrueString" use="optional"/> <!-- -->
					<xsd:attribute name="Fo_Fc_correlation" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="IoverSigma" type="xsd:string" use="optional"/> <!-- 20 chars -->
					<xsd:attribute name="PDB-revision-number" type="xsd:decimal" use="required"/> <!-- -->
					<xsd:attribute name="RNAsuiteness" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="RefmacVersion" type="xsd:string" use="optional"/> <!-- 10 chars -->
					<xsd:attribute name="RestypesNotcheckedForBondAngleGeometry" type="xsd:string" use="optional"/> <!-- unpredictable... 50 chars -->
					<xsd:attribute name="no-ligands-for-mogul" type="xsd:string" use="optional"/> <!-- 5 chars -->
					<xsd:attribute name="TransNCS" type="xsd:string" use="optional"/> <!-- 200 chars -->
					<xsd:attribute name="TwinL" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="TwinL2" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="TwinFraction" type="xsd:string" use="optional"/> <!-- unpredictable... 50 chars -->
					<xsd:attribute name="WilsonBaniso" type="xsd:string" use="optional"/> <!-- 40 chars -->
					<xsd:attribute name="WilsonBestimate" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="absolute-percentile-DCC_Rfree" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="absolute-percentile-RNAsuiteness" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="absolute-percentile-clashscore" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="absolute-percentile-percent-RSRZ-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="absolute-percentile-percent-rama-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="absolute-percentile-percent-rota-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="absolute-percentile-percent-calpha-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="relative-percentile-DCC_Rfree" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="relative-percentile-RNAsuiteness" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="relative-percentile-clashscore" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="relative-percentile-percent-RSRZ-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="relative-percentile-percent-rama-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="relative-percentile-percent-rota-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="relative-percentile-percent-calpha-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-absolute-percentile-percent-rota-outliers" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-relative-percentile-percent-rota-outliers" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="low-resol-relative-percentile-percent-rota-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="high-resol-relative-percentile-percent-rota-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-absolute-percentile-clashscore" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-relative-percentile-clashscore" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="low-resol-relative-percentile-clashscore" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="high-resol-relative-percentile-clashscore" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-absolute-percentile-DCC_Rfree" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-relative-percentile-DCC_Rfree" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="low-resol-relative-percentile-DCC_Rfree" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="high-resol-relative-percentile-DCC_Rfree" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-absolute-percentile-percent-RSRZ-outliers" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-relative-percentile-percent-RSRZ-outliers" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="low-resol-relative-percentile-percent-RSRZ-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="high-resol-relative-percentile-percent-RSRZ-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-absolute-percentile-percent-rama-outliers" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-relative-percentile-percent-rama-outliers" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="low-resol-relative-percentile-percent-rama-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="high-resol-relative-percentile-percent-rama-outliers" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-absolute-percentile-RNAsuiteness" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-relative-percentile-RNAsuiteness" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-absolute-percentile-percent-calpha-outliers" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="numPDBids-relative-percentile-percent-calpha-outliers" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="low-resol-relative-percentile-RNAsuiteness" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="high-resol-relative-percentile-RNAsuiteness" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="coordinatesInputFilename" type="xsd:string" use="optional"/> <!-- unpredictable... 30 chars -->
					<xsd:attribute name="reflectionsInputFilename" type="xsd:string" use="optional"/> <!-- unpredictable... 30 chars -->
					<xsd:attribute name="acentric_outliers" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="attemptedValidationSteps" type="xsd:string" use="required"/> <!-- 100 chars -->
					<xsd:attribute name="xtriage_input_columns" type="xsd:string" use="optional"/> <!-- 50 chars -->
					<xsd:attribute name="bulk_solvent_b" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="bulk_solvent_k" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="centric_outliers" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="clashscore" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="num-H-reduce" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="numMillerIndices" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="percent-RSRZ-outliers" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="percent-rama-outliers" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="percent-rota-outliers" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="percent-calpha-outliers" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="angles_rmsz" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="bonds_rmsz" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="num_bonds_rmsz" type="xsd:integer" use="optional"/>
					<xsd:attribute name="num_angles_rmsz" type="xsd:integer" use="optional"/>
				</xsd:complexType>
			</xsd:element> <!-- Entry ends -->
			<xsd:element name="ModelledSubgroup" minOccurs="0" maxOccurs="unbounded">
				<xsd:complexType>
					<xsd:sequence>
						<xsd:choice minOccurs="0" maxOccurs="unbounded">
							<xsd:element name="mog-ring-outlier" minOccurs="0" maxOccurs="unbounded">
								<xsd:complexType>
									<xsd:attribute name="atoms" type="xsd:string" use="required"/> <!-- unpredictable... 50 chars -->
									<xsd:attribute name="mean" type="xsd:decimal" use="required"/>
									<xsd:attribute name="mindiff" type="xsd:decimal" use="required"/>
									<xsd:attribute name="stdev" type="xsd:decimal" use="required"/>
									<xsd:attribute name="numobs" type="xsd:decimal" use="required"/>
								</xsd:complexType>
							</xsd:element>
							<xsd:element name="mog-angle-outlier" minOccurs="0" maxOccurs="unbounded">
								<xsd:complexType>
									<xsd:attribute name="atoms" type="xsd:string" use="required"/> <!-- 15 chars -->
									<xsd:attribute name="mean" type="xsd:decimal" use="required"/>
									<xsd:attribute name="stdev" type="xsd:decimal" use="required"/>
									<xsd:attribute name="numobs" type="xsd:decimal" use="required"/>
									<xsd:attribute name="Zscore" type="xsd:decimal" use="required"/>
									<xsd:attribute name="mindiff" type="xsd:decimal" use="required"/>
									<xsd:attribute name="obsval" type="xsd:decimal" use="required"/>
								</xsd:complexType>
							</xsd:element>
							<xsd:element name="mog-torsion-outlier" minOccurs="0" maxOccurs="unbounded">
								<xsd:complexType>
									<xsd:attribute name="atoms" type="xsd:string" use="required"/> <!-- 20 chars -->
									<xsd:attribute name="mean" type="xsd:decimal" use="required"/>
									<xsd:attribute name="mindiff" type="xsd:decimal" use="required"/>
									<xsd:attribute name="numobs" type="xsd:decimal" use="required"/>
									<xsd:attribute name="stdev" type="xsd:decimal" use="required"/>
									<xsd:attribute name="obsval" type="xsd:decimal" use="required"/>
								</xsd:complexType>
							</xsd:element>
							<xsd:element name="mog-bond-outlier" minOccurs="0" maxOccurs="unbounded">
								<xsd:complexType>
									<xsd:attribute name="atoms" type="xsd:string" use="required"/> <!-- 10 chars -->
									<xsd:attribute name="mean" type="xsd:decimal" use="required"/>
									<xsd:attribute name="stdev" type="xsd:decimal" use="required"/>
									<xsd:attribute name="numobs" type="xsd:decimal" use="required"/>
									<xsd:attribute name="Zscore" type="xsd:decimal" use="required"/>
									<xsd:attribute name="mindiff" type="xsd:decimal" use="required"/>
									<xsd:attribute name="obsval" type="xsd:decimal" use="required"/>
								</xsd:complexType>
							</xsd:element>
							<xsd:element name="chiral-outlier" minOccurs="0" maxOccurs="unbounded">
								<xsd:complexType>
									<xsd:attribute name="problem" type="xsd:string" use="optional"/> <!-- 10 chars -->
									<xsd:attribute name="atom" type="xsd:string" use="optional"/> <!-- 5 chars -->
								</xsd:complexType>
							</xsd:element>
							<xsd:element name="plane-outlier" minOccurs="0" maxOccurs="unbounded">
								<xsd:complexType>
									<xsd:attribute name="omega" type="xsd:string" use="optional"/> <!-- 5 chars TODO --> 
									<xsd:attribute name="improper" type="xsd:string" use="optional"/> <!-- 5 chars TODO -->
									<xsd:attribute name="planeRMSD" type="xsd:decimal" use="optional"/>
									<xsd:attribute name="type" type="xsd:string" use="required"/> <!-- 15 chars -->
								</xsd:complexType>
							</xsd:element>
							<xsd:element name="bond-outlier" minOccurs="0" maxOccurs="unbounded">
								<xsd:complexType>
									<xsd:attribute name="atom0" type="xsd:string" use="required"/> <!-- 5 chars -->
									<xsd:attribute name="atom1" type="xsd:string" use="required"/> <!-- 5 chars -->
									<xsd:attribute name="mean" type="xsd:decimal" use="required"/>
									<xsd:attribute name="stdev" type="xsd:decimal" use="required"/>
									<xsd:attribute name="obs" type="xsd:decimal" use="required"/>
									<xsd:attribute name="z" type="xsd:decimal" use="required"/>
									<xsd:attribute name="link" type="YesString" use="optional"/>
								</xsd:complexType>
							</xsd:element>
							<xsd:element name="angle-outlier" minOccurs="0" maxOccurs="unbounded">
								<xsd:complexType>
									<xsd:attribute name="atom0" type="xsd:string" use="required"/> <!-- 5 chars -->
									<xsd:attribute name="atom1" type="xsd:string" use="required"/> <!-- 5 chars -->
									<xsd:attribute name="atom2" type="xsd:string" use="required"/> <!-- 5 chars -->
									<xsd:attribute name="mean" type="xsd:decimal" use="required"/>
									<xsd:attribute name="stdev" type="xsd:decimal" use="required"/>
									<xsd:attribute name="obs" type="xsd:decimal" use="required"/>
									<xsd:attribute name="z" type="xsd:decimal" use="required"/>
									<xsd:attribute name="link" type="YesString" use="optional"/>
								</xsd:complexType>
							</xsd:element>
							<xsd:element name="symm-clash" minOccurs="0" maxOccurs="unbounded">
								<xsd:complexType>
									<xsd:attribute name="atom" type="xsd:string" use="required"/> <!-- 5 chars -->
									<xsd:attribute name="symop" type="xsd:string" use="required"/> <!-- 15 chars -->
									<xsd:attribute name="scid" type="xsd:integer" use="required"/>
									<xsd:attribute name="clashmag" type="xsd:decimal" use="required"/>
									<xsd:attribute name="dist" type="xsd:decimal" use="required"/>
								</xsd:complexType>
							</xsd:element>
							<xsd:element name="clash" minOccurs="0" maxOccurs="unbounded">
								<xsd:complexType>
									<xsd:attribute name="atom" type="xsd:string" use="required"/> <!-- 5 chars -->
									<xsd:attribute name="cid" type="xsd:integer" use="required"/>
									<xsd:attribute name="clashmag" type="xsd:decimal" use="required"/>
									<xsd:attribute name="dist" type="xsd:decimal" use="required"/>
								</xsd:complexType>
							</xsd:element>
						</xsd:choice>
					</xsd:sequence>
					<xsd:attribute name="chain" type="xsd:string" use="required"/> <!-- 5 chars -->
					<xsd:attribute name="resnum" type="xsd:string" use="required"/> <!-- 10 chars -->
					<xsd:attribute name="resname" type="xsd:string" use="required"/> <!-- 5 chars -->
					<xsd:attribute name="model" type="xsd:string" use="required"/> <!-- 10 chars -->
					<xsd:attribute name="altcode" type="xsd:string" use="required"/> <!-- 3 chars -->
					<xsd:attribute name="icode" type="xsd:string" use="required"/> <!-- 3 chars -->
					<xsd:attribute name="ent" type="xsd:string" use="required"/> <!-- 5 chars -->
					<xsd:attribute name="said" type="xsd:string" use="required"/> <!-- 5 chars -->
					<xsd:attribute name="seq" type="xsd:string" use="required"/> <!-- 10 chars -->
					<xsd:attribute name="NatomsEDS" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="rsr" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="rscc" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="rsrz" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="owab" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="avgoccu" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="ligRSRnbrMean" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="ligRSRnbrStdev" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="ligRSRnumnbrs" type="xsd:integer" use="optional"/> <!-- -->
					<xsd:attribute name="ligRSRZ" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="num-H-reduce" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="rama" type="xsd:string" use="optional"/> <!-- 10 chars -->
					<xsd:attribute name="rota" type="xsd:string" use="optional"/> <!-- 10 chars -->
					<xsd:attribute name="phi" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="psi" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="mogul-ignore" type="xsd:string" use="optional"/> <!-- 5 chars -->
					<xsd:attribute name="flippable-sidechain" type="xsd:string" use="optional"/> <!-- 5 chars -->
					<xsd:attribute name="RNAscore" type="xsd:decimal" use="optional"/> <!-- -->
					<xsd:attribute name="RNAsuite" type="xsd:string" use="optional"/> <!-- 15 chars -->
					<xsd:attribute name="RNApucker" type="xsd:string" use="optional"/> <!-- 10 chars -->
					<xsd:attribute name="CAangleStatus" type="xsd:string" use="optional"/> <!-- 8 chars -->
					<xsd:attribute name="delta" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="gamma" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="CAscore" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="mogul_angles_rmsz" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="mogul_bonds_rmsz" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="mogul_rmsz_numangles" type="xsd:integer" use="optional"/>
					<xsd:attribute name="mogul_rmsz_numbonds" type="xsd:integer" use="optional"/>
					<xsd:attribute name="ligand_geometry_outlier" type="YesString" use="optional"/>
					<xsd:attribute name="ligand_density_outlier" type="YesString" use="optional"/>
				</xsd:complexType>
			</xsd:element> <!-- ModelledSubgroup ends -->
			<xsd:element name="ModelledEntityInstance" minOccurs="0" maxOccurs="unbounded">
				<xsd:complexType>
					<xsd:attribute name="absolute_RSRZ_percentile" type="floatORunavailable" use="optional"/>
					<xsd:attribute name="relative_RSRZ_percentile" type="floatORunavailable" use="optional"/>
					<xsd:attribute name="absolute_rama_percentile" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="relative_rama_percentile" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="absolute_sidechain_percentile" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="relative_sidechain_percentile" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="angles_rmsz" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="bonds_rmsz" type="xsd:decimal" use="optional"/>
					<xsd:attribute name="num_bonds_rmsz" type="xsd:integer" use="optional"/>
					<xsd:attribute name="num_angles_rmsz" type="xsd:integer" use="optional"/>
					<xsd:attribute name="chain" type="xsd:string" use="required"/> <!-- 5 chars -->
					<xsd:attribute name="model" type="xsd:string" use="required"/> <!-- 10 chars -->
					<xsd:attribute name="said" type="xsd:string" use="required"/> <!-- 5 chars -->
					<xsd:attribute name="ent" type="xsd:string" use="required"/> <!-- 5 chars -->
				</xsd:complexType>
			</xsd:element> <!-- ModelledEntityInstance -->
			<xsd:element name="programs" minOccurs="1" maxOccurs="1">
				<xsd:complexType>
					<xsd:sequence>
						<xsd:element name="program" minOccurs="1" maxOccurs="unbounded">
							<xsd:complexType>
								<xsd:attribute name="name" type="xsd:string" use="required"/> <!-- 20 chars -->
								<xsd:attribute name="properties" type="xsd:string" use="required"/> <!-- unpredictable... 100 chars -->
								<xsd:attribute name="version" type="xsd:string" use="required"/> <!-- 20 chars -->
							</xsd:complexType>
						</xsd:element>
					</xsd:sequence>
				</xsd:complexType>
			</xsd:element> <!-- programs ends -->
		</xsd:sequence>
	</xsd:complexType>
</xsd:element> <!--wwPDB-validation-information ends-->

</xsd:schema>
