targetNamespace="http://nvd.nist.gov/feeds/cve/1.2"

	xmlns:cve="http://nvd.nist.gov/feeds/cve/1.2"

	elementFormDefault="qualified" attributeFormDefault="unqualified"

	version="1.2">

	<xs:annotation>

		<xs:documentation>This schema defines the structure of the National

			Vulnerability Database XML feed files version: 1.2. The elements and

			attribute in this document are described by xs:annotation tags. This

			file is kept at http://nvd.nist.gov/schema/nvdcve.xsd. The NVD XML

			feeds are available at http://nvd.nist.gov/download.cfm.

			Release Notes:

			Version 1.2:

			* CVSS version 2 scores and vectors have been added.  Please see

			http://nvd.nist.gov/cvss.cfm?vectorinfo and

			http://www.first.org/cvss/cvss-guide.html for more information on

			how to interpret this data. </xs:documentation>

	</xs:annotation>

	<xs:element name="nvd">

		<xs:annotation>

			<xs:documentation>The root element of the NVD CVE feed. Multiple "entry" child elements describe specific NVD CVE entries.</xs:documentation>

		</xs:annotation>

		<xs:complexType>

			<xs:sequence>

				<xs:element ref="cve:entry" minOccurs="0" maxOccurs="unbounded"/>

			</xs:sequence>

			<xs:attribute name="nvd_xml_version" type="xs:NMTOKEN" use="required">

				<xs:annotation>

					<xs:documentation>The schema version number supported by the feed.</xs:documentation>

				</xs:annotation>

			</xs:attribute>

			<xs:attribute name="pub_date" type="cve:dateType" use="required">

				<xs:annotation>

					<xs:documentation>The date the feed was generated.</xs:documentation>

				</xs:annotation>

			</xs:attribute>

		</xs:complexType>

	</xs:element>

	<xs:element name="entry" type="cve:entryType">

		<xs:annotation>

			<xs:documentation>A CVE entry.</xs:documentation>

		</xs:annotation>

	</xs:element>

	<xs:complexType name="entryType">

		<xs:annotation>

			<xs:documentation> Documents one CVE entry. The child elements should always

				appear in the sequence defined below. These elements are compatible with

				entry elements from the CVE XML feeds.</xs:documentation>

		</xs:annotation>

		<xs:sequence>

			<xs:element name="desc">

				<xs:annotation>

					<xs:documentation>Description wrapper tag, parent to any

						documented descriptions of this CVE entry. While the "desc"

						tag will always be present, there may be no "descript" child

						tags. Only one "descript" tag will exist for each

						description source (i.e. CVE, NVD, ...). </xs:documentation>

				</xs:annotation>

				<xs:complexType>

					<xs:sequence>

						<xs:element name="descript" type="cve:descriptType" minOccurs="0" maxOccurs="2">

							<xs:annotation>

								<xs:documentation>A description of a CVE entry

									from the source indicated by the "source"

									attribute.</xs:documentation>

							</xs:annotation>

						</xs:element>

					</xs:sequence>

				</xs:complexType>

			</xs:element>

			<xs:element name="impacts" minOccurs="0">

				<xs:annotation>

					<xs:documentation> Impact wrapper tag (may or may not be

						present). Only one "impact" tag will exist for each impact

						explanation source. </xs:documentation>

				</xs:annotation>

				<xs:complexType>

					<xs:sequence>

						<xs:element name="impact" type="cve:impactType">

							<xs:annotation>

								<xs:documentation> Contains a specific impact

								explanation of this CVE entry from source

								indicated by the "source" attribute.

								</xs:documentation>

							</xs:annotation>

						</xs:element>

					</xs:sequence>

				</xs:complexType>

			</xs:element>

			<xs:element name="sols" type="cve:solsType" minOccurs="0">

				<xs:annotation>

					<xs:documentation> Solution wrapper tag (may or may not be

						present). Only one "sol" tag will exist for each solution

						explanation source. </xs:documentation>

				</xs:annotation>

			</xs:element>

			<xs:element name="loss_types" type="cve:lossTypeType" minOccurs="0">

				<xs:annotation>

					<xs:documentation> Loss type tag (may or may not be present).

						Contains one loss type child for each loss type of this CVE

						entry. Potential loss types are: "avail" => availability

						"conf" => confidentiality "int" => integrity "sec_prot" =>

						security protection </xs:documentation>

				</xs:annotation>

			</xs:element>

			<xs:element name="vuln_types" type="cve:vulnType" minOccurs="0">

				<xs:annotation>

					<xs:documentation> Vulnerability type tag (may or may not be

						present). Contains one vulnerability type child for each

						vulnerability type of this CVE entry. Potential

						vulnerability types are: "access" => Access validation error

						"input" => Input validation error "design" => Design error

						"exception" => Exceptional condition error "env" =>

						Environmental error "config" => Configuration error "race"

						=> Race condition error "other" => other </xs:documentation>

				</xs:annotation>

			</xs:element>

			<xs:element name="range" type="cve:rangeType" minOccurs="0">

				<xs:annotation>

					<xs:documentation> Vulnerability range tag (may or may not be

						present). Contains one vulnerability range child for each

						vulnerability range of this CVE entry. Potential

						vulnerability ranges are: "local" => Locally exploitable

						"local_network" => Local network exploitable "network" =>

						Network exploitable "user_init" => User accesses attacker

					</xs:documentation>

				</xs:annotation>

			</xs:element>

			<xs:element name="refs">

				<xs:annotation>

					<xs:documentation> Reference wrapper tag (always present).

						External references to this CVE entry are contained within

						this tag. </xs:documentation>

				</xs:annotation>

				<xs:complexType>

					<xs:sequence>

						<xs:element name="ref" type="cve:refType" minOccurs="0" maxOccurs="unbounded">

							<xs:annotation>

								<xs:documentation> Individual reference to this CVE

								entry. Text is the name of this vulnerability at

								this particular reference. Attributes: "source"

								(required) => Name of reference source "url"

								(required) => hyperlink to reference "sig" =>

								indicates this reference includes a tool

								signature "adv" => indicates this reference is a

								Security Advisory "patch" => indicates this

								reference includes a patch for this

								vulnerability </xs:documentation>

							</xs:annotation>

						</xs:element>

					</xs:sequence>

				</xs:complexType>

			</xs:element>

			<xs:element name="vuln_soft" type="cve:vulnSoftType" minOccurs="0">

				<xs:annotation>

					<xs:documentation> Vulnerable software wrapper tag (may or may

						not be present). Software affected by this CVE entry are

						listed within this tag. </xs:documentation>

				</xs:annotation>

			</xs:element>

		</xs:sequence>

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

			<xs:annotation>

				<xs:documentation>CVE or CAN</xs:documentation>

			</xs:annotation>

			<xs:simpleType>

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

					<xs:enumeration value="CAN"/>

					<xs:enumeration value="CVE"/>

				</xs:restriction>

			</xs:simpleType>

		</xs:attribute>

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

			<xs:annotation>

				<xs:documentation>the full CVE name</xs:documentation>

			</xs:annotation>

			<xs:simpleType>

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

					<xs:pattern value="(CAN|CVE)\-\d\d\d\d\-\d\d\d\d"/>

				</xs:restriction>

			</xs:simpleType>

		</xs:attribute>

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

			<xs:annotation>

				<xs:documentation>the sequence number from CVE name</xs:documentation>

			</xs:annotation>

			<xs:simpleType>

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

					<xs:pattern value="\d\d\d\d\-\d\d\d\d"/>

				</xs:restriction>

			</xs:simpleType>

		</xs:attribute>

		<xs:attribute name="nvd_name" type="xs:string">

			<xs:annotation>

				<xs:documentation>the NVD name (if it exists)</xs:documentation>

			</xs:annotation>

		</xs:attribute>

		<xs:attribute name="discovered" type="cve:dateType">

			<xs:annotation>

				<xs:documentation>the date this entry was discovered</xs:documentation>

			</xs:annotation>

		</xs:attribute>

		<xs:attribute name="published" type="cve:dateType" use="required">

			<xs:annotation>

				<xs:documentation>the date this entry was published</xs:documentation>

			</xs:annotation>

		</xs:attribute>

		<xs:attribute name="modified" type="cve:dateType">

			<xs:annotation>

				<xs:documentation>the date this entry was last modified</xs:documentation>

			</xs:annotation>

		</xs:attribute>

		<xs:attribute name="severity">

			<xs:annotation>

				<xs:documentation>the entry's severity as determined by the NVD analysts: High, Medium, or Low</xs:documentation>

			</xs:annotation>

			<xs:simpleType>

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

					<xs:enumeration value="High"/>

					<xs:enumeration value="Medium"/>

					<xs:enumeration value="Low"/>

				</xs:restriction>

			</xs:simpleType>

		</xs:attribute>

		<xs:attribute name="reject" type="cve:trueOnlyAttribute">

			<xs:annotation>

				<xs:documentation>indicates that this CVE entry has been rejected by CVE or NVD</xs:documentation>

			</xs:annotation>

		</xs:attribute>

		<xs:attribute name="CVSS_version" type="xs:string">

			<xs:annotation>

				<xs:documentation>the CVSS Version Indicator</xs:documentation>

			</xs:annotation>

		</xs:attribute>

		<xs:attribute name="CVSS_score" type="cve:zeroToTen">

			<xs:annotation>

				<xs:documentation>Same as the CVSS_base_score to provide backwards compatability with the previous CVE XML feed format. This field is deprecated an may be removed at a future date.</xs:documentation>

			</xs:annotation>

		</xs:attribute>

		<xs:attribute name="CVSS_base_score" type="cve:zeroToTen">

			<xs:annotation>

				<xs:documentation>CVSS version 2 Base Score</xs:documentation>

			</xs:annotation>

		</xs:attribute>

		<xs:attribute name="CVSS_impact_subscore" type="cve:zeroToTen">

			<xs:annotation>

				<xs:documentation>CVSS version 2 Impact Score</xs:documentation>

			</xs:annotation>

		</xs:attribute>

		<xs:attribute name="CVSS_exploit_subscore" type="cve:zeroToTen">

			<xs:annotation>

				<xs:documentation>CVSS version 2 Exploit Score</xs:documentation>

			</xs:annotation>

		</xs:attribute>

		<xs:attribute name="CVSS_vector" type="cve:CVSSVector">

			<xs:annotation>

				<xs:documentation>the CVSS version 2 Vector string</xs:documentation>

			</xs:annotation>

		</xs:attribute>

	</xs:complexType>

	<xs:complexType name="descriptType">

		<xs:simpleContent>

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

				<xs:attribute name="source" type="cve:descriptSourceType" use="required">

					<xs:annotation>

						<xs:documentation>The source of the CVE description.</xs:documentation>

					</xs:annotation>

				</xs:attribute>

			</xs:extension>

		</xs:simpleContent>

	</xs:complexType>

	<xs:complexType name="impactType">

		<xs:simpleContent>

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

				<xs:attribute name="source" type="cve:impactSourceType" use="required">

				</xs:attribute>

			</xs:extension>

		</xs:simpleContent>

	</xs:complexType>

	<xs:complexType name="vulnType">

		<xs:sequence>

			<xs:element name="access" minOccurs="0"/>

			<xs:element name="input" minOccurs="0">

				<xs:annotation>

					<xs:documentation> Input validation error tag with

						one attribute for each input validation error

						type. Potential input validation error types

						are: "bound" => Boundary condition error

						"buffer" => Buffer overflow </xs:documentation>

				</xs:annotation>

				<xs:complexType>

					<xs:attribute name="bound" type="cve:trueOnlyAttribute"/>

					/>

				</xs:complexType>

			</xs:element>

			<xs:element name="design" minOccurs="0"/>

			<xs:element name="exception" minOccurs="0"/>

			<xs:element name="env" minOccurs="0"/>

			<xs:element name="config" minOccurs="0"/>

			<xs:element name="race" minOccurs="0"/>

			<xs:element name="other" minOccurs="0"/>

		</xs:sequence>

	</xs:complexType>

	<xs:complexType name="solsType">

		<xs:sequence>

			<xs:element name="sol">

				<xs:annotation>

					<xs:documentation> Contains a specific solution

						explanation of this CVE entry from source

						indicated by the "source" attribute.

					</xs:documentation>

				</xs:annotation>

				<xs:complexType mixed="true">

					<xs:simpleContent>

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

							<xs:attribute name="source" type="cve:solsSourceType" use="required">

							</xs:attribute>

						</xs:extension>

					</xs:simpleContent>

				</xs:complexType>

			</xs:element>

		</xs:sequence>

	</xs:complexType>

	<xs:complexType name="lossTypeType">

		<xs:sequence>

			<xs:element name="avail" minOccurs="0"/>

			<xs:element name="conf" minOccurs="0"/>

			<xs:element name="int" minOccurs="0"/>

			<xs:element name="sec_prot" minOccurs="0">

				<xs:annotation>

					<xs:documentation> Security Protection tag with one

						attribute for each security protection type.

						Potential security protection types are: "admin"

						=> gain administrative access "user" => gain

						user access "other" => other </xs:documentation>

				</xs:annotation>

				<xs:complexType>

					<xs:attribute name="admin" type="cve:trueOnlyAttribute"/>

					<xs:attribute name="user" type="cve:trueOnlyAttribute"/>

					/>

				</xs:complexType>

			</xs:element>

		</xs:sequence>

	</xs:complexType>

	<xs:complexType name="rangeType">

		<xs:sequence>

			<xs:element name="local" minOccurs="0"/>

			<xs:element name="local_network" minOccurs="0"/>

			<xs:element name="network" minOccurs="0"/>

			<xs:element name="user_init" minOccurs="0"/>

		</xs:sequence>

	</xs:complexType>

	<xs:complexType name="refType">

		<xs:simpleContent>

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

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

				<xs:attribute name="url" type="cve:urlType" use="required"/>

				<xs:attribute name="sig" type="cve:trueOnlyAttribute"/>

				<xs:attribute name="adv" type="cve:trueOnlyAttribute"/>

				<xs:attribute name="patch" type="cve:trueOnlyAttribute"/>

			</xs:extension>

		</xs:simpleContent>

	</xs:complexType>

	<xs:complexType name="vulnSoftType">

		<xs:sequence>

			<xs:element name="prod" maxOccurs="unbounded">

				<xs:annotation>

					<xs:documentation> Product wrapper tag. Versions of

						this product that are affected by this

						vulnerability are listed within this tag.

						Attributes: "name" => Product name "vendor" =>

						Vendor of this product </xs:documentation>

				</xs:annotation>

				<xs:complexType>

					<xs:sequence>

						<xs:element name="vers" maxOccurs="unbounded">

							<xs:annotation>

								<xs:documentation> Represents a version

									of this product that is affected by

									this vulnerability. Attributes:

									"num" => This version number "prev"

									=> Indicates that versions previous

									to this version number are also

									affected by this vulnerability

									"edition" => Indicates the edition

									associated with the version number

								</xs:documentation>

							</xs:annotation>

							<xs:complexType>

									type="xs:string" use="required"/>

									type="cve:trueOnlyAttribute"/>

									type="xs:string"/>

							</xs:complexType>

						</xs:element>

					</xs:sequence>

						use="required"/>

						use="required"/>

				</xs:complexType>

			</xs:element>

		</xs:sequence>

	</xs:complexType>

	<xs:simpleType name="descriptSourceType">

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

			<xs:enumeration value="cve"/>

			<xs:enumeration value="nvd"/>

		</xs:restriction>

	</xs:simpleType>

	<xs:simpleType name="impactSourceType">

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

			<xs:enumeration value="nvd"/>

		</xs:restriction>

	</xs:simpleType>

	<xs:simpleType name="solsSourceType">

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

			<xs:enumeration value="nvd"/>

		</xs:restriction>

	</xs:simpleType>

	<xs:simpleType name="dateType">

		<xs:annotation>

			<xs:documentation> Defines date format for NVD. Dates follow the mask "yyyy-mm-dd"

			</xs:documentation>

		</xs:annotation>

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

				value="(19|20)\d\d-((01|03|05|07|08|10|12)-(0[1-9]|[1-2]\d|3[01])|(04|06|09|11)-(0[1-9]|[1-2]\d|30)|02-(0[1-9]|1\d|2\d))"

			/>

		</xs:restriction>

	</xs:simpleType>

	<xs:simpleType name="urlType">

		<xs:annotation>

			<xs:documentation> Restricts urls in NVD beyond the xs:anyURI restrictions.

			</xs:documentation>

		</xs:annotation>

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

			<xs:whiteSpace value="collapse"/>

			<xs:pattern value="(news|(ht|f)tp(s)?)://.+"/>

		</xs:restriction>

	</xs:simpleType>

	<xs:simpleType name="trueOnlyAttribute">

		<xs:annotation>

			<xs:documentation> simpleType used for attributes that are only present when they are

				true. Such attributes appear only in the form attribute_name="1".

			</xs:documentation>

		</xs:annotation>

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

			<xs:enumeration value="1"/>

		</xs:restriction>

	</xs:simpleType>

	<xs:simpleType name="zeroToTen">

		<xs:annotation>

			<xs:documentation> simpleType used when scoring on a scale of 0-10, inclusive

			</xs:documentation>

		</xs:annotation>

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

			<xs:minInclusive value="0" fixed="true"/>

			<xs:maxInclusive value="10" fixed="true"/>

		</xs:restriction>

	</xs:simpleType>

	<xs:simpleType name="CVSSVector">

		<xs:annotation>

			<xs:documentation>simpleType to describe the CVSS Base Vector </xs:documentation>

		</xs:annotation>

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

				value="\(AV:[LAN]/AC:[HML]/Au:[NSM]/C:[NPC]/I:[NPC]/A:[NPC]\)"/>

		</xs:restriction>

	</xs:simpleType>

</xs:schema>