XML Schema Documentation

Table of Contents

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Schema Document Properties

Target Namespace None
Element and Attribute Namespaces
  • Global element and attribute declarations belong to this schema's target namespace.
  • By default, local element declarations belong to this schema's target namespace.
  • By default, local attribute declarations have no namespace.

Declared Namespaces

Prefix Namespace
xml http://www.w3.org/XML/1998/namespace
xs http://www.w3.org/2001/XMLSchema
Schema Component Representation
<xs:schema elementFormDefault="qualified" attributeFormDefault="unqualified">
...
</xs:schema>
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Global Declarations

Element: mzData

Name mzData
Type Locally-defined complex type
Nillable no
Abstract no
Documentation This schema can capture the use of a mass spectrometer, the data generated, and the initial processing of that data (to the level of the peak list). Peak lists are processed data from a mass spectrometry experiment. There can be multiple peak lists in an mzData file, which might be related via a separation, or just in sequence from an automated run. Any one peak list (mass spectrum) may also be composed of a number of acquisitions, which can be described individually herein.
XML Instance Representation
<mzData
version="1.05 [1] ?"
accessionNumber=" xs:string [1] ?">
<cvLookup> cvLookupType </cvLookup> [0..*] ?
<description> [1] ?
<admin> adminType </admin> [1] ?
<instrument> instrumentDescriptionType </instrument> [1] ?
<dataProcessing> dataProcessingType </dataProcessing> [1] ?
</description>
<spectrumList
count=" xs:int [1] ?"> [1] ?
<spectrum
id=" xs:int [1] ?"> [1..*] ?
<spectrumDesc> spectrumDescType </spectrumDesc> [1] ?
<supDesc> supDescType </supDesc> [0..*] ?
<mzArrayBinary> peakListBinaryType </mzArrayBinary> [1] ?
<intenArrayBinary> peakListBinaryType </intenArrayBinary> [1] ?
Start Choice [0..*] ?
<supDataArrayBinary> supDataBinaryType </supDataArrayBinary> [1] ?
<supDataArray> supDataType </supDataArray> [1] ?
End Choice
</spectrum>
</spectrumList>
</mzData>
Schema Component Representation
<xs:element name="mzData">
<xs:complexType>
<xs:sequence>
<xs:element name="cvLookup" type=" cvLookupType " minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="description">
<xs:complexType>
<xs:sequence>
<xs:element name="admin" type=" adminType "/>
<xs:element name="instrument" type=" instrumentDescriptionType "/>
<xs:element name="dataProcessing" type=" dataProcessingType "/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="spectrumList">
<xs:complexType>
<xs:sequence>
<xs:element name="spectrum" maxOccurs="unbounded">
<xs:complexType>
<xs:complexContent>
<xs:extension base=" spectrumType "/>
</xs:complexContent>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="count" type=" xs:int " use="required"/>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="version" type=" xs:string " use="required" fixed="1.05"/>
<xs:attribute name="accessionNumber" type=" xs:string " use="required"/>
</xs:complexType>
</xs:element>
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Global Definitions

Complex Type: adminType

Super-types: None
Sub-types: None
Name adminType
Abstract no
Documentation 'Header' information - sample description, contact details, comments
XML Instance Representation
<...>
<sampleName> xs:string </sampleName> [1] ?
<sampleDescription> descriptionType </sampleDescription> [0..1] ?
<sourceFile> sourceFileType </sourceFile> [0..1] ?
<contact> personType </contact> [1..*] ?
</...>
Schema Component Representation
<xs:complexType name="adminType">
<xs:sequence>
<xs:element name="sampleName" type=" xs:string "/>
<xs:element name="sampleDescription" type=" descriptionType " minOccurs="0"/>
<xs:element name="sourceFile" type=" sourceFileType " minOccurs="0"/>
<xs:element name="contact" type=" personType " maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
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Complex Type: cvLookupType

Super-types: None
Sub-types: None
Name cvLookupType
Abstract no
Documentation Information about an ontology/CV source and a short 'lookup' tag to refer to.
XML Instance Representation
<...
cvLabel=" xs:string [1] ?"
fullName=" xs:string [0..1] ?"
version=" xs:string [1] ?"
address=" xs:anyURI [1] ?"/>
Schema Component Representation
<xs:complexType name="cvLookupType">
<xs:attribute name="cvLabel" type=" xs:string " use="required"/>
<xs:attribute name="fullName" type=" xs:string " use="optional"/>
<xs:attribute name="version" type=" xs:string " use="required"/>
<xs:attribute name="address" type=" xs:anyURI " use="required"/>
</xs:complexType>
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Complex Type: cvParamType

Super-types: None
Sub-types: None
Name cvParamType
Abstract no
Documentation Parameters from a controlled vocbulary.
XML Instance Representation
<...
cvLabel=" xs:string [1] ?"
accession=" xs:string [1] ?"
name=" xs:string [1] ?"
value=" xs:string [0..1] ?"/>
Schema Component Representation
<xs:complexType name="cvParamType">
<xs:attribute name="cvLabel" type=" xs:string " use="required"/>
<xs:attribute name="accession" type=" xs:string " use="required"/>
<xs:attribute name="name" type=" xs:string " use="required"/>
<xs:attribute name="value" type=" xs:string " use="optional"/>
</xs:complexType>
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Complex Type: dataProcessingType

Super-types: None
Sub-types: None
Name dataProcessingType
Abstract no
Documentation Description of the software, and the way in which it was used to generate the peak list.
XML Instance Representation
<...>
<software
completionTime=" xs:dateTime [0..1] ?"> [1] ?
<name> xs:string </name> [1] ?
<version> xs:string </version> [1] ?
<comments> xs:string </comments> [0..1] ?
</software>
<processingMethod> paramType </processingMethod> [0..1] ?
</...>
Schema Component Representation
<xs:complexType name="dataProcessingType">
<xs:sequence>
<xs:element name="software">
<xs:complexType>
<xs:complexContent>
<xs:extension base=" softwareType "/>
</xs:complexContent>
</xs:complexType>
</xs:element>
<xs:element name="processingMethod" type=" paramType " minOccurs="0"/>
</xs:sequence>
</xs:complexType>
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Complex Type: descriptionType

Super-types: paramType < descriptionType (by extension)
Sub-types: None
Name descriptionType
Abstract no
Documentation Extension of 'paramType' with an added free-text comment attribute.
XML Instance Representation
<...
comment=" xs:string [0..1] ?">
Start Choice [0..*]
<cvParam> cvParamType </cvParam> [1] ?
<userParam> userParamType </userParam> [1] ?
End Choice
</...>
Schema Component Representation
<xs:complexType name="descriptionType">
<xs:complexContent>
<xs:extension base=" paramType ">
<xs:attribute name="comment" type=" xs:string " use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
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Complex Type: instrumentDescriptionType

Super-types: None
Sub-types: None
Name instrumentDescriptionType
Abstract no
Documentation Description of the components of the mass spectrometer used
XML Instance Representation
<...>
<instrumentName> xs:string </instrumentName> [1] ?
<source> paramType </source> [1] ?
<analyzerList
count=" xs:int [1] ?"> [1] ?
<analyzer> paramType </analyzer> [1..*] ?
</analyzerList>
<detector> paramType </detector> [1] ?
<additional> paramType </additional> [0..1] ?
</...>
Schema Component Representation
<xs:complexType name="instrumentDescriptionType">
<xs:sequence>
<xs:element name="instrumentName" type=" xs:string "/>
<xs:element name="source" type=" paramType "/>
<xs:element name="analyzerList">
<xs:complexType>
<xs:sequence>
<xs:element name="analyzer" type=" paramType " maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="count" type=" xs:int " use="required"/>
</xs:complexType>
</xs:element>
<xs:element name="detector" type=" paramType "/>
<xs:element name="additional" type=" paramType " minOccurs="0"/>
</xs:sequence>
</xs:complexType>
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Complex Type: paramType

Super-types: None
Sub-types:
Name paramType
Abstract no
Documentation Structure allowing the use of controlled or uncontrolled vocabulary
XML Instance Representation
<...>
Start Choice [0..*]
<cvParam> cvParamType </cvParam> [1] ?
<userParam> userParamType </userParam> [1] ?
End Choice
</...>
Schema Component Representation
<xs:complexType name="paramType">
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="cvParam" type=" cvParamType "/>
<xs:element name="userParam" type=" userParamType "/>
</xs:choice>
</xs:complexType>
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Complex Type: peakListBinaryType

Super-types: None
Sub-types: None
Name peakListBinaryType
Abstract no
Documentation Extension of binary data group for m/z and intensity values
XML Instance Representation
<...>
<data
precision=" xs:string (value comes from list: {'32'|'64'}) [1]"
endian=" xs:string (value comes from list: {'big'|'little'}) [1]"
length=" xs:int [1]"> [1]
xs:base64Binary
</data>
</...>
Schema Component Representation
<xs:complexType name="peakListBinaryType">
<xs:group ref=" binaryDataGroup "/>
</xs:complexType>
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Complex Type: personType

Super-types: None
Sub-types: None
Name personType
Abstract no
Documentation Data type for operator identification information.
XML Instance Representation
<...>
<name> xs:string </name> [1] ?
<institution> xs:string </institution> [1] ?
<contactInfo> xs:string </contactInfo> [0..1] ?
</...>
Schema Component Representation
<xs:complexType name="personType">
<xs:sequence>
<xs:element name="name" type=" xs:string "/>
<xs:element name="institution" type=" xs:string "/>
<xs:element name="contactInfo" type=" xs:string " minOccurs="0"/>
</xs:sequence>
</xs:complexType>
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Complex Type: precursorType

Super-types: None
Sub-types: None
Name precursorType
Abstract no
Documentation The method of precursor ion selection and activation
XML Instance Representation
<...
msLevel=" xs:int [1]"
spectrumRef=" xs:int [1] ?">
<ionSelection> paramType </ionSelection> [1] ?
<activation> paramType </activation> [1] ?
</...>
Schema Component Representation
<xs:complexType name="precursorType">
<xs:sequence>
<xs:element name="ionSelection" type=" paramType "/>
<xs:element name="activation" type=" paramType "/>
</xs:sequence>
<xs:attribute name="msLevel" type=" xs:int " use="required"/>
<xs:attribute name="spectrumRef" type=" xs:int " use="required"/>
</xs:complexType>
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Complex Type: softwareType

Super-types: None
Sub-types: None
Name softwareType
Abstract no
Documentation Software information (the software that produced the peak list).
XML Instance Representation
<...
completionTime=" xs:dateTime [0..1] ?">
<name> xs:string </name> [1] ?
<version> xs:string </version> [1] ?
<comments> xs:string </comments> [0..1] ?
</...>
Schema Component Representation
<xs:complexType name="softwareType">
<xs:sequence>
<xs:element name="name" type=" xs:string "/>
<xs:element name="version" type=" xs:string "/>
<xs:element name="comments" type=" xs:string " minOccurs="0"/>
</xs:sequence>
<xs:attribute name="completionTime" type=" xs:dateTime " use="optional"/>
</xs:complexType>
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Complex Type: sourceFileType

Super-types: None
Sub-types: None
Name sourceFileType
Abstract no
Documentation Description of the source file, including location and type.
XML Instance Representation
<...>
<nameOfFile> xs:string </nameOfFile> [1] ?
<pathToFile> xs:anyURI </pathToFile> [1] ?
<fileType> xs:string </fileType> [0..1] ?
</...>
Schema Component Representation
<xs:complexType name="sourceFileType">
<xs:sequence>
<xs:element name="nameOfFile" type=" xs:string "/>
<xs:element name="pathToFile" type=" xs:anyURI "/>
<xs:element name="fileType" type=" xs:string " minOccurs="0"/>
</xs:sequence>
</xs:complexType>
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Complex Type: spectrumDescType

Super-types: None
Sub-types: None
Name spectrumDescType
Abstract no
Documentation Description of the process of performing an acquisition
XML Instance Representation
<...>
<spectrumSettings> spectrumSettingsType </spectrumSettings> [1] ?
<precursorList
count=" xs:int [1] ?"> [0..1] ?
<precursor> precursorType </precursor> [1..*] ?
</precursorList>
<comments> xs:string </comments> [0..*] ?
</...>
Schema Component Representation
<xs:complexType name="spectrumDescType">
<xs:sequence>
<xs:element name="spectrumSettings" type=" spectrumSettingsType "/>
<xs:element name="precursorList" minOccurs="0">
<xs:complexType>
<xs:sequence>
<xs:element name="precursor" type=" precursorType " maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="count" type=" xs:int " use="required"/>
</xs:complexType>
</xs:element>
<xs:element name="comments" type=" xs:string " minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
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Complex Type: spectrumSettingsType

Super-types: None
Sub-types: None
Name spectrumSettingsType
Abstract no
Documentation Description of the parameters for the mass spectrometer for a given acquisition (or list of)
XML Instance Representation
<...>
<acqSpecification
spectrumType=" xs:string (value comes from list: {'discrete'|'continuous'}) [1] ?"
methodOfCombination=" xs:string [1] ?"
count=" xs:int [1] ?"> [0..1] ?
<acquisition
acqNumber=" xs:int [1] ?"> [1..*] ?
Start Choice [0..*]
<cvParam> cvParamType </cvParam> [1] ?
<userParam> userParamType </userParam> [1] ?
End Choice
</acquisition>
</acqSpecification>
<spectrumInstrument
msLevel=" xs:int [1]"
mzRangeStart=" xs:float [0..1]"
mzRangeStop=" xs:float [0..1]"> [1] ?
Start Choice [0..*]
<cvParam> cvParamType </cvParam> [1] ?
<userParam> userParamType </userParam> [1] ?
End Choice
</spectrumInstrument>
</...>
Schema Component Representation
<xs:complexType name="spectrumSettingsType">
<xs:sequence>
<xs:element name="acqSpecification" minOccurs="0">
<xs:complexType>
<xs:sequence>
<xs:element name="acquisition" maxOccurs="unbounded">
<xs:complexType>
<xs:complexContent>
<xs:extension base=" paramType ">
<xs:attribute name="acqNumber" type=" xs:int " use="required"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
</xs:element>
</xs:sequence>
<xs:attribute name="spectrumType" use="required">
<xs:simpleType>
<xs:restriction base=" xs:string ">
<xs:enumeration value="discrete"/>
<xs:enumeration value="continuous"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute name="methodOfCombination" type=" xs:string " use="required"/>
<xs:attribute name="count" type=" xs:int " use="required"/>
</xs:complexType>
</xs:element>
<xs:element name="spectrumInstrument">
<xs:complexType>
<xs:complexContent>
<xs:extension base=" paramType ">
<xs:attribute name="msLevel" type=" xs:int " use="required"/>
<xs:attribute name="mzRangeStart" type=" xs:float " use="optional"/>
<xs:attribute name="mzRangeStop" type=" xs:float " use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
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Complex Type: spectrumType

Super-types: None
Sub-types: None
Name spectrumType
Abstract no
Documentation The structure tha captures the generation of a peak list (including the underlying acquisitions)
XML Instance Representation
<...
id=" xs:int [1] ?">
<spectrumDesc> spectrumDescType </spectrumDesc> [1] ?
<supDesc> supDescType </supDesc> [0..*] ?
<mzArrayBinary> peakListBinaryType </mzArrayBinary> [1] ?
<intenArrayBinary> peakListBinaryType </intenArrayBinary> [1] ?
Start Choice [0..*] ?
<supDataArrayBinary> supDataBinaryType </supDataArrayBinary> [1] ?
<supDataArray> supDataType </supDataArray> [1] ?
End Choice
</...>
Schema Component Representation
<xs:complexType name="spectrumType">
<xs:sequence>
<xs:element name="spectrumDesc" type=" spectrumDescType "/>
<xs:element name="supDesc" type=" supDescType " minOccurs="0" maxOccurs="unbounded"/>
<xs:element name="mzArrayBinary" type=" peakListBinaryType "/>
<xs:element name="intenArrayBinary" type=" peakListBinaryType "/>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="supDataArrayBinary" type=" supDataBinaryType "/>
<xs:element name="supDataArray" type=" supDataType "/>
</xs:choice>
</xs:sequence>
<xs:attribute name="id" type=" xs:int " use="required"/>
</xs:complexType>
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Complex Type: supDataBinaryType

Super-types: None
Sub-types: None
Name supDataBinaryType
Abstract no
Documentation Extension of binary data group for supplemental data
XML Instance Representation
<...
id=" xs:int [1] ?">
<arrayName> xs:string </arrayName> [1] ?
<data
precision=" xs:string (value comes from list: {'32'|'64'}) [1]"
endian=" xs:string (value comes from list: {'big'|'little'}) [1]"
length=" xs:int [1]"> [1]
xs:base64Binary
</data>
</...>
Schema Component Representation
<xs:complexType name="supDataBinaryType">
<xs:sequence>
<xs:element name="arrayName" type=" xs:string "/>
<xs:group ref=" binaryDataGroup "/>
</xs:sequence>
<xs:attribute name="id" type=" xs:int " use="required"/>
</xs:complexType>
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Complex Type: supDataType

Super-types: None
Sub-types: None
Name supDataType
Abstract no
Documentation Data type for additional data vectors (beyond m/z and intensity).
XML Instance Representation
<...
id=" xs:int [1] ?"
length=" xs:int [1] ?"
indexed=" xs:boolean [1] ?"
offset=" xs:int [0..1] ?">
<arrayName> xs:string </arrayName> [1] ?
Start Choice [1]
<float> xs:float </float> [1..*]
<double> xs:double </double> [1..*]
<int> xs:int </int> [1..*]
<boolean> xs:boolean </boolean> [1..*]
<string> xs:string </string> [1..*]
<time> xs:float </time> [1..*]
<URI> xs:anyURI </URI> [1..*]
End Choice
</...>
Schema Component Representation
<xs:complexType name="supDataType">
<xs:sequence>
<xs:element name="arrayName" type=" xs:string "/>
<xs:choice>
<xs:element name="float" type=" xs:float " maxOccurs="unbounded"/>
<xs:element name="double" type=" xs:double " maxOccurs="unbounded"/>
<xs:element name="int" type=" xs:int " maxOccurs="unbounded"/>
<xs:element name="boolean" type=" xs:boolean " maxOccurs="unbounded"/>
<xs:element name="string" type=" xs:string " maxOccurs="unbounded"/>
<xs:element name="time" type=" xs:float " maxOccurs="unbounded"/>
<xs:element name="URI" type=" xs:anyURI " maxOccurs="unbounded"/>
</xs:choice>
</xs:sequence>
<xs:attribute name="id" type=" xs:int " use="required"/>
<xs:attribute name="length" type=" xs:int " use="required"/>
<xs:attribute name="indexed" type=" xs:boolean " use="required"/>
<xs:attribute name="offset" type=" xs:int " use="optional" default="0"/>
</xs:complexType>
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Complex Type: supDescType

Super-types: None
Sub-types: None
Name supDescType
Abstract no
Documentation Description of a supplemental data array
XML Instance Representation
<...
supDataArrayRef=" xs:int [1] ?">
<supDataDesc> descriptionType </supDataDesc> [0..1] ?
<supSourceFile> sourceFileType </supSourceFile> [0..*] ?
</...>
Schema Component Representation
<xs:complexType name="supDescType">
<xs:sequence>
<xs:element name="supDataDesc" type=" descriptionType " minOccurs="0"/>
<xs:element name="supSourceFile" type=" sourceFileType " minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="supDataArrayRef" type=" xs:int " use="required"/>
</xs:complexType>
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Complex Type: userParamType

Super-types: None
Sub-types: None
Name userParamType
Abstract no
Documentation Uncontrolled user parameters (vocabulary).
XML Instance Representation
<...
name=" xs:string [1] ?"
value=" xs:string [0..1] ?"/>
Schema Component Representation
<xs:complexType name="userParamType">
<xs:attribute name="name" type=" xs:string " use="required"/>
<xs:attribute name="value" type=" xs:string " use="optional"/>
</xs:complexType>
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Model Group: binaryDataGroup

Name binaryDataGroup
Documentation The structure into which base64-encoded binary data go
XML Instance Representation
<data
precision=" xs:string (value comes from list: {'32'|'64'}) [1]"
endian=" xs:string (value comes from list: {'big'|'little'}) [1]"
length=" xs:int [1]"> [1]
xs:base64Binary
</data>
Schema Component Representation
<xs:group name="binaryDataGroup">
<xs:sequence>
<xs:element name="data">
<xs:complexType>
<xs:simpleContent>
<xs:extension base=" xs:base64Binary ">
<xs:attribute name="precision" use="required">
<xs:simpleType>
<xs:restriction base=" xs:string ">
<xs:enumeration value="32"/>
<xs:enumeration value="64"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute name="endian" use="required">
<xs:simpleType>
<xs:restriction base=" xs:string ">
<xs:enumeration value="big"/>
<xs:enumeration value="little"/>
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:attribute name="length" type=" xs:int " use="required"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:group>
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Legend

Complex Type:

Schema Component Type

AusAddress

Schema Component Name
Super-types: Address < AusAddress (by extension)
Sub-types:
  • QLDAddress (by restriction)
If this schema component is a type definition, its type hierarchy is shown in a gray-bordered box.
Name AusAddress
Abstract no
The table above displays the properties of this schema component.
XML Instance Representation
<... country="Australia" >
<unitNo> string </unitNo> [0..1]
<houseNo> string </houseNo> [1]
<street> string </street> [1]
Start Choice [1]
<city> string </city> [1]
<town> string </town> [1]
End Choice
<state> AusStates </state> [1]
<postcode> string <<pattern = [1-9][0-9]{3}>> </postcode> [1] ?
</...>

The XML Instance Representation table above shows the schema component's content as an XML instance.

Schema Component Representation
<complexType name="AusAddress">
<complexContent>
<extension base=" Address ">
<sequence>
<element name="state" type=" AusStates "/>
<element name="postcode">
<simpleType>
<restriction base=" string ">
<pattern value="[1-9][0-9]{3}"/>
</restriction>
</simpleType>
</element>
</sequence>
<attribute name="country" type=" string " fixed="Australia"/>
</extension>
</complexContent>
</complexType>
The Schema Component Representation table above displays the underlying XML representation of the schema component. (Annotations are not shown.)
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Glossary

Abstract (Applies to complex type definitions and element declarations). An abstract element or complex type cannot used to validate an element instance. If there is a reference to an abstract element, only element declarations that can substitute the abstract element can be used to validate the instance. For references to abstract type definitions, only derived types can be used.

All Model Group Child elements can be provided in any order in instances. See: http://www.w3.org/TR/xmlschema-1/#element-all.

Choice Model Group Only one from the list of child elements and model groups can be provided in instances. See: http://www.w3.org/TR/xmlschema-1/#element-choice.

Collapse Whitespace Policy Replace tab, line feed, and carriage return characters with space character (Unicode character 32). Then, collapse contiguous sequences of space characters into single space character, and remove leading and trailing space characters.

Disallowed Substitutions (Applies to element declarations). If substitution is specified, then substitution group members cannot be used in place of the given element declaration to validate element instances. If derivation methods, e.g. extension, restriction, are specified, then the given element declaration will not validate element instances that have types derived from the element declaration's type using the specified derivation methods. Normally, element instances can override their declaration's type by specifying an xsi:type attribute.

Key Constraint Like Uniqueness Constraint, but additionally requires that the specified value(s) must be provided. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.

Key Reference Constraint Ensures that the specified value(s) must match value(s) from a Key Constraint or Uniqueness Constraint. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.

Model Group Groups together element content, specifying the order in which the element content can occur and the number of times the group of element content may be repeated. See: http://www.w3.org/TR/xmlschema-1/#Model_Groups.

Nillable (Applies to element declarations). If an element declaration is nillable, instances can use the xsi:nil attribute. The xsi:nil attribute is the boolean attribute, nil, from the http://www.w3.org/2001/XMLSchema-instance namespace. If an element instance has an xsi:nil attribute set to true, it can be left empty, even though its element declaration may have required content.

Notation A notation is used to identify the format of a piece of data. Values of elements and attributes that are of type, NOTATION, must come from the names of declared notations. See: http://www.w3.org/TR/xmlschema-1/#cNotation_Declarations.

Preserve Whitespace Policy Preserve whitespaces exactly as they appear in instances.

Prohibited Derivations (Applies to type definitions). Derivation methods that cannot be used to create sub-types from a given type definition.

Prohibited Substitutions (Applies to complex type definitions). Prevents sub-types that have been derived using the specified derivation methods from validating element instances in place of the given type definition.

Replace Whitespace Policy Replace tab, line feed, and carriage return characters with space character (Unicode character 32).

Sequence Model Group Child elements and model groups must be provided in the specified order in instances. See: http://www.w3.org/TR/xmlschema-1/#element-sequence.

Substitution Group Elements that are members of a substitution group can be used wherever the head element of the substitution group is referenced.

Substitution Group Exclusions (Applies to element declarations). Prohibits element declarations from nominating themselves as being able to substitute a given element declaration, if they have types that are derived from the original element's type using the specified derivation methods.

Target Namespace The target namespace identifies the namespace that components in this schema belongs to. If no target namespace is provided, then the schema components do not belong to any namespace.

Uniqueness Constraint Ensures uniqueness of an element/attribute value, or a combination of values, within a specified scope. See: http://www.w3.org/TR/xmlschema-1/#cIdentity-constraint_Definitions.

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