temporalReferenceSystems

Table of Contents

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Schema Document Properties

Target Namespacehttp://www.opengis.net/gml
Version3.2.0
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.
Schema Composition
DocumentationSee ISO/DIS 19136 15.5. A value in the time domain is measured relative to a temporal reference system. Common types of reference systems include calendars, ordinal temporal reference systems, and temporal coordinate systems (time elapsed since some epoch). The primary temporal reference system for use with geographic information is the Gregorian Calendar and 24 hour local or Coordinated Universal Time (UTC), but special applications may entail the use of alternative reference systems. The Julian day numbering system is a temporal coordinate system that has an origin earlier than any known calendar, at noon on 1 January 4713 BC in the Julian proleptic calendar, and is useful in transformations between dates in different calendars. In GML seven concrete elements are used to describe temporal reference systems: gml:TimeReferenceSystem, gml:TimeCoordinateSystem, gml:TimeCalendar, gml:TimeCalendarEra, gml:TimeClock, gml:TimeOrdinalReferenceSystem, and gml:TimeOrdinalEra.
Application DatatemporalReferenceSystems.xsd
More information at: urn:ogc:specification:gml:schema-xsd:temporalReferenceSystems:3.2.0.

Declared Namespaces

PrefixNamespace
Default namespacehttp://www.w3.org/2001/XMLSchema
xmlhttp://www.w3.org/XML/1998/namespace
gmlhttp://www.opengis.net/gml
Schema Component Representation
<schema targetNamespace="http://www.opengis.net/gml" elementFormDefault="qualified" version="3.2.0">
<include schemaLocation="temporalTopology.xsd"/>
<include schemaLocation="dictionary.xsd"/>
...
</schema>
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Global Declarations

Element: TimeCalendar

NameTimeCalendar
Typegml:TimeCalendarType
Nillableno
Abstractno
DocumentationA calendar is a discrete temporal reference system that provides a basis for defining temporal position to a resolution of one day. gml:TimeCalendar adds one property to those inherited from gml:TimeReferenceSystem. A gml:referenceFrame provides a link to a gml:TimeCalendarEra that it uses. A gml:TimeCalendar may reference more than one calendar era. The referenceFrame element follows the standard GML property model, allowing the association to be instantiated either using an inline description using the gml:TimeCalendarEra element, or a link to a gml:TimeCalendarEra which is explicit elsewhere.
XML Instance Representation
<gml:TimeCalendar
gml:id="[1]">
<gml:metaDataProperty> ... </gml:metaDataProperty> [0..*]
<gml:description> ... </gml:description> [0..1]
<gml:descriptionReference> ... </gml:descriptionReference> [0..1]
<gml:identifier> ... </gml:identifier> [1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:domainOfValidity> string </gml:domainOfValidity> [1]
<gml:referenceFrame> gml:TimeCalendarEraPropertyType </gml:referenceFrame> [1..*]
</gml:TimeCalendar>
Schema Component Representation
<element name="TimeCalendar" type="gml:TimeCalendarType" substitutionGroup="gml:TimeReferenceSystem"/>
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Element: TimeCalendarEra

NameTimeCalendarEra
Typegml:TimeCalendarEraType
Nillableno
Abstractno
Documentationgml:TimeCalendarEra inherits basic properties from gml:DefinitionType and has the following additional properties: - gml:referenceEvent is the name or description of a mythical or historic event which fixes the position of the base scale of the calendar era. This is given as text or using a link to description held elsewhere. - gml:referenceDate specifies the date of the referenceEvent expressed as a date in the given calendar. In most calendars, this date is the origin (i.e., the first day) of the scale, but this is not always true. - gml:julianReference specifies the Julian date that corresponds to the reference date. The Julian day number is an integer value; the Julian date is a decimal value that allows greater resolution. Transforming calendar dates to and from Julian dates provides a relatively simple basis for transforming dates from one calendar to another. - gml:epochOfUse is the period for which the calendar era was used as a basis for dating.
XML Instance Representation
<gml:TimeCalendarEra
gml:id="[1]">
<gml:metaDataProperty> ... </gml:metaDataProperty> [0..*]
<gml:description> ... </gml:description> [0..1]
<gml:descriptionReference> ... </gml:descriptionReference> [0..1]
<gml:identifier> ... </gml:identifier> [1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:referenceEvent> gml:StringOrRefType </gml:referenceEvent> [1]
<gml:referenceDate> gml:CalDate </gml:referenceDate> [1]
<gml:julianReference> decimal </gml:julianReference> [1]
<gml:epochOfUse> gml:TimePeriodPropertyType </gml:epochOfUse> [1]
</gml:TimeCalendarEra>
Schema Component Representation
<element name="TimeCalendarEra" type="gml:TimeCalendarEraType"/>
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Element: TimeClock

NameTimeClock
Typegml:TimeClockType
Nillableno
Abstractno
DocumentationA clock provides a basis for defining temporal position within a day. A clock shall be used with a calendar in order to provide a complete description of a temporal position within a specific day. gml:TimeClock adds the following properties to those inherited from gml:TimeReferenceSystemType: - gml:referenceEvent is the name or description of an event, such as solar noon or sunrise, which fixes the position of the base scale of the clock. - gml:referenceTime specifies the time of day associated with the reference event expressed as a time of day in the given clock. The reference time is usually the origin of the clock scale. - gml:utcReference specifies the 24 hour local or UTC time that corresponds to the reference time. - gml:dateBasis contains or references the calendars that use this clock.
XML Instance Representation
<gml:TimeClock
gml:id="[1]">
<gml:metaDataProperty> ... </gml:metaDataProperty> [0..*]
<gml:description> ... </gml:description> [0..1]
<gml:descriptionReference> ... </gml:descriptionReference> [0..1]
<gml:identifier> ... </gml:identifier> [1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:domainOfValidity> string </gml:domainOfValidity> [1]
<gml:referenceEvent> gml:StringOrRefType </gml:referenceEvent> [1]
<gml:referenceTime> time </gml:referenceTime> [1]
<gml:utcReference> time </gml:utcReference> [1]
<gml:dateBasis> gml:TimeCalendarPropertyType </gml:dateBasis> [0..*]
</gml:TimeClock>
Schema Component Representation
<element name="TimeClock" type="gml:TimeClockType" substitutionGroup="gml:TimeReferenceSystem"/>
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Element: TimeCoordinateSystem

NameTimeCoordinateSystem
Typegml:TimeCoordinateSystemType
Nillableno
Abstractno
DocumentationA temporal coordinate system shall be based on a continuous interval scale defined in terms of a single time interval. The differences to ISO 19108 TM_CoordinateSystem are: - the origin is specified either using the property gml:originPosition whose value is a direct time position, or using the property gml:origin whose model is gml:TimeInstantPropertyType; this permits more flexibility in representation and also supports referring to a value fixed elsewhere; - the interval uses gml:TimeIntervalLengthType.
XML Instance Representation
<gml:TimeCoordinateSystem
gml:id="[1]">
<gml:metaDataProperty> ... </gml:metaDataProperty> [0..*]
<gml:description> ... </gml:description> [0..1]
<gml:descriptionReference> ... </gml:descriptionReference> [0..1]
<gml:identifier> ... </gml:identifier> [1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:domainOfValidity> string </gml:domainOfValidity> [1]
Start Choice [1]
<gml:originPosition> gml:TimePositionType </gml:originPosition> [1]
<gml:origin> gml:TimeInstantPropertyType </gml:origin> [1]
End Choice
<gml:interval> gml:TimeIntervalLengthType </gml:interval> [1]
</gml:TimeCoordinateSystem>
Schema Component Representation
<element name="TimeCoordinateSystem" type="gml:TimeCoordinateSystemType" substitutionGroup="gml:TimeReferenceSystem"/>
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Element: TimeOrdinalEra

NameTimeOrdinalEra
Typegml:TimeOrdinalEraType
Nillableno
Abstractno
DocumentationIts content model follows the pattern of gml:TimeEdge, inheriting standard properties from gml:DefinitionType, and adding gml:start, gml:end and gml:extent properties, a set of gml:member properties which indicate ordered gml:TimeOrdinalEra elements, and a gml:group property which points to the parent era. The recursive inclusion of gml:TimeOrdinalEra elements allow the construction of an arbitrary depth hierarchical ordinal reference schema, such that an ordinal era at a given level of the hierarchy includes a sequence of shorter, coterminous ordinal eras.
XML Instance Representation
<gml:TimeOrdinalEra
gml:id="[1]">
<gml:metaDataProperty> ... </gml:metaDataProperty> [0..*]
<gml:description> ... </gml:description> [0..1]
<gml:descriptionReference> ... </gml:descriptionReference> [0..1]
<gml:identifier> ... </gml:identifier> [1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:relatedTime> gml:RelatedTimeType </gml:relatedTime> [0..*]
<gml:start> gml:TimeNodePropertyType </gml:start> [1]
<gml:end> gml:TimeNodePropertyType </gml:end> [1]
<gml:extent> gml:TimePeriodPropertyType </gml:extent> [0..1]
<gml:member> gml:TimeOrdinalEraPropertyType </gml:member> [0..*]
<gml:group> gml:ReferenceType </gml:group> [0..1]
</gml:TimeOrdinalEra>
Schema Component Representation
<element name="TimeOrdinalEra" type="gml:TimeOrdinalEraType"/>
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Element: TimeOrdinalReferenceSystem

NameTimeOrdinalReferenceSystem
Typegml:TimeOrdinalReferenceSystemType
Nillableno
Abstractno
DocumentationIn some applications of geographic information — such as geology and archaeology — relative position in time is known more precisely than absolute time or duration. The order of events in time can be well established, but the magnitude of the intervals between them cannot be accurately determined; in such cases, the use of an ordinal temporal reference system is appropriate. An ordinal temporal reference system is composed of a sequence of named coterminous eras, which may in turn be composed of sequences of member eras at a finer scale, giving the whole a hierarchical structure of eras of verying resolution. An ordinal temporal reference system whose component eras are not further subdivided is effectively a temporal topological complex constrained to be a linear graph. An ordinal temporal reference system some or all of whose component eras are subdivided is effectively a temporal topological complex with the constraint that parallel branches may only be constructed in pairs where one is a single temporal ordinal era and the other is a sequence of temporal ordinal eras that are called "members" of the "group". This constraint means that within a single temporal ordinal reference system, the relative position of all temporal ordinal eras is unambiguous. The positions of the beginning and end of a given era may calibrate the relative time scale. gml:TimeOrdinalReferenceSystem adds one or more gml:component properties to the generic temporal reference system model.
XML Instance Representation
<gml:TimeOrdinalReferenceSystem
gml:id="[1]">
<gml:metaDataProperty> ... </gml:metaDataProperty> [0..*]
<gml:description> ... </gml:description> [0..1]
<gml:descriptionReference> ... </gml:descriptionReference> [0..1]
<gml:identifier> ... </gml:identifier> [1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:domainOfValidity> string </gml:domainOfValidity> [1]
<gml:component> gml:TimeOrdinalEraPropertyType </gml:component> [1..*]
</gml:TimeOrdinalReferenceSystem>
Schema Component Representation
<element name="TimeOrdinalReferenceSystem" type="gml:TimeOrdinalReferenceSystemType" substitutionGroup="gml:TimeReferenceSystem"/>
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Element: TimeReferenceSystem

NameTimeReferenceSystem
Typegml:TimeReferenceSystemType
Nillableno
Abstractno
DocumentationA reference system is characterized in terms of its domain of validity: the spatial and temporal extent over which it is applicable. The basic GML element for temporal reference systems is gml:TimeReferenceSystem. Its content model extends gml:DefinitionType with one additional property, gml:domainOfValidity.
XML Instance Representation
<gml:TimeReferenceSystem
gml:id="[1]">
<gml:metaDataProperty> ... </gml:metaDataProperty> [0..*]
<gml:description> ... </gml:description> [0..1]
<gml:descriptionReference> ... </gml:descriptionReference> [0..1]
<gml:identifier> ... </gml:identifier> [1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:domainOfValidity> string </gml:domainOfValidity> [1]
</gml:TimeReferenceSystem>
Schema Component Representation
<element name="TimeReferenceSystem" type="gml:TimeReferenceSystemType" substitutionGroup="gml:Definition"/>
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Global Definitions

Complex Type: TimeCalendarEraPropertyType

Super-types:None
Sub-types:None
NameTimeCalendarEraPropertyType
Abstractno
Documentationgml:TimeCalendarEraPropertyType provides for associating a gml:TimeCalendarEra with an object.
XML Instance Representation
<...
owns="boolean [0..1]"
xlink:type="simple [0..1]"
xlink:href="[0..1]"
xlink:role="[0..1]"
xlink:arcrole="[0..1]"
xlink:title="[0..1]"
xlink:show="[0..1]"
xlink:actuate="[0..1]"
nilReason="gml:NilReasonType [0..1]"
gml:remoteSchema="[0..1]">
Start Sequence [0..1]
<gml:TimeCalendarEra> ... </gml:TimeCalendarEra> [1]
End Sequence
</...>
Schema Component Representation
<complexType name="TimeCalendarEraPropertyType">
<sequence minOccurs="0">
<element ref="gml:TimeCalendarEra"/>
</sequence>
<attributeGroup ref="gml:OwnershipAttributeGroup"/>
<attributeGroup ref="gml:AssociationAttributeGroup"/>
</complexType>
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Complex Type: TimeCalendarEraType

Super-types:gml:DefinitionType < TimeCalendarEraType (by extension)
Sub-types:None
NameTimeCalendarEraType
Abstractno
XML Instance Representation
<...
gml:id="[1]">
<gml:description> ... </gml:description> [0..1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:referenceEvent> gml:StringOrRefType </gml:referenceEvent> [1]
<gml:referenceDate> gml:CalDate </gml:referenceDate> [1]
<gml:julianReference> decimal </gml:julianReference> [1]
<gml:epochOfUse> gml:TimePeriodPropertyType </gml:epochOfUse> [1]
</...>
Schema Component Representation
<complexType name="TimeCalendarEraType">
<complexContent>
<extension base="gml:DefinitionType">
<sequence>
<element name="referenceEvent" type="gml:StringOrRefType"/>
<element name="referenceDate" type="gml:CalDate"/>
<element name="julianReference" type="decimal"/>
<element name="epochOfUse" type="gml:TimePeriodPropertyType"/>
</sequence>
</extension>
</complexContent>
</complexType>
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Complex Type: TimeCalendarPropertyType

Super-types:None
Sub-types:None
NameTimeCalendarPropertyType
Abstractno
Documentationgml:TimeCalendarPropertyType provides for associating a gml:TimeCalendar with an object.
XML Instance Representation
<...
owns="boolean [0..1]"
xlink:type="simple [0..1]"
xlink:href="[0..1]"
xlink:role="[0..1]"
xlink:arcrole="[0..1]"
xlink:title="[0..1]"
xlink:show="[0..1]"
xlink:actuate="[0..1]"
nilReason="gml:NilReasonType [0..1]"
gml:remoteSchema="[0..1]">
Start Sequence [0..1]
<gml:TimeCalendar> ... </gml:TimeCalendar> [1]
End Sequence
</...>
Schema Component Representation
<complexType name="TimeCalendarPropertyType">
<sequence minOccurs="0">
<element ref="gml:TimeCalendar"/>
</sequence>
<attributeGroup ref="gml:OwnershipAttributeGroup"/>
<attributeGroup ref="gml:AssociationAttributeGroup"/>
</complexType>
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Complex Type: TimeCalendarType

Super-types:gml:DefinitionType < TimeReferenceSystemType (by extension) < TimeCalendarType (by extension)
Sub-types:None
NameTimeCalendarType
Abstractno
XML Instance Representation
<...
gml:id="[1]">
<gml:description> ... </gml:description> [0..1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:domainOfValidity> string </gml:domainOfValidity> [1]
<gml:referenceFrame> gml:TimeCalendarEraPropertyType </gml:referenceFrame> [1..*]
</...>
Schema Component Representation
<complexType name="TimeCalendarType">
<complexContent>
<extension base="gml:TimeReferenceSystemType">
<sequence>
<element name="referenceFrame" type="gml:TimeCalendarEraPropertyType" maxOccurs="unbounded"/>
</sequence>
</extension>
</complexContent>
</complexType>
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Complex Type: TimeClockPropertyType

Super-types:None
Sub-types:None
NameTimeClockPropertyType
Abstractno
Documentationgml:TimeClockPropertyType provides for associating a gml:TimeClock with an object.
XML Instance Representation
<...
owns="boolean [0..1]"
xlink:type="simple [0..1]"
xlink:href="[0..1]"
xlink:role="[0..1]"
xlink:arcrole="[0..1]"
xlink:title="[0..1]"
xlink:show="[0..1]"
xlink:actuate="[0..1]"
nilReason="gml:NilReasonType [0..1]"
gml:remoteSchema="[0..1]">
Start Sequence [0..1]
<gml:TimeClock> ... </gml:TimeClock> [1]
End Sequence
</...>
Schema Component Representation
<complexType name="TimeClockPropertyType">
<sequence minOccurs="0">
<element ref="gml:TimeClock"/>
</sequence>
<attributeGroup ref="gml:OwnershipAttributeGroup"/>
<attributeGroup ref="gml:AssociationAttributeGroup"/>
</complexType>
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Complex Type: TimeClockType

Super-types:gml:DefinitionType < TimeReferenceSystemType (by extension) < TimeClockType (by extension)
Sub-types:None
NameTimeClockType
Abstractno
Prohibited Derivationsrestriction, extension
XML Instance Representation
<...
gml:id="[1]">
<gml:description> ... </gml:description> [0..1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:domainOfValidity> string </gml:domainOfValidity> [1]
<gml:referenceEvent> gml:StringOrRefType </gml:referenceEvent> [1]
<gml:referenceTime> time </gml:referenceTime> [1]
<gml:utcReference> time </gml:utcReference> [1]
<gml:dateBasis> gml:TimeCalendarPropertyType </gml:dateBasis> [0..*]
</...>
Schema Component Representation
<complexType name="TimeClockType" final="#all">
<complexContent>
<extension base="gml:TimeReferenceSystemType">
<sequence>
<element name="referenceEvent" type="gml:StringOrRefType"/>
<element name="referenceTime" type="time"/>
<element name="utcReference" type="time"/>
<element name="dateBasis" type="gml:TimeCalendarPropertyType" minOccurs="0" maxOccurs="unbounded"/>
</sequence>
</extension>
</complexContent>
</complexType>
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Complex Type: TimeCoordinateSystemType

Super-types:gml:DefinitionType < TimeReferenceSystemType (by extension) < TimeCoordinateSystemType (by extension)
Sub-types:None
NameTimeCoordinateSystemType
Abstractno
XML Instance Representation
<...
gml:id="[1]">
<gml:description> ... </gml:description> [0..1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:domainOfValidity> string </gml:domainOfValidity> [1]
Start Choice [1]
<gml:originPosition> gml:TimePositionType </gml:originPosition> [1]
<gml:origin> gml:TimeInstantPropertyType </gml:origin> [1]
End Choice
<gml:interval> gml:TimeIntervalLengthType </gml:interval> [1]
</...>
Schema Component Representation
<complexType name="TimeCoordinateSystemType">
<complexContent>
<extension base="gml:TimeReferenceSystemType">
<sequence>
<choice>
<element name="originPosition" type="gml:TimePositionType"/>
<element name="origin" type="gml:TimeInstantPropertyType"/>
</choice>
<element name="interval" type="gml:TimeIntervalLengthType"/>
</sequence>
</extension>
</complexContent>
</complexType>
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Complex Type: TimeOrdinalEraPropertyType

Super-types:None
Sub-types:None
NameTimeOrdinalEraPropertyType
Abstractno
Documentationgml:TimeOrdinalEraPropertyType provides for associating a gml:TimeOrdinalEra with an object.
XML Instance Representation
<...
owns="boolean [0..1]"
xlink:type="simple [0..1]"
xlink:href="[0..1]"
xlink:role="[0..1]"
xlink:arcrole="[0..1]"
xlink:title="[0..1]"
xlink:show="[0..1]"
xlink:actuate="[0..1]"
nilReason="gml:NilReasonType [0..1]"
gml:remoteSchema="[0..1]">
Start Sequence [0..1]
<gml:TimeOrdinalEra> ... </gml:TimeOrdinalEra> [1]
End Sequence
</...>
Schema Component Representation
<complexType name="TimeOrdinalEraPropertyType">
<sequence minOccurs="0">
<element ref="gml:TimeOrdinalEra"/>
</sequence>
<attributeGroup ref="gml:OwnershipAttributeGroup"/>
<attributeGroup ref="gml:AssociationAttributeGroup"/>
</complexType>
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Complex Type: TimeOrdinalEraType

Super-types:gml:DefinitionType < TimeOrdinalEraType (by extension)
Sub-types:None
NameTimeOrdinalEraType
Abstractno
XML Instance Representation
<...
gml:id="[1]">
<gml:description> ... </gml:description> [0..1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:relatedTime> gml:RelatedTimeType </gml:relatedTime> [0..*]
<gml:start> gml:TimeNodePropertyType </gml:start> [1]
<gml:end> gml:TimeNodePropertyType </gml:end> [1]
<gml:extent> gml:TimePeriodPropertyType </gml:extent> [0..1]
<gml:member> gml:TimeOrdinalEraPropertyType </gml:member> [0..*]
<gml:group> gml:ReferenceType </gml:group> [0..1]
</...>
Schema Component Representation
<complexType name="TimeOrdinalEraType">
<complexContent>
<extension base="gml:DefinitionType">
<sequence>
<element name="relatedTime" type="gml:RelatedTimeType" minOccurs="0" maxOccurs="unbounded"/>
<element name="start" type="gml:TimeNodePropertyType"/>
<element name="end" type="gml:TimeNodePropertyType"/>
<element name="extent" type="gml:TimePeriodPropertyType" minOccurs="0"/>
<element name="member" type="gml:TimeOrdinalEraPropertyType" minOccurs="0" maxOccurs="unbounded"/>
<element name="group" type="gml:ReferenceType" minOccurs="0"/>
</sequence>
</extension>
</complexContent>
</complexType>
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Complex Type: TimeOrdinalReferenceSystemType

Super-types:gml:DefinitionType < TimeReferenceSystemType (by extension) < TimeOrdinalReferenceSystemType (by extension)
Sub-types:None
NameTimeOrdinalReferenceSystemType
Abstractno
XML Instance Representation
<...
gml:id="[1]">
<gml:description> ... </gml:description> [0..1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:domainOfValidity> string </gml:domainOfValidity> [1]
<gml:component> gml:TimeOrdinalEraPropertyType </gml:component> [1..*]
</...>
Schema Component Representation
<complexType name="TimeOrdinalReferenceSystemType">
<complexContent>
<extension base="gml:TimeReferenceSystemType">
<sequence>
<element name="component" type="gml:TimeOrdinalEraPropertyType" maxOccurs="unbounded"/>
</sequence>
</extension>
</complexContent>
</complexType>
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Complex Type: TimeReferenceSystemType

Super-types:gml:DefinitionType < TimeReferenceSystemType (by extension)
Sub-types:
NameTimeReferenceSystemType
Abstractno
XML Instance Representation
<...
gml:id="[1]">
<gml:description> ... </gml:description> [0..1]
<gml:name> ... </gml:name> [0..*]
<gml:remarks> ... </gml:remarks> [0..1]
<gml:domainOfValidity> string </gml:domainOfValidity> [1]
</...>
Schema Component Representation
<complexType name="TimeReferenceSystemType">
<complexContent>
<extension base="gml:DefinitionType">
<sequence>
<element name="domainOfValidity" type="string"/>
</sequence>
</extension>
</complexContent>
</complexType>
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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.
NameAusAddress
Abstractno
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
<complexTypename="AusAddress">
<complexContent>
<extensionbase="Address">
<sequence>
<elementname="state" type="AusStates"/>
<elementname="postcode">
<simpleType>
<restrictionbase="string">
<patternvalue="[1-9][0-9]{3}"/>
</restriction>
</simpleType>
</element>
</sequence>
<attributename="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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