1. AIXM 5.1 XML Developers' Seminar #2 – Dec 2009
13/05/2018
AIXM UML to XSD
AIXM 5.1 XML Developers' Seminar #2 – Dec 2009
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2. Content Overview of AIXM files Mapping rules for Datatypes
13/05/2018
Content
Overview of AIXM files
Mapping rules for Datatypes
Mapping rules for Features
Presentation AIXM scripts
Creation of an extension
AIXM UML to XSD
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3. Overview of AIXM files GML 3.2 AIXM 5.1 W3C xlink
includes
GML 3.2
ISO metadata schema
W3C xlink
AIXM 5.1
The file AIXM_AbstractGML_ObjectTypes.xsd
References ISO19139 Metadata Schema
Defines the base AIXM Feature Constructs
AbstractAIXMFeatureType / AbstractAIXMFeature
AbstractAIXMTimesliceType / AbstractAIXMTimeslice
The file AIXM_DataTypes.xsd contains the mapping of the AIXM datatypes
The file AIXM_Features.xsd contains the mapping of the AIXM features
AIXM UML to XSD

4. Overview of AIXM files AIXM 5.1 UML AIXM 5.1 XSD
13/05/2018
Overview of AIXM files
AIXM 5.1 UML
AIXM 5.1 Mapping Rules
AIXM 5.1 XSD
AIXM 5.1 Mapping rules explains how to translate the AIXM 5.1 UML model into an XML grammar based on a subset of the Geography Markup Language (GML 3.2)
Mapping rules are defined for:
AIXM Datatypes
AIXM Features
AIXM UML to XSD
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5. AIXM 5.1 - UML to XSD Mapping Rules - Datatypes

6. AIXM 5.1 Mapping Rules - Datatypes
Mapping <<enumeration>>
<simpleType name="CodeAircraftEngineBaseType">
<union>
<simpleType>
<restriction base="xsd:string">
<enumeration value="JET">
<annotation>
<documentation/>
</annotation>
</enumeration>
<enumeration value="PISTON"/>
<enumeration value=“TURBOPROP"/>
<enumeration value=“ALL"/>
</restriction>
</simpleType>
<restriction base="string">
<pattern value="OTHER:\w{2,58}"/>
</union>
NEW AIXM NEW AIXM 5.1 -
AIXM UML to XSD

7. AIXM 5.1 Mapping Rules - Datatypes
Mapping <<codelist>>
<simpleType name="CodeApproachLightingBaseType">
<union>
<simpleType>
<restriction base="xsd:string">
<enumeration value="ALSAF">
</enumeration>
<enumeration value="MALS">
<enumeration value="MALSR">
<enumeration value="SALS">
......
</restriction>
</simpleType>
<restriction base="string"> -- NO PATTERN --
</union>
AIXM UML to XSD

8. AIXM 5.1 Mapping Rules - Datatypes
Mapping <<datatype>> - default case
<simpleType name="DateBaseType">
<restriction base="xsd:date">
</restriction>
</simpleType>
AIXM UML to XSD

9. AIXM 5.1 Mapping Rules - NilReason
Most of AIXM 5.1 Data Types define a nilReason, used to indicate the reason for a null value.
NEW AIXM NEW AIXM 5.1 -
NEW AIXM NEW AIXM 5.1 -
NEW AIXM NEW AIXM 5.1 -
AIXM UML to XSD

10. AIXM 5.1 Mapping Rules - NilReason
<simpleType name="CodeAircraftEngineBaseType">
<union>
<simpleType>
<restriction base="xsd:string">
<enumeration value="JET">
……………………..
</restriction>
</simpleType>
<restriction base="string">
<pattern value="OTHER:\w{2,58}"/>
</union>
Mapping nilReason
NEW AIXM NEW AIXM 5.1 -
<complexType name="CodeAircraftEngineType">
<simpleContent>
<extension base="aixm:CodeAircraftEngineBaseType">
<attribute name="nilReason“ type="aixm:NilReasonType"/>
</extension>
</simpleContent>
</complexType>
AIXM UML to XSD

11. AIXM 5.1 Mapping Rules - UOM
Mapping Units of Measurement
<simpleType name=“ValDepthBaseType">
<restriction base="xsd:decimal">
</restriction>
</simpleType>
<complexType name="ValDepthType">
<simpleContent>
<extension base="aixm:ValDepthBaseType">
<attribute name="nilReason" type="aixm:NilReasonType"/>
<attribute name="uom" type="aixm:UomDepthType" use="required"/>
</extension>
</simpleContent>
</complexType>
AIXM UML to XSD

12. AIXM 5.1 - UML to XSD Mapping Rules - Features

13. AIXM 5.1 Mapping Rules - Features
13/05/2018
AIXM 5.1 Mapping Rules - Features
AIXM is based on GML
AIXM Features are GML features…
AIXM follows the GML object-property concept.
<AirportHeliport> <!-- feature -->
<ElevatedPoint> <!-- object -->
The AIXM exchange model is an XML exchange standard based on a subset of the Geography Markup Language (GML). Essentially:
• AIXM Features are GML features;
• AIXM Objects are GML objects;
• AIXM follows the GML object-property concept.
The GML object-property model explains some of the complexity of the AIXM UML to XSD mapping. It means that no GML object may appear as the immediate child of a GML object. Consequently, no element may be both a GML object and a GML property. The object-property model prohibits the encoding of an object directly inside a feature, e.g.
<AirportHeliport> <!-- feature -->
<ElevatedPoint> <!-- object -->
Instead, in a compliant GML application schema, an association between two features (or a feature and an object) is implemented over a property of the feature, e.g.
<hasReferencePoint> <!-- property -->
The direction of the association arrow from the UML diagrams (the navigability) dictates which of the two association partners has the property that associates the other. In the AIXM XML Schema, the object-property model is encoded by declaring a type and then assigning properties (attributes and relationships) to that type. The type defines the object.
Within the AIXM XML Schema, inheritance implies two characteristics:
1. Substitutability. The more general feature or object can be substituted by a specialization. In the XML schema this is supported using substitution groups.
2. Property inheritance. The specialized feature inherits all of the properties of the more general feature. In the XML schema
<AirportHeliport> <!-- feature -->
<hasReferencePoint> <!-- property -->
<ElevatedPoint> <!-- object -->
AIXM UML to XSD
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14. AIXM 5.1 Mapping Rules - Features
For each AIXM Feature in the UML, the following XML schema entities are created:
FeaturePropertyType
Feature
FeatureType
FeatureTimeSlicePropertyType
FeatureTimeSlice
FeatureTimeSliceType
FeaturePropertyGroup
AIXM objects are encoded as GML objects. The mapping rules for Objects are the same as the rules for Features except that
Object do not exist outside of a feature
TimeSlice types and elements are not created
AIXM UML to XSD

15. AIXM 5.1 Mapping Rules - Features
13/05/2018
AIXM 5.1 Mapping Rules - Features
RunwayPropertyType
Runway
RunwayType
RunwayTimeSlicePropertyType
RunwayTimeSlice
RunwayTimeSliceType
RunwayPropertyGroup
<group name="RunwayPropertyGroup">
<sequence>
<element name="designator“ type="aixm:TextDesignatorType" nillable="true" minOccurs="0">
<annotation>
<documentation>The full textual designator of the runway, used to uniquely identify it at an aerodrome/heliport which has more than one.
E.g. 09/27, 02R/20L, RWY 1.
</documentation>
</annotation>
</element>
<element name="type" type="aixm:CodeRunwayType" nillable="true" minOccurs="0">
[………………]
</sequence>
</group>
It shows clearly how the attributes are mapped from the UML to the XSD and how the
relationship ‘associatedAirportHeliport’ is created. It also illustrates the presence of the
nilReason attribute.
UML properties are mapped into FeaturePropertyGroup
AIXM UML to XSD
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16. AIXM 5.1 Mapping Rules - Features
13/05/2018
AIXM 5.1 Mapping Rules - Features
RunwayPropertyType
Runway
RunwayType
RunwayTimeSlicePropertyType
RunwayTimeSlice
RunwayTimeSliceType
RunwayPropertyGroup
<group name="RunwayPropertyGroup">
<sequence>
<element name="designator" nillable="true" minOccurs="0">
[………………]
<element name="surfaceProperties" nillable="true" minOccurs="0">
<complexType>
<complexContent> <extension base="aixm:SurfaceCharacteristicsPropertyType">
<attribute name="nilReason" type="gml:NilReasonEnumeration"/>
</extension>
</complexContent>
</complexType>
</element>
AIXM UML to XSD
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17. AIXM 5.1 Mapping Rules - Features
13/05/2018
AIXM 5.1 Mapping Rules - Features
RunwayPropertyType
Runway
RunwayType
RunwayTimeSlicePropertyType
RunwayTimeSlice
RunwayTimeSliceType
RunwayPropertyGroup
UML properties are mapped into FeaturePropertyGroup
<group name="RunwayPropertyGroup">
<sequence>
<element name="designator" type="aixm:TextDesignatorType" nillable="true" minOccurs="0">
[………………]
<element name="type" type="aixm:CodeRunwayType" nillable="true" minOccurs="0">
<element name="associatedAirportHeliport" type="aixm:AirportHeliportPropertyType" nillable="true" minOccurs="0">
</sequence>
</group>
AIXM UML to XSD
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18. AIXM 5.1 Mapping Rules - Features
13/05/2018
AIXM 5.1 Mapping Rules - Features
RunwayPropertyType
Runway
RunwayType
RunwayTimeSlicePropertyType
RunwayTimeSlice
RunwayTimeSliceType
RunwayPropertyGroup
The RunwayTimeSliceType encapsulates all the Runway properties that change over time
<complexType name="RunwayTimeSliceType">
<complexContent>
<extension base="aixm:AbstractAIXMTimeSliceType">
<sequence>
<group ref="aixm:RunwayPropertyGroup"/>
<element name="extension" minOccurs="0" maxOccurs="unbounded">
<complexType>
<element ref="aixm:AbstractRunwayExtension"/>
</sequence>
<attributeGroup ref="gml:OwnershipAttributeGroup"/>
</complexType>
</element>
</extension>
</complexContent>
The properties of a feature or the target of any feature relationship can change within the
lifetime of the feature. This temporality can be expressed in GML by using dynamic features
and feature collections. The TimeSlice property of a dynamic feature contains one or more
Feature TimeSlices that capture the evolution of the feature over time. A gml:TimeSlice
object contains the dynamic properties of the feature.
For each feature a TimeSlice property is created that contains an array of feature TimeSlice
objects. This example shows the RunwayTimeSliceType encapsulating all of the Runway
properties (RunwayPropertyGroup created above) that change over time.
AIXM UML to XSD
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19. AIXM 5.1 Mapping Rules - Features
13/05/2018
AIXM 5.1 Mapping Rules - Features
RunwayPropertyType
Runway
RunwayType
RunwayTimeSlicePropertyType
RunwayTimeSlice
RunwayTimeSliceType
RunwayPropertyGroup
<element name="RunwayTimeSlice" type="aixm:RunwayTimeSliceType" substitutionGroup="gml:AbstractTimeSlice"/>
The FeatureTimeSlice object is of type FeatureTimeSliceType. Continuing the example, the
RunwayTimeSlice element is of type RunwayTimeSliceType.
RunwayTimeSlice element is of type RunwayTimeSliceType.
AIXM UML to XSD
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20. AIXM 5.1 Mapping Rules - Features
13/05/2018
AIXM 5.1 Mapping Rules - Features
RunwayPropertyType
Runway
RunwayType
RunwayTimeSlicePropertyType
RunwayTimeSlice
RunwayTimeSliceType
RunwayPropertyGroup
<complexType name="RunwayTimeSlicePropertyType">
<sequence>
<element ref="aixm:RunwayTimeSlice"/>
</sequence>
<attributeGroup ref="gml:OwnershipAttributeGroup"/>
</complexType>
A GML property type containing a FeatureTimeSlice objects is created.
A GML property type containing a FeatureTimeSlice objects is created.
AIXM UML to XSD
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21. AIXM 5.1 Mapping Rules - Features
13/05/2018
AIXM 5.1 Mapping Rules - Features
RunwayPropertyType
Runway
RunwayType
RunwayTimeSlicePropertyType
RunwayTimeSlice
RunwayTimeSliceType
RunwayPropertyGroup
<complexType name="RunwayType">
<complexContent>
<extension base="aixm:AbstractAIXMFeatureType">
<sequence>
<element name="timeSlice" type="aixm:RunwayTimeSlicePropertyType" maxOccurs="unbounded"/>
</sequence>
</extension>
</complexContent>
</complexType>
Continuing with the object-property model, the Runway feature type is created extending the
AbstractAIXMFeatureType with the RunwayTimeSlice object created above.
The Runway feature type is created extending the AbstractAIXMFeatureType with the RunwayTimeSlice object created before.
AIXM UML to XSD
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22. AIXM 5.1 Mapping Rules - Features
13/05/2018
AIXM 5.1 Mapping Rules - Features
RunwayPropertyType
Runway
RunwayType
RunwayTimeSlicePropertyType
RunwayTimeSlice
RunwayTimeSliceType
RunwayPropertyGroup
<element name="Runway" type="aixm:RunwayType" substitutionGroup="aixm:AbstractAIXMFeature">
<annotation>
<documentation>A defined rectangular area on a land aerodrome/heliport prepared for the landing and take-off of aircraft.
Note: this includes the concept of Final Approach and Take-Off Area (FATO) for helicopters.
</documentation>
</annotation>
</element>
The Runway feature is then defined by the RunwayType.
The Runway feature is then defined by the RunwayType.
AIXM UML to XSD
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23. AIXM 5.1 Mapping Rules - Features
13/05/2018
AIXM 5.1 Mapping Rules - Features
RunwayPropertyType
Runway
RunwayType
RunwayTimeSlicePropertyType
RunwayTimeSlice
RunwayTimeSliceType
RunwayPropertyGroup
<complexType name="RunwayPropertyType">
<attributeGroup ref="gml:OwnershipAttributeGroup"/>
<attributeGroup ref="gml:AssociationAttributeGroup"/>
</complexType>
When a property of a feature is a relationship, the relationship must be associated to another
feature or object. This is done through the creation of the FeaturePropertyType, in this case,
the RunwayPropertyType.
In AIXM, when the relationship or association points to another feature, the feature is
referenced using the xlink:href attribute (it’s always a “remote” encoding). When the
relationship points to an object, the object is included inside the parent. (Objects cannot
exist without the parent.) Since a Runway is a feature the RunwayPropertyType is created
with the attribute xlink:href .
Used for relationship to feature Runway
Provides the xlink:href attribute
AIXM UML to XSD
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24. AIXM 5.1 Mapping Rules – Other cases
Mapping Associations with Association Classes
<<datatype>> with no BaseType
<<enumeration>> CodeNilReasonType
<<datatype>> TextXHTMLBaseType
Please refer to AIXM documentation:
AIXM - UML to XML Schema Mapping
AIXM UML to XSD

25. AIXM 5.1 - UML to XSD AIXM Scripts

26. AIXM 5.1 - UML to XSD Walkthrough AIXM 5.1 XSD Schemas

27. AIXM 5.1 - UML to XSD Creation of an extension

28. UML Extension
A feature or object may be extended by creating a class with the same name as the core AIXM feature and giving it a stereotype <<extension>>.
New classes (features and objects), that do not extend existing AIXM Core classes, can be also created.
AIXM UML to XSD

29. UML Extension
Extensions shall NOT be included in the core AIXM packages
AIXM UML to XSD

30. AIXM 5.1 Mapping Rules - Extensions
AIXM_Features.xsd is defined in such a way that multiple extensions can be included in the core FeatureTimesliceType
Features with the stereotype of <<extension>> generates three related elements for that class.
FeatureExtensionPropertyGroup
FeatureExtensionType
FeatureExtension
<complexType name="AirspaceTimeSliceType">
<complexContent>
<extension base="aixm:AbstractAIXMTimeSliceType">
<sequence>
<group ref="aixm:AirspacePropertyGroup"/>
<element name="extension" minOccurs="0" maxOccurs="unbounded">
<complexType>
<element ref="aixm:AbstractAirspaceExtension"/>
[…………….]
AIXM UML to XSD

31. AIXM 5.1 Mapping Rules - Extensions
AirspaceExtension
AirspaceExtensionType
AirspaceExtensionPropertyGroup
<group name="AirspaceExtensionPropertyGroup">
<sequence>
<element name="flexibleUse“ type=“CodeYesNoType” nillable="true" minOccurs="0">
[…………….] <element name="level1“ type=“CodeYesNoType” nillable="true" minOccurs="0">
[…………….] </sequence>
</group>
AIXM UML to XSD

32. AIXM 5.1 Mapping Rules - Extensions
AirspaceExtension
AirspaceExtensionType
AirspaceExtensionPropertyGroup
<complexType name="AirspaceExtensionType">
<complexContent>
<extension base="aixm:AbstractExtensionType">
<sequence>
<group ref="easm:AirspaceExtensionPropertyGroup"/>
</sequence>
</extension>
</complexContent>
</complexType>
A relationship is created with an abstract XML element that acts as the root for all extensions.
AIXM UML to XSD

33. AIXM 5.1 Mapping Rules - Extensions
AirspaceExtension
AirspaceExtensionType
AirspaceExtensionPropertyGroup
<element name="AirspaceExtension" type="easm:AirspaceExtensionType“ substitutionGroup="aixm:AbstractAirspaceExtension"/>
AIXM UML to XSD

34. Focus on AIXM Basic Message
is an AIXM 5.1 extension
contains just a collection of AIXM features
AIXM UML to XSD

35. Questions ?