The European Organisation for the Safety of Air Navigation
Focus Area: Meteorology“What Scott promised” The CRs from MET
AIRM Review Forum – 12-Sept-2011
Dennis HART, DSR/CMN/IM
The CRs discussed in the MET domain
•AIRM Rulebook adherence
•ICAO Annex 3 adherence
•Volcanic Ash Representation
•OGC TestBed observations
•Namespaces
•ISO/OGC Observation & Measurement model v2 adherence
•Extension points
The CRs that survived (partly)
•AIRM Rulebook adherence
•ICAO Annex 3 adherence
•Volcanic Ash Representation
•OGC TestBed observations
•Namespaces
•ISO/OGC Observation & Measurement model v2 adherence
•Extension points
The European Organisation for the Safety of Air Navigation
Focus Area: Meteorology“Lean and Mean” WXXM from AIRM
AIRM Review Forum – 12-Sept-2011
Dennis HART & Hubert LEPORI, DSR/CMN/IM
Global Interoperability
•Global consensus:
•User requirements for MET could differ around the globe
•MET provision capability could differ around the globe
•MET Information exchange needs to be standardised
Global Interoperability
•SESAR AIRM version 1.1.1 --- MET IM, LDM, XML schema v1.1
•MET contribution to SESAR ATM Information Exchange
•‘AIRM’ centric
•WXCM/WXXM/WXXS version 1.1.3
•Global draft specification for MET information exchange
•Baseline for ICAO & WMO adoption
•Data domain centric
•Notion of ATM Information Exchange/Management underdevelopment
•FAA NextGen moving fast
•ICAO – WMO Will probably take slightly longer
Facing reality in MET
WorldMeteorologicalOrganization
ICAO
‘lean and mean’ WXXM from AIRM
•Developing the AIRM whilst assuring global interoperability for thecoming years
•AIRM WXXM
•Pragmatic
•Automated (preferably)
•SESAR centric
•Designated task in P08.01.06
•Question raised:
Can we have a WXXM derived from the AIRM CLDM v.v.?
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Solution Sets, the options
“lean and mean” WXXM from AIRM
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Option 1: WXXM = MET part of AIRM
WXCM
WXXM
WXXS
AIRM IM(MET)
AIRM CLDM(MET)
WXXS
traces
traces
Replaced by
Replaced by
AIRM – managed by AIRM CCB
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Option 1: WXXM – AIRM: gap analysis
•WXXM = “implementation independent,capable of supporting multiple physicalimplementations”
•WXXM follows the GML object-propertymodel, which requires the properties ofobjects to be encapsulated by a simple type
•The WXXS is entirely machine-generatedfrom the UML model. […] The toolset used towork with the UML model and generate theschema includes […] FullMoon.
•FullMoon supports the processing of a UML «ApplicationSchema», exported as an XMI document.
•FullMoon is able to process only an application schema whichfollows the ISO 19101 & ISO 19109 general feature model.
WXXM
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Option 1: WXXM – AIRM: gap analysis
•ISO 19109 Rules For Application Schema:
application schema
conceptual schema for data required by one or more applications
application
manipulation and processing of data in support of user requirements
6.1 Purpose of an application schema
An application schema is a conceptual schema for data required by one or more applications. Anapplication schema defines
- content and structure of data; and
- specifications of operations for manipulating and processing data by an application.
The purpose of an application schema is twofold:
- to provide a computer-readable data description defining the data structure, which makes it possible toapply automated mechanisms for data management; and
- to achieve a common and correct understanding of the data, by documenting the data content of theparticular application field, thereby making it possible to unambiguously retrieve information from thedata.
WXXM is a UML Application Schema in the ISO 19109 sense
WXXM
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Option 1: WXXM – AIRM: gap analysis
•WXXM includes XML or GML-relatedproperties for UML classes and UMLattributes, as required by FullMoon
WXXM
WXXM is NOT technology independent.It is an ISO 19109 Application Schema, extended with someXML/GML elements required to enable the generation of WXXS.
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Option 1: WXXM – AIRM: gap analysis
Principle 3
The AIRM Consolidated Logical Data Model contains definitions ofentities that are part of an ATM operational language, satisfyingoperational requirements and concerns. The entities are defined withoutthe consideration of solution, system and implementation aspects.
Rule 2
The AIRM models shall not contain model constructs with a purpose tosupport a specific implementation, algorithm, technology or solution.
Note: Adding such constructs to a model in general imposes constraintsthat may make a model unnecessarily dependent on implementationdecisions. The AIRM models should be focused on describinginformation needs independent of implementation and technologicaldecisions.
•According to these rules, the AIRM shall only define a commonsemantic. In particular, the AIRM CLDM shall not contain“specifications of operations for manipulating and processing data byan application.”
AIRM
The AIRM does not qualify as an ISO 19109 Application schema
The AIRM is technology independent.
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Option 1: WXXM – AIRM: gap analysis
•With the current AIRM and WXXM principles, Option 1 is NOTfeasible.
AIRM
WXXM
Option 1
AIRM
WXXM
Technologyindependent ?
YES
NO
ISO 19109 UMLApplicationschema ?
NO
YES
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Option 2: derive WXXM from AIRM
AIRM IM
WXXS
AIRM CLDM
traces
AIRM – managed by AIRM CCB
WXCM
WXXM
traces
Derive
Derive
WXCM
WXXM
WXXS
traces
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Option 2: derive WXXM from AIRM
Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Define AIRM=>WXXMmapping rules
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
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Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Define AIRM=>WXXMmapping rules
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
Option 2: derive WXXM from AIRM
Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Define AIRM=>WXXMmapping rules
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
Remove WXXM-specific Tagged Values
Remove stereotypes
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Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Define AIRM=>WXXMmapping rules
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
Option 2: derive WXXM from AIRM
Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
Update the multiplicity of attributes
•In WXXM, the multiplicity [0..1] is displayed
•In AIRM, [0..1] is the default multiplicity (Rule 22).
Rule 22
Attributes shall, by default, be represented with multiplicity of [0..1] (zero to one). If anoperational constraint has been identified then multiplicities should be chosen toreflect such constraints.
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Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Define AIRM=>WXXMmapping rules
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
Option 2: derive WXXM from AIRM
Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
The AIRM separates the Datatypes fromthe Subject fields
The properties typed with a Datatype(enumeration…) are modelled usingUML attributes, and not of UML roles
Reversely, properties typed with SubjectFields are modelled using UML rolesinstead of UML attributes
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Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Define AIRM=>WXXMmapping rules
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
Option 2: derive WXXM from AIRM
Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Results: Updated package “Meteorology” inthe CLDM:
•Contains the WXXM 1.1.3 concepts,
•Complies with the AIRM FoundationRulebook
•Contains also new MET elementsoriginating from other Domain Projects(AirportMeteorology)
All the concepts defined in this package aremodelled consistently, according to theAIRM rules.
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Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Define AIRM=>WXXMmapping rules
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
Option 2: derive WXXM from AIRM
Define AIRM=>WXXMmapping rules
AIRM CLDM
WXXM
Derive
Restore technology-specific information (stereotypes, tagged values…)
Replace associations by attributes
Replace attributes by associations
Update attributes/associations cardinalities ([0..1] for attributes)
Model clean-up: keep only
•The complete Meteorology package
•The classes from the other SubjectField packages which are connected atleast to one MET element
•The classes from the Datatypes package which are used to type a METproperty
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Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Define AIRM=>WXXMmapping rules
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
Option 2: derive WXXM from AIRM
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
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Apply the AIRM Rulebookto the AIRM v1.1.1 METpackage
Define AIRM=>WXXMmapping rules
Implement mapping rules:programmatically recreatea “WXXM-like” model fromthe AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
Option 2: derive WXXM from AIRM
Gap analysis:WXXM 1.1.3 vs “WXXM-like” model
No exact match
•Missing concepts / associations
•WXXM design rules may not be alwaysconsistent
•…
However, the solution should work finewith a more elaborated AIRM contentand clearer AIRM=>WXXM rules
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Option 2: derive WXXM from AIRM
•Option 2 is feasible, provided the right mapping rules arespecified
•Option 2 does not question the AIRM foundation rules nor thekey WXXM principles
•The mapping can be (partially) automated
•WXXM can become an “AIRM-compliant” ISO 19109 ApplicationSchema for Aviation Meteorology
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![MP900442177[1]](data/images/img265.jpg)
Looking now at the bigger picture…
•Let’s take a step back and look at the subject from a broaderperspective !
•We are trying to map a subset of AIRM concepts into an ISO19109 Application Schema and subsequent physical model
•This is NOT specific to the MET Domain !
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“AIRM => ISO 19109Application Schema”Mapping Rules
“AIRM => AIXM”Mapping rules
“AIRM => TICM”Mapping rules
…
MET
Aerodrome
Airspace
Env
Terrain
…
AIRM CLDMSubject Fields
AIS DomainAIXM 5.1
WXXM
Terrain information8.1.4 DomainModel for Terrain
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Which “AIRM-compliant” physicalmodels for SWIM services ?
Type of BusinessService *
Strategicphase
Pre-tacticalphase (D-1)
Tacticalphase
…
MET
Aerodrome
Airspace
…
Utility Service
Trajectorymanagement
Flight Operation
…
SWIM ServiceTaxonomy **
Service LifeCycle
* From B4.3-D11 Service Scope & Approach
Technologicalbinding TBD
Example:WFS 2.0
Pub/Sub…
Utility Service providing MET data for thePre-tactical and tactical phases
Technological binding:► WFS 2.0
► An AIRM-compliant ISO19109 Application Schemawould satisfy my requirements
► Apply the mapping rulesAIRM=>ISO Application schemato the AIRM MET subject field
► WXXM / WXXS is suitable !
EXAMPLE
** SWIM service taxonomy NOT formally defined in Sept 2011
ATMDomain
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Conclusion
•The AIRM defines the shared ATM concepts & the AIRMgovernance is now up and running
•WP B is moving forward with regards to the definition of theSWIM Service taxonomy
•Some 8.1.x projects have started to map subsets of the AIRMCLDM into other models that enable the generation of ad-hocphysical models
•Time to close the loop and prototype the services !
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