ICAO Annex 3 XML Representations IWXXM 1.0 RC1
ICAO Annex 3 XML RepresentationsIWXXM 1.0 RC1Aaron BraeckelFeb 2013
ICAO Annex 3ICAO International Civil AviationAuthority Set aviation weatherrequirementsWMO World MeteorologicalOrganization Develop and maintainappropriate code forms tomeet requirements
ICAO Annex 3Amendment 76 – Nov 2013“States in a position to do so shouldexchange METAR, SPECI, SIGMET and TAFin a digital form” (XML/GML)Amendment 77 – Nov 2016“METAR, SPECI, SIGMET and TAF should beexchanged in a digital form”
Example AIRMET FlowTAC-encoded as(VORs/waypoints)Created as points FROM JNC TO40NW LAA TO30ESE TBE TO 50NETCC TO .NWS/AWCGraphics generatedfrom pointsTAC decoded intopointsDownstream ConsumerHuman-readable - Machine-readable DIFFICULTMachine-readable - Human-readable STRAIGHTFORWARD
Model PackagesICAO Weather Information Exchange Model(IWXXM)METAR, SPECI, TAF, and SIGMET representationsSimple Aviation Features (SAF)Simplified features from the aviation domain, such asaerodrome and runway (relationship to AIXM)Meteorological Community Exchange Model(METCE)WMO logical data model, specifically Observationsand Measurements (O&M) specializationsMET Basic Types (Met-basic)Measures, CodeLists and other meteorological basictypesObservable Property Model (OPM)Qualifications and constraints on observedproperties
Sampling FeaturesIn meteorology, we define a sampling regime that enables us to observe,measure or simulate the real-world. Sampling Features (from ISO 19156‘Observations and measurements’) provide a way to characterise thissampling regime and the relationship to the real-world.84579:NamedPlacename “Exeter Airport” sampledFeature03839:SF SamplingPoint featureOfInterest:ComplexSamplingMeasurement shape:Point@srsName“EPSG:4326”pos “50.737 -3405”6Credit: Jeremy Tandy
Simple Aviation Features (SAF)Simplified representations of aviationfeatures (runway, aerodrome, flightinformation region, air traffic services unit)SAF simplified, referenceable versions ofexisting AIXM constructsMETCEOPMMet-basic developed in a cross-domain mannerwith AIXM and FIXM developers(aeronautical information and flightinformation groups) based on conceptual modellingframework from ISO 19100 seriesGeographic Information / Geomatics7
IWXXMIWXXMEncoding of the ICAO Annex 3 reports(METAR, SPECI, TAF, SIGMET) usingISO, OGC, and WMO modelsSAF based on conceptual modellingframework from ISO 19100 series uses METCE, OPM, Met-basic andSAFMETCEOPMMet-basicGeographic Information / Geomatics8
IWXXM ReportsMETAR, SPECI, TAF, SIGMETReports contain one or more observations and forecasts
IWXXM Observation and ForecastObservation resultsObservation results in IWXXM are called RecordsTAF Record(details omitted)
ICAO Dictionaries/RegistersDiscussions on ICAO-managed aeronautical information (aerodrome,runway, FIR, etc.) registers underwayDifferent representations: Human-readable (HTML) Semantic (RDF/SKOS) Machine-readable (XML and others)
Annex 3 DifferencesA number of state differences to Annex 3 have been filedwith ICAOFor testing and validation of the model, US extensionshave been encoded in a US extension to IWXXMNo XML Schema has yet been generated, work inprogressFiled state differences that are a subset of Annex 3 mayrequire changes to IWXXM schemas
Standards RelationshipData ModelComponent AgilityHigh(months)Standards Governance BodyNorth keholderComponentsUS Extensions toAnnex 3(US IWXXM)Aviation Community(Eurocontrol, FAA,and others)Aviation-Specific Weather Components (WXXM)Annex 3 Aviation-Specific Weather Components (ICAO IWXXM)General Purpose WeatherComponents(WMO METCE)GMLISO 19136Meteorological Measuresand Code Lists(WMO le metadata(WMO or OGC OPM)International CivilAviation Organization (ICAO)World MeteorologicalOrganization (WMO)Observations and MeasurementsISO 19156ISO / OGCISO 19103, 19107, 19108, 19115, 19123, Low(years)XMLUMLW3C / OMG
Efficient XML StudyMETAR formBytes per reportTAC without headers(avg over 24 hours)67 bytesUncompressed WXXM/XML(avg over 24 hours) 2700 bytes (40x)EXI compressed WXXM/XML Tips:30 bytes (0.45x)(avg for 24 hours in one file)EXI compressedWXXM/XML 350floatingbytes (5x) Useappropriate(a single report instance*)point precisionGZIP compressed WXXM/XML 1150 bytes (17x)Don’traw TAC text(avg for 24 hoursin oneincludefile)(WXXM)Takeaways: EXI-compressed XML can range from half the size per report of TAC (for24 hour package) to 5x (for a single message package) GZIP compression is easy and worthwhileCaveats: WXXM 1.1, 80-90% decoded TAC information
AvXML 1.0 standard development schedule[7th Dec 2013] 1.0RC1 release[1st Feb 2013] 1.0RC1 review closed[1-8 Feb 2013] 1.0RC1 feedback clarification[Feb-Mar 2013] Amendments incorporated for 1.0RC2[Mar 2013] 1.0RC2 published for review[Spring 2013] WXXM 2.0 release incorporating IWXXM[July 2013] AvXML 1.0 published[Nov 2013] “States in a position to do so” may exchange AvXML 1.015
Active Discussions Strong and weak typing Complexity XML Schema 1.0 and XML Schema 1.1 with opencontent model and rules Product-centrism (TAC) and data-centrism (XML) State differences (those countries that don’t meetminimum ICAO standards) and others 16
Components of 1.0 RC1IWXXM 1.0RC1 is published for review at the WMO /tiki-index.php?page METCE-1.0RC11.0 RC1 includes:Release notesConceptual model (UML)Enterprise Architect Project File (EAP)XMI formatHTML documentation package (requires local deployment)XML SchemasPublished onlineCompressed file bundleJava bindings for XML SchemasSimple tutorial describing METAR and VA SIGMET XML instances17
Further information on AvXMLFAQ /tiki-index.php?page METCE-1.0RC1FAQModerated public review comments:CBS-TT-AvXML Google GroupNote that comments on AvXML 1.0RC1 should be submitted to the Google groupusing a subject line beginning with the text “[1.0RC1-feedback]”Temporary HTML l/1.0RC1/18
UMLToolsEnterprise Architect (UML) – free readerReads .EAP files and .XMI oads.htmlYour web browserReads .HTML filesXMLAny text editor/viewerOxygen XML Editor - http://www.oxygenxml.com/XML Spy - http://www.altova.com/xml-editor/19
Any questions?Please provide your feedback andcomments to the CBS-TT-AvXML Google Groupcomments on AvXML 1.0RC2 should be submitted to the Google group usinga subject line beginning with the text “[1.0RC2-feedback]”Thank you20
Annex 3 Differences A number of state differences to Annex 3 have been filed with ICAO For testing and validation of the model, US extensions have been encoded in a US extension to IWXXM No XML Schema has yet been generated, work in progress Filed state differences that are a subset of Annex 3 may require changes to IWXXM schemasFile Size: 914KBPage Count: 20
ICAO Doc 9184, Airport Planning Manual, Parts 1 to 3; ICAO Doc 9261, Heliport Manual; ICAO Doc 9332, Manual on the ICAO Bird Strike Information System (IBIS); ICAO Doc 9365, Manual of All-Weather Operations; ICAO Doc 9426, Air Traffic Services Planning Manual; ICAO Doc 9476, Manual of Surface Movement Guidance and Control Systems (SMGCS); ICAO .
CHAPTER 2 - ICAO STATE LETTERS (ANNEX AMENDMENTS) 2.1 Notification of amendment to an ICAO Annex. 2.1.1 Proposals to amend an ICAO Annex are notified by an ICAO technical State letter. Amendment to regulations (involving rule/ Civil Aviation Requirements) is initiated as a re
The latest amendments to the ICAO SARPs considered in this RMT are: — ICAO Annex 16 Volume I, latest edition including Amendment 13, — ICAO Annex 16 Volume II, latest edition including Amendment 10, — ICAO Annex 16 Volume III, latest edition including Amendment 1, —
1.3 This BAR is based mainly on compliance with the following ICAO documents: (a) ICAO Annex 10 Volumes I to V – Aeronautical Telecommunications; (b) ICAO Annex 11 – Air Traffic Service; (c) ICAO Annex 19 – Safety Management; (d) ICAO Doc 8071 Volumes I to III – Testing of Ground-based and Satellite-
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ICAO Annex 1 – Amdt.172 Annex 6 – Amdt.38 PANS-TRG – Amdt. 3 Doc 10011 02/2014 ICAO amendments to Annex 1, Annex 6 and PANS-TRG (Doc 9868) to a) Meet the UPRT requirements for an MPL, contained in Annex 1 b) Provide UPRT recommendations for a CPL(A), contained in Annex 1 c) Meet the requirements for type-rating, contained
Annex 6 Operation of Aircraft Annex 7 Aircraft Nationality and Registration Marks Annex 8 Airworthiness of Aircraft Annex 9 Facilitation Annex 10 Aeronautical Telecommunications Annex 11 Air Traffic Services . Therefore, ICAO has implemented the
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