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	SCOI:Task Status
	SCOI:Task Status
nopanel	true

Info

title	Guidance

This template allows for the documentation of service definitions based on the requirements found at: /wiki/spaces/SCOI/pages/59605116

General requirements to remember:

SWIM-DEFN-010

Service definition coverage

A service definition shall define a single service

Note: This concerns the definition of a service that can be implemented by service providers. It is not used to describe a running service - use a service description in that case.

Note: This requirement uses "define" rather than "describe".

SWIM-DEFN-020

Service definition language

The textual descriptions in a service definition shall be written in English using the spelling listed as the primary British spelling when conflicting spellings exist.

-

Table of Contents

maxLevel	1
type	flat

Info

title	Status Key

Status
title TBD
- No work has started
Status
colour Red
title WORKING
- Content is being worked on, comments discussed
Status
colour Yellow
title DRAFT
- Draft is ready, comments resolved
Status
colour Green
title REVIEWED
- Group has reviewed, edited the final draft
Status
colour Blue
title AGREED
- Content is finalised and agreed

Service Definition Identification

Status

title	TBD

Info

title	Trace

SWIM-DEFN-030

service definition identification	title	Service definition for the Quantitative Volcanic Ash Information Subscription and Request Service
	edition	00.00.02
	reference date	2024-04-03

Service Identification

Status

title	TBD

Info

title	Trace

SWIM-DEFN-040

service identification	service name	Quantitative Volcanic Ash Information Subscription and Request Service

Service Abstract

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-050

service abstract

The Quantitative Volcanic Ash Information Subscription and Request Service allows the service consumer to get quantitative volcanic ash information in accordance with ICAO Annex 3 Amdt 82 and PANS-MET.

The service consumer can subscribe to the service to receive a warning when a new significant ash cloud occurs. It is also possible to send a direct request, using a request-reply mechanism, to the service to get the relevant quantitative volcanic ash information.

The meteorological information is issued by the designated Volcanic Ash Advisory Centre (VAAC). The meteorological information is only intended to be used by service consumers within the aviation domain.

Service Definition Provider

Status

title	TBD

Info

title	Trace

SWIM-DEFN-085

service definition provider	name	EUROCONTROL
	description	EUROCONTROL is an intergovernmental organisation with 41 Member and 2 Comprehensive Agreement States.
	point of contact	swim@eurocontrol.int

Geographical Extent of Information

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-090

geographical extent of information

The service shall offer quantitative volcanic ash information resulting from volcanic eruptions occurring in the service provider's area of responsibility.

The service shall offer the equivalent quantitative volcanic ash information for the areas of responsibility for which the service provider acts as back-up during outages.

Note: The back-up arrangements are based on mutual agreements between service providers. TBD: Check air navigation plan for the back-ups.

Note: the ash cloud may extend beyond the area of responsibility.

Service Categories

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-095, SWIM-DEFN-100

service categories	category	category name	regulated information exchange
		value	METEOROLOGICAL_INFORMATION_EXCHANGE
		scheme	http://reference.swim.aero/information-services/service-categories/CodeRegulatedInformationExchangeType.html
	category	category name	information domain
		value	METEOROLOGICAL_INFORMATION
		scheme	https://reference.swim.aero/information-services/service-categories/CodeInformationDomainType.html
	category	category name	business activity
		value	INFORMATION_MANAGEMENT
		scheme	http://reference.swim.aero/information-services/service-categories/CodeBusinessActivityType.html
	category	category name	intended service consumer
		value	CIVIL_AIRSPACE_USER MILITARY_AIRSPACE_USER CIVIL_AIR_NAVIGATION_SERVICE_PROVIDER MILITARY_AIR_NAVIGATION_SERVICE_PROVIDER NETWORK_MANAGER REGULATED_METEOROLOGICAL_SERVICE_PROVIDER AIRPORT_OPERATOR AIR_TRAFFIC_SERVICE_PROVIDER
		scheme	https://reference.swim.aero/information-services/service-categories/CodeStakeholderType.html
	category	category name	intended service provider
		value	REGULATED_METEOROLOGICAL_SERVICE_PROVIDER
		scheme	http://reference.swim.aero/information-services/service-categories/CodeStakeholderType.html
	category	category name	service type
		value	METEOROLOGICAL_FEATURE_ACCESS_SERVICE METEOROLOGICAL_INFORMATION_SUBSCRIPTION_SERVICE METEOROLOGICAL_COVERAGE_ACCESS_SERVICE
		scheme	http://reference.swim.aero/information-services/service-categories/CodeServiceType.html

Service Standard Reference

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-120

Info

title	Explanatory note

This field is left empty. It is expected that the service definition developed in Europe by MET3SG will reference any ICAO-level information service definition.

service standard reference	reference
	implemented options
	deviations/additions

Operational Environment

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-130

operational environment

operational needs

Quantitative volcanic ash (QVA) concentration information will be provided by designated volcanic ash advisory centres (VAAC) as part of the International Civil Aviation Organization’s (ICAO) International Airways Volcano Watch (IAVW). It provides a high-resolution four-dimensional representation of a volcanic ash cloud based on 3-hourly timesteps.

The information is intended for use in operator’s flight planning and decision support systems allowing, e.g., more efficient routes in accordance with their safety management programme during significant volcanic ash cloud events.

capabilities

The service provides high quality, up-to-date, trusted, regulated meteorological information in digital form for use by service consumers within the aviation domain.

information exchange requirements

The service takes into account the following information exchange requirements:

IER 1

The information as defined in ICAO Annex 3 Amdt 82 and PANS-MET:

expected dimensions (horizontal and vertical) of significant volcanic ash cloud at 4 concentration thresholds
gridded deterministic forecast of significant volcanic ash cloud showing the expected ash concentration
gridded probabilistic forecast of significant volcanic ash cloud showing the probability of exceeding 4 concentration thresholds
TBD: check flyer for these

Note: Note: Significant in this context means an ash cloud that poses a widespread impact to aircraft operations and air navigation.

Service Functions

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-140

service functions	function	name	Request quantitative volcanic ash information
		description	The service consumer shall be able to request quantitative volcanic ash information filtered by erupting volcano number,forecast timesteps and logical (e.g. severity threshold) operators.
		real-world effect	The meteorological information is received and can be used in ATM and other systems.
	function	name	Request the information in a specific format
		description	The service consumer shall be able to request that the quantitative volcanic ash information be returned as IWXXM polygons, deterministic gridded data and/or probabilistic gridded data.
		real-world effect	The meteorological information is received in the specified format and can be used in ATM and other systems.
	function	name	Subscribe to quantitative volcanic ash information
		description	The service consumer shall be able to subscribe/unsubscribe in order to receive information when a significant volcanic ash cloud occurs.
		real-world effect	The service consumer subscribes to information offered by the service.
	function	name	Distribute warning
		description	The service shall distribute a warning detailing how to access the quantitative volcanic ash information when a significant volcanic ash cloud occurs.
		real-world effect	The service consumer is sent a warning.

Service Access and Use Conditions

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-150

service access and use conditions	legal constraints
	service policies	business policy	It shall be made clear to new service consumers that they must also enter an agreement with the back-up VAACs in case they need to revert to the back-up.
		operational policy	There shall be a service policy to ensure that only service consumers within the aviation domain can use the service. The service policy shall include a requirement that service consumers cannot pass the information obtained from the service to non-aviation users without prior authorisation from the service provider.
		technical policy
	service consumption constraints		There shall be a service consumption constraint to ensure that a service consumer does not impose undue loads on computer and network resources, for example, by polling it at a higher frequency than the status is normally provided.

Security Constraints

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-160

security constraints	authentication	The service shall ensure consumer authentication in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0042. The service shall ensure provider authentication in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0042.
	authorisation	The service shall ensure that satisfactory authorisation is put in place in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile requirement SWIM-TIYP-0070.
	confidentiality	The service shall ensure point-to-point confidentiality in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile through the use of Transport Layer Security (TLS) 1.2 or above.
	integrity	The service shall ensure point-to-point integrity in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile through the use of Transport Layer Security (TLS) 1.2 or above.

Quality of Service

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-180

quality of service	performance	capacity	The service shall achieve a quality that is sufficient to ensure the service is fit for purpose. The service should ensure that a single user is unable to monopolise a service or to degrade it below agreed service levels for others users.
	performance	response time	The service shall achieve a quality that is sufficient to ensure the service is fit for purpose.
	reliability	availability	The service shall achieve a quality that is sufficient to ensure the service is fit for purpose. Note: the following factors must be used in deciding the fitness for purpose: the availability offered by the designated back-up VAACs the number of users likely to be delayed significantly by a loss of the service the acknowledgement that the availability is expected to be higher when a volcano is erupting
	reliability	recoverability	The service shall achieve a quality that is sufficient to ensure the service is fit for purpose.
	security	confidentiality	The service shall ensure confidentiality by using SWIM Technical Infrastructure (TI) Yellow Profile bindings.
	security	integrity	The service shall ensure integrity by using SWIM Technical Infrastructure (TI) Yellow Profile bindings.

Quality of Data

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-185

quality of data

The quality of quantitative volcanic ash information offered by the service shall be verified be the service provider.

The quantitative volcanic ash information offered by the service shall be reported to and overseen by the MET Panel IAVW MOG.

Source of Information

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-190

source of information

source

The service provider shall ensure that the quantitative volcanic ash information offered by the services is based on data received from the appropriate authorised originating sources. This includes:

EUMETSAT
Volcano observatory
REGULATED_METEOROLOGICAL_SERVICE_PROVIDER acting as a designated VACC.

modifications

Note: atmospheric modelling techniques are used to generate the output.

Service Validation Information

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-200

Info

title	Explanatory note

This field is left empty.

service validation information	description

Application Message Exchange Pattern

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-210

application message exchange pattern	PUBLISH_SUBSCRIBE REQUEST_REPLY

Service Behaviour

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-220

service behaviour	typical behaviour	The service behaviour shall be in accordance with the patterns detailed in the Message Exchange Patterns: Identification Guidelines. The interfaces have different behaviour. A combination of an AMQP 1.0 implementation and an OGC implementation shall be used for the basic behaviour. The typical behaviour for PUBLISH_SUBSCRIBE means that: The subscription is handled by either: a request-reply implementation (see Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface) or an email request to the service provider. The distribution of the messages is handled by an AMQP 1.0 implementation (seeQuantitative Volcanic Ash Information Subscription and Request Service Distribution Interface). The typical behaviour for REQUEST_REPLY (as used in Quantitative Volcanic Ash Information Subscription and Request Service Request Interface) is as follows: Synchronous Request/Reply The request message is sent from the service consumer to the service The service consumer remains blocked while awaiting the reply The service remains blocked while processing the reply The Quantitative Volcanic Ash Information Message, the reply message, is sent from the service to the service consumer. Asynchronous Request/Reply The request message is sent from the service consumer to the service The Quantitative Volcanic Ash Information Message, the reply message, is sent from the service to the service consumer.

Service Monitoring

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-230

service monitoring	A service monitoring mechanism should be made available to service consumersand alert them when the service is unavailable so that they can switch to the back-up service.

Service Interfaces

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-240

service interfaces	interface	name	Quantitative Volcanic Ash Information Subscription and Request Service Request Interface
		description	Allows the service consumer to request filtered quantitative volcanic ash information. Note: This interface is used to group the operations offered by the chosen OGC standard.
		provider/consumer side	Provider side
	interface	name	Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface
		description	Allows the service consumer to subscribe to warnings. It allows the service consumer to manage the subscriptions e.g. to unsubscribe. Note: This may be handled by a separate dedicated subscription service. *Note: This is an optional interface. Many service providers will prefer to receive subscription requests by email.*
		provider/consumer side	Provider side
	interface	name	Quantitative Volcanic Ash Information Subscription and Request Service Distribution Interface
		description	Allows the service provider to distribute warnings when a new significant ash cloud occurs meeting the need of the service consumer that has subscribed for updates.
		provider/consumer side	Consumer side

SWIM TI Profile and Interface Bindings

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-250, SWIM-DEFN-255

Quantitative Volcanic Ash Information Subscription and Request Service Request Interface

SWIM TI profile and interface bindings	profile name	EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile
	profile version	1.1
	selected service interface binding	WS_LIGHT
	selected network interface binding	The service shall use the network bindings of the SWIM TIYP.
	description	The interface shall use at least one of the following OGC standards: for services that exchange the meteorological information as resources: OGC API – Environmental Data Retrieval Standard; for services that exchange the meteorological information as coverages: OGC Web Coverage Service (WCS) Interface Standard – Core, version 2.1; for services that exchange the meteorological information as features: OGC Web Feature Service 2.0 Interface Standard;. Note: It is expected that the service will implement the OGC API – Environmental Data Retrieval Standard by November 2026.

Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface

SWIM TI profile and interface bindings	profile name	EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile
	profile version	1.1
	selected service interface binding	WS_LIGHT
	selected network interface binding	The service shall use the network bindings of the SWIM Technical Infrastructure (TI) Yellow Profile.
	description

Quantitative Volcanic Ash Information Subscription and Request Service Distribution Interface

SWIM TI profile and interface bindings	profile name	EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile
	profile version	1.1
	selected service interface binding	SWIM_TI_YP_1_1_AMQP_MESSAGING
	selected network interface binding	The service shall use the network bindings of the SWIM TIYP.
	description	AMQP 1.0 shall be used to distribute messages as explained in the Publish/Subscribe Push MEP: Implementation Guidance.

Service Interface Protocols and Data Format

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-260

service interface protocols and data format

transport / messaging protocols

The service shall use TLS1.2 or later in accordance with EUROCONTROL Specification for SWIM Technical Infrastructure (TI) Yellow Profile.

data format

Info

This is captured at Service Message level (see below).

WS_LIGHT does not mandate a data format. The header expresses what is used.

Service Operations

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-270

Quantitative Volcanic Ash Information Subscription and Request Service Request Interface

Info

title	Explanatory note

The OGC Web Feature Service 2.0 Interface Standard is used to implement the service operations. It is not the intention to repeat the standardised operations here. However, the table below illustrates how the GetFeature operation would look in the context of this service.

Service operations	operation	operation name	GetFeature
		description	The GetFeature operation returns a selection of features from a data store. It responds to a GetFeature Request message with a Quantitative Volcanic Ash Information Message that satisfies the query expressions specified in the request.
		messages	Request, Quantitative Volcanic Ash Information Message

Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface

Service operations

reference

url

Meteorological SWIM Services Subscription Interface Standard

description

The standard operations for subscription and subscription management.

The following operation shall be implement at a minimum:

subscribe
unsubscribe

Quantitative Volcanic Ash Information Subscription and Request Service Distribution Interface

Service operations	operation	operation name	publish
		description	This operation allows the service provider to publish Quantitative Volcanic Ash Information Warning to service consumers based on their subscriptions.
		messages	Quantitative Volcanic Ash Information Warning

Service Messages

Status

colour	Red
title	WORKING

Info

title	Explanatory note

The OGC Web Feature Service 2.0 Interface Standard details the basic messages such as request and response messages. It is not the intention to repeat the standardised messages here. The table below provides extra details for the Quantitative Volcanic Ash Information Message.

Info

title	Trace

SWIM-DEFN-280

service messages	message	name	Quantitative Volcanic Ash Information Message
		description	The output message containing thequantitative volcanic ash information.
		direction	Out
		data format	QVA information will be provided in two file formats: ICAO’s Meteorological Information Exchange Model (IWXXM) format containing a collection of features. TBD: Check version number. volcanic ash volcano 4 polygons (horizontal + upper/lower FL)/threshold IWWX: states the threshold - ashDensityEqualsOrExceeds Note: expected threshold values 0.2+, 2+, 5+, 10+ mg/m3 ; NetCDF file containing gridded volcanic ash concentration data. TBD: check if possible to agree Note: a common file name conventionjust gives the concentration - there is no assignment to low, medium, etc naming convention may be considered.
	message	name	Request
		description	Request message submitted to the service containing query expressions for the WFS GetFeature operation or the EDR HTTP GET operation and the required data format for the Quantitative Volcanic Ash Information Message.
		direction	In
		data format	JSON and/or XML
	message	name	Quantitative Volcanic Ash Information Warning
		description	The alert and way to access the Quantitative Volcanic Ash Information Message.
		direction	Out
		data format	JSON and/or XML
	reference	url	Meteorological SWIM Services Subscription Interface Standard
	reference	description	The standard messages for subscription and subscription management.

Information Definition (Minimum) and (Extended)

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-290, SWIM-DEFN-300

information definition

The service shall offer information in accordance with the IWXXM QVA schema for feature collections and .

The service shall offer information in accordance with the NetCDF 4 specification for gridded data.

Note: the IWXXM QVA schema is expected to be included in the 2025-2 IWXXM release. It is expected to provide the structure for the volcanic ash cloud, the volcano and concentration according to expected threshold values of 0.2+, 2+, 5+, 10+ mg/m3.

Filter Encoding

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-310

filter encoding

The Quantitative Volcanic Ash Information Subscription and Request Service Request Interface shall support filtering by volcano number (IAVCIE number) and forecast timestep.

The Quantitative Volcanic Ash Information Subscription and Request Service Request Interface shall support filtering of probabilistic information based on the ash concentration threshold.

The Quantitative Volcanic Ash Information Subscription and Request Service Request Interface shall support filtering based on the data set type.

The Quantitative Volcanic Ash Information Subscription and Request Service Request Interface may support filtering based on geographic bounding box and flight level.

... support the BBOX spatial operator defined in the OGC Filter Encoding 2.0 Encoding Standard.

The Quantitative Volcanic Ash InformationSubscription and Request Service Subscription Interface shall allow for the selection of subscription based on clearly defined criteria.

Machine-Readable Service Interface Definition

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-320

Info

title	Explanatory note

This field is left empty. No machine-readable service interface definition is provided.

machine-readable service interface definition	reference

Model View

Status

colour	Red
title	WORKING

Info

title	Trace

SWIM-DEFN-330

Info

title	Explanatory note

This field is left empty. No model view is provided.

model view	reference

Abbreviations and Acronyms

Status

title	TBD

Info

title	Trace

SWIM-DEFN-350

abbreviations and acronyms	abbreviation	code	AMQP
	abbreviation	term	Advanced Message Queuing Protocol
	abbreviation	code	API
	abbreviation	term	Application Programming Interface
	abbreviation	code	CTA
	abbreviation	term	Control area
	abbreviation	code	EU
	abbreviation	term	European Union
	abbreviation	code	FIR
	abbreviation	term	Flight information region
	abbreviation	code	ICAO
	abbreviation	term	International Civil Aviation Organization
	abbreviation	code	MEP
	abbreviation	term	Message Exchange Pattern
	abbreviation	code	OGC
	abbreviation	term	Open Geospatial Consortium
	abbreviation	code	SIGMET
	abbreviation	term	Information concerning en-route weather phenomena which may affect the safety of aircraft operations.
	abbreviation	code	TI
	abbreviation	term	Technical Infrastructure
	abbreviation	code	TIYP
	abbreviation	term	Technical Infrastructure Yellow Profile
	abbreviation	code	TLS
	abbreviation	term	Transport Layer Security
	abbreviation	code	UIR
	abbreviation	term	Upper flight information region

Appendix A: References

Status

title	TBD

Info

title	Trace

This is not traced to a requirement.

references	reference	title	EU Implementing Regulation 2021/116 - Common Project One
		version	1 February 2021
		description	Commission Implementing Regulation (EU) 2021/116 of 1 February 2021 on the establishment of the Common Project One supporting the implementation of the European Air Traffic Management Master Plan provided for in Regulation (EC) No 550/2004 of the European Parliament and of the Council, amending Commission Implementing Regulation (EU) No 409/2013 and repealing Commission Implementing Regulation (EU) No 716/2014.
		url	https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A32021R0116
		document type
	reference	title	Commission Implementing Regulation (EU) 2017/373
		version	1 March 2017 (as amended)
		description	Commission Implementing Regulation (EU) 2017/373 of 1 March 2017 laying down common requirements for providers of air traffic management/air navigation services and other air traffic management network functions and their oversight, repealing Regulation (EC) No 482/2008, Implementing Regulations (EU) No 1034/2011, (EU) No 1035/2011 and (EU) 2016/1377 and amending Regulation (EU) No 677/2011.
		url	https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A02017R0373-20230126
		document type
	reference	title	Acceptable Means of Compliance (AMC) and Guidance Material (GM) to Part-MET
		version	14/03/2022
		description
		url	https://www.easa.europa.eu/en/document-library/acceptable-means-of-compliance-and-guidance-materials/group/part-met#part-met
		document type
	reference	title	OGC API – Environmental Data Retrieval Standard
		version	1.1
		description	OGC API standards define modular API building blocks to spatially enable Web APIs in a consistent way. The OpenAPI specification is used to define the API building blocks.
		url	https://www.ogc.org/standard/ogcapi-edr/
		document type
	reference	title	OGC Web Coverage Service (WCS) Interface Standard
		version	version 2.1
		description	A Web Coverage Service (WCS) offers multi-dimensional coverage data for access over the Internet. WCS Core specifies a core set of requirements that a WCS implementation must fulfill.
		url	https://www.ogc.org/standard/wcs/
		document type
	reference	title	OGC API - Coverages
		version
		description	The OGC API - Coverages draft specification defines a Web API for accessing coverages that are modeled according to the Coverage Implementation Schema (CIS) 1.1
		url	https://ogcapi.ogc.org/coverages/
		document type
	reference	title	OGC Web Feature Service 2.0 Interface Standard
		version
		description	WFS offers direct fine-grained access to geographic information at the feature and feature property level. Note: This is equivalent to ISO 19142 - Geographic Information - Web Feature Service.
		url	https://www.ogc.org/standard/wfs/
		document type
	reference	title	OGC API – Features
		version
		description	OGC API Features provides API building blocks to create, modify and query features on the Web.
		url	https://www.ogc.org/standard/ogcapi-features/
		document type
	reference	title	OGC Filter Encoding 2.0 Encoding Standard
		version
		description	This jointly developed OGC and ISO TC/211 International Standard describes an XML and KVP encoding of a system neutral syntax for expressing projections, selection and sorting clauses collectively called a query expression. These components are modular and intended to be used together or individually by other standards which reference this International Standard. Note: This is equivalent to ISO 19143 - Geographic Information - Filter encoding.
		url	https://www.ogc.org/docs/is
		document type
	reference	title	Message Exchange Patterns: Identification Guidelines
		version	JULY 2nd, 2019
		description	Document intended to facilitate the understanding of message exchange patterns from an application and Technical Infrastructure perspective.
		url	https://reference.swim.aero/technical-infrastructure/message-exchange-patterns-identification-guidelines.html
		document type	SERVICE_BEHAVIOUR_DESCRIPTION
	reference	title	Publish/Subscribe Push MEP: Implementation Guidance
		version	JULY 2nd, 2019
		description	This document intends to serve as implementation guidance of the Publish/Subscribe Push Message Exchange Pattern using SWIM-TI Yellow Profile Service Bindings.
		url	https://reference.swim.aero/technical-infrastructure/guidance-for-pub-sub-push-implementation.html
		document type

Version	Old Version 20	New Version 21
Changes made by	WILSON Scott	WILSON Scott
Saved on	2024 Apr 03	2024 Apr 03

Page Comparison

Versions Compared

Key

Service Definition Identification

Service Identification

Service Abstract

Service Definition Provider

Geographical Extent of Information

Service Categories

Service Standard Reference

Operational Environment

Service Functions

Service Access and Use Conditions

Security Constraints

Quality of Service

Quality of Data

Source of Information

Service Validation Information

Application Message Exchange Pattern

Service Behaviour

Synchronous Request/Reply

Asynchronous Request/Reply

Service Monitoring

Service Interfaces

SWIM TI Profile and Interface Bindings

Quantitative Volcanic Ash Information Subscription and Request Service Request Interface

Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface

Quantitative Volcanic Ash Information Subscription and Request Service Distribution Interface

Service Interface Protocols and Data Format

Service Operations

Quantitative Volcanic Ash Information Subscription and Request Service Request Interface

Quantitative Volcanic Ash Information Subscription and Request Service Subscription Interface

Quantitative Volcanic Ash Information Subscription and Request Service Distribution Interface

Service Messages

Information Definition (Minimum) and (Extended)

Filter Encoding

Machine-Readable Service Interface Definition

Model View

Abbreviations and Acronyms

Appendix A: References