diff --git a/transition-guide/wis2-transition-guide-DRAFT.docx b/transition-guide/wis2-transition-guide-DRAFT.docx index 68ab0ed..87a8e3d 100644 Binary files a/transition-guide/wis2-transition-guide-DRAFT.docx and b/transition-guide/wis2-transition-guide-DRAFT.docx differ diff --git a/transition-guide/wis2-transition-guide-DRAFT.html b/transition-guide/wis2-transition-guide-DRAFT.html index 07b0180..7bf5bff 100644 --- a/transition-guide/wis2-transition-guide-DRAFT.html +++ b/transition-guide/wis2-transition-guide-DRAFT.html @@ -455,7 +455,7 @@

Provisions for the transition from the WMO Information System (WIS) 1.0 and

World Meteorological Organization

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Date: 2024-07-23

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Date: 2024-07-31

Version: 2024-07-15-approved by EC-78

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3.2.1 Purp

When a National Meteorological Centre (NMC), running a Message Switching System and exchanging data on the GTS, has implemented WIS2, it may wish to stop sending its data directly on the GTS so that it can stop the MSS.

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The WIS2 to GTS gateway will ensure that only the data currently available on the GTS and whose Member is wishing to stop its MSS will be re-published onto the GTS, so that no data is lost during the transition.

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For a Member that wishes to stop its MSS, the WIS2 to GTS gateway will ensure that only data currently available on the GTS will be re-published on the GTS, so that no data is lost during the transition.

To ensure resilient operation, there will be more than one WIS2 to GTS gateway.

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3.2.3.1 For WIS centres wishing to stop their Message Switching System
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A Member planning to stop GTS transmission shall provide its data in conformance with WIS2 Node operations on WIS2. For data that have previously been available on the GTS, and should continue to be available on the GTS, the GTS Abbreviated Heading Line (AHL) of the bulletin in which the data are to be published needs to be indicated. This is done by including the GTS property in the WIS2 Notification Message (see example in the next paragraph).

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A Member planning to stop GTS transmission shall provide its data in conformance with WIS2 Node operations on WIS2. For data that have previously been available on the GTS, and should continue to be available on the GTS, the GTS Abbreviated Heading Line (AHL) of the bulletin in which the data are to be published needs to be indicated. This is done by including the gts property in the WIS2 Notification Message (see example in the next paragraph).

The gts property enables the WIS2 to GTS gateway operator to easily identify data for republication on the GTS, and the AHL of the associated data. For example:

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Over the transition period, the list of abbreviated headings (TTAAii/CCCC) to relay from WIS2 to GTS will grow when new NMCs plan to stop their MSS. It means that the gateway will require a method that allows for the addition of batches of abbreviated headings when new centres are ready for the transition.

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As it is expected for data consumers, and to ensure resilient operation, the gateway should subscribe to notification messages from multiple Global Brokers.

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To ensure resilient operation, the gateway should subscribe to notification messages from multiple Global Brokers.

During the transition period, other gateways will republish GTS data to WIS2. These GTS to WIS2 gateways will publish via a designated centre-id. To avoid an infinite loop of republication, it is essential that a WIS2 to GTS gateway does not subscribe to notification messages associated with the centre-id of a GTS to WIS2 gateway.

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7.2 Inf

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