From 9c63c27c083c842f0dfe344c9d78a5106fbb2bd1 Mon Sep 17 00:00:00 2001 From: Tom Kralidis Date: Fri, 13 Mar 2026 06:35:29 -0400 Subject: [PATCH] update GDC Technical Considerations for metadata archive publishing (#238) --- guide/sections/part2/global-services.adoc | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/guide/sections/part2/global-services.adoc b/guide/sections/part2/global-services.adoc index 3dd9bbe..5858457 100644 --- a/guide/sections/part2/global-services.adoc +++ b/guide/sections/part2/global-services.adoc @@ -170,7 +170,7 @@ In WIS2, Global Caches provide access to WMO core data for data consumers. This * Multiple Global Discovery Catalogues may be deployed for resilience. * Global Discovery Catalogues operate independently of each other; each Global Discovery Catalogue holds all discovery metadata records. Global Discovery Catalogues do not need to synchronize with each other. * A Global Discovery Catalogue is populated with discovery metadata records from a Global Cache and receives messages about the availability of discovery metadata records via a Global Broker. -** The subscription topic shall be ``++cache/a/wis2/+/metadata/#++``. +** The subscription topic shall be ``++cache/a/wis2/+/metadata++``. * A Global Discovery Catalogue should connect to and subscribe to more than one Global Broker to ensure that no messages are lost in the event of a Global Broker failure. A Global Discovery Catalogue will discard duplicate messages as needed. * A Global Discovery Catalogue will verify that a discovery metadata record identifier’s centre-id token (see Manual on WIS, Volume II – Appendix F. WMO Core Metadata Profile (Version 2)) matches the centre-id level of the topic from which it was published (see Manual on WIS, Volume II – Appendix D. WIS2 Topic Hierarchy) to ensure that discovery metadata are published by the authoritative organization. * A Global Discovery Catalogue will validate discovery metadata records against the WCMP2. Valid WCMP2 records will be ingested into the catalogue. Invalid or malformed records will be discarded and reported to the Global Monitor against the centre-id associated with the discovery metadata record. @@ -179,8 +179,8 @@ In WIS2, Global Caches provide access to WMO core data for data consumers. This * A Global Discovery Catalogue will remove discovery metadata that are marked for deletion as specified in the data notification message. * A Global Discovery Catalogue should apply faceting capability as specified in the cataloguing considerations of the WCMP2 specification, as defined in OGC API - Records. * A Global Discovery Catalogue will provide human-readable web pages with embedded markup using the schema.org vocabulary, thereby enabling search engines to crawl and index its content. Consequently, data consumers should be able to discover WIS content via third party search engines. -* A Global Discovery Catalogue will generate and store a zip file of all WCMP2 records once a day; this file will be made be accessible via HTTP. The zipfile will include a directory named after the centre-id of the Global Discovery Catalogue containing all WCMP2 records. -* A Global Discovery Catalogue will publish a WIS2 Notification Message of its zip file of all WCMP2 records on its centre-id's +metadata+ topic (for example, `origin/a/wis2/centre-id/metadata`, where `centre-id` is the centre identifier of the Global Discovery Catalogue). +* A Global Discovery Catalogue will generate and store a zip file of all WCMP2 records once a day; this file will be made be accessible via HTTP. The zip file will include a directory named after the centre-id of the Global Discovery Catalogue containing all WCMP2 records. +* A Global Discovery Catalogue will publish a WIS2 Notification Message of its zip file of all WCMP2 records on its centre-id's +metadata+ topic at `origin/a/wis2/centre-id/metadata`, where `centre-id` is the centre identifier of the Global Discovery Catalogue. * A Global Discovery Catalogue may initialize itself (cold start) from a zip file of all WCMP2 records published. * As a convention, a Global Discovery Catalogue's centre-id will be ``{tld}-{centre-name}-global-discovery-catalogue``.