OGC(r) schema USAGE.txt
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More information on OGC standards may be found at
 http://www.ogc.org/standards/

The most current schema are available at http://schemas.opengis.net/ .

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-- [ USAGE NOTES ] --------------------------------------------------

One reliable and flexible way to use schemas [1] is to
download them [2] locally and use them with an
OASIS XML Catalog [3] (ex. [4]). In this way
the HTTP server is not contacted each time the schema is used.
A benefit of this option is that local client can use the schema
even when offline or when the schema website is offline.

1) http://schemas.opengis.net/
2) http://schemas.opengis.net/SCHEMAS_OPENGIS_NET.zip
3) https://www.oasis-open.org/committees/download.php/14809/xml-catalogs.html
4) http://beta.schemas.opengis.net/catalog.xml

OGC's services strive to achieve higher than 99.95% uptime [5]
but there is no guarantee.

5) https://uptime.is/99.95

The most current OGC schemas are available at http://schemas.opengis.net/ [1].
They are packaged into a zip archive [2] as well as a Tar.GZ archive when
any schema is changed.  Public notice is given via RSS [6].

6) http://schemas.opengis.net/ogc_schema_updates.rss

-- 2020-01-16  Kevin Stegemoller

OGC schemas.opengis.net <http://schemas.opengis.net> [7] now supports HTTPS and
will continue to support HTTP to preserve the historic material previously
published.  OGC has enabled
Upgrade Insecure Requests <http://www.w3.org/TR/upgrade-insecure-requests> [8]
to allow the client to choose to upgrade to HTTPS based on the
Upgrade-Insecure-Requests header.

7) http://schemas.opengis.net
8) http://www.w3.org/TR/upgrade-insecure-requests

There are no plans at this time to enforce server redirection of all HTTP
requests to HTTPS.  This decision will allow older software, which might only
support HTTP and cannot be upgraded, to continue to function while modern
clients will be able to upgrade to a secure connection if they support the
Upgrade-Insecure-Requests header.

Do note that this change has no effect on namespaces. The actual namespace will
continue to use HTTP, even if it is also served through HTTPS. This applies as
well for XMI DTD, Schema, and SGML DTDs resources.

-- 2022-06-20  Kevin Stegemoller

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Policies, Procedures, Terms, and Conditions of OGC(r) are available
  http://www.ogc.org/ogc/legal/ .

Copyright (c) 2022 Open Geospatial Consortium.

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