Item719: Support.UpgradingFromOlderTWikiReleases document missing

The InstallationGuide contains the following text in the "Preparing to install" section:

If you are upgrading from an earlier major version of Foswiki or from an old TWiki version such as Cairo (TWiki 3) you will need the information found in Foswiki:System.UpgradeGuide. There is also a static HTML UpgradeGuide.html included in the root of your Foswiki distribution.

If you are upgrading from a TWiki 4 release, follow the steps described in Foswiki:Support.UpgradingFromOlderTWikiReleases to ensure a safe upgrade without accidentally overwriting your site customizations and data.

However UpgradingFromOlderTWikiReleases does not exist. Is there anything specific to upgrades from TWiki 4 releases versus upgrades from older releases that can be placed in this document? Also, it would seem more logical to group together Foswiki upgrades with TWiki version 4, rather than with versions prior to version 4.

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Under Tasks.Item717, I have commented out references in InstallationGuide to non-existent supplemental documentation; once it has been created, the references can be restored. I also changed the (commented out) section so that upgrades from "an old TWiki version such as Cairo (TWiki 3)" points to Foswiki:Support.UpgradingFromOlderTWikiReleases, as this seems to make more sense. -- IsaacLin - 19 Feb 2009

Also see Item1100 (strictly speaking, not a duplicate of this item as it refers to a different document). UpgradingFromTWiki4x2Releases is referred to from "How difficult will it be to migrate to Foswiki" on WhatTheForkMeans. -- IsaacLin - 19 Feb 2009

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This has been fixed in the System documentation along the way. Closing as no action required.

-- GeorgeClark - 07 Mar 2011