[1] HTMLHelp で使っている URI scheme。
hcp:
とは違って、 WinIE そのものの画面でも表示できますが、 >>7 と >>8 の理由により使い物になりません。 (そうする理由も無いですね、べつに。)ms-its:
は WinIE4 世代から実装されています。 WinIE3 世代はもっぱら mk:
scheme を使っていました。[14] INFO: HTML Help URL Protocols ( 版) <https://support.microsoft.com/en-us/kb/235226>
Anything after the double colon (::) must use forward slashes (/), in accordance with URL standards. Normally, backslashes (\) are used only when specifying a file path that is before the double colon (::). However, using forward slashes before the double colon (::) is still allowed.
The following is a list of correct HTML Help URLs:
Filename.chm::/page.htm - Only works inside of HTML Help. Microsoft strongly discourages its use (also known as "super-automagic" URL).
Mk:@MSITStore:filename.chm::/page.htm - The standard HTML Help URL that works with Internet Explorer 3.0 and later (also known as "automagic" URL).
Ms-its:filename.chm::/page.htm - The new standard HTML Help URL that works with Internet Explorer 4.0 and later (also know as "automagic" URL).