The source code schema for the Windows Installer XML Toolset Http Extension. Makes a reservation record for the HTTP Server API configuration store on Windows XP SP2, Windows Server 2003, and later. For more information about the HTTP Server API, see HTTP Server API . The access control entries for the access control list. Specifies the behavior when trying to install a URL reservation and it already exists. Replaces the existing URL reservation (the default). Keeps the existing URL reservation. The installation fails. Unique ID of this URL reservation. If this attribute is not specified, an identifier will be generated automatically. Security descriptor to apply to the URL reservation. Can't be specified when using children UrlAce elements. The UrlPrefix string that defines the portion of the URL namespace to which this reservation pertains. The security principal and which rights to assign to them for the URL reservation. Unique ID of this URL ACE. If this attribute is not specified, an identifier will be generated automatically. The security principal for this ACE. When the UrlReservation is under a ServiceInstall element, this defaults to "NT SERVICE\ServiceInstallName". This may be either a SID or an account name in a format that LookupAccountName supports. When using a SID, an asterisk must be prepended. For example, "*S-1-5-18". Rights for this ACE. Default is "all".