HP-UX 11i Release Notes (December 2000)

Internet and Networking Services
Low Bandwidth X Extension (LBX)
Chapter 10206
Application Group Extension (XC-APPGROUP)
The application group extension provides new protocol to implement
Application Groups (AppGroups). The AppGroup facility allows other
clients to share the SubstructureRedirect mechanism with the
window manager. This allows another client called the application group
leader, such as a web browser, to intercept a MapRequest made by a third
application and re-parent its window into the web browser before the
window manager takes control. The AppGroup leader may also limit the
screens and visuals available to the applications in the group.
This extension, along with the Netscape remote execution plug-in, allows
Netscape to run programs remotely over the Web with the output
appearing in the Web browser display.
The only way for an application to become a member of an AppGroup is
by using an authorization generated using the new security extension.
Whenever an application connects to the server, the authorization that it
used to connect is tested to see if it belongs to an AppGroup. This means
that the authorization data must be transmitted to the remote host
where the application will be run. In the case of X, HTTP is used to send
the authorization. Sites that have concerns about sending un-encrypted
authorization data such as MIT-MAGIC-COOKIE-1 via HTTP should
configure their web servers and web browsers to use SHTTP or SSL.
SLS/d - Distributed SLS (HP Visualize Center
Support)
SLS/d is an extension of the SLS (Single Logical Screen) functionality
provided by the X server that allows the X desktop to span graphics
displays that reside on distributed systems. By distributing the display
across several systems, a larger logical array of graphics displays can be
achieved than otherwise would be possible with a single system with
multiple graphics cards. SLS/d provides the X Window system support
for part of the 3-D Visualize Center products.
SLS/d involves a low-level change in the X server that unites several
distributed graphics displays into a logical X Window system. The only
user-visible changes are related to system configuration. The X Window
system API remains unchanged in the SLS/d system, and thus is
completely transparent to 2-D X window applications. The motivation