From b21037485a584338b11bcb9c15ed53ce957d8e92 Mon Sep 17 00:00:00 2001
From: xielh <5604895+xielhxie@user.noreply.gitee.com>
Date: Tue, 3 Nov 2020 16:06:22 +0800
Subject: [PATCH] add README.en.md

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+D-Bus 
+
+D-Bus is a message bus system, a simple way for applications to talk to one another. 
+In addition to interprocess communication, D-Bus helps coordinate process lifecycle; it makes it simple and reliable to code a "single instance" application or daemon, and to launch applications and daemons on demand when their services are needed.
+
+D-Bus supplies both a system daemon (for events such as "new hardware device added" or "printer queue changed") and a per-user-login-session daemon (for general IPC needs among user applications).
+Also, the message bus is built on top of a general one-to-one message passing framework, which can be used by any two apps to communicate directly (without going through the message bus daemon). 
+Currently the communicating applications are on one computer, or through unencrypted TCP/IP suitable for use behind a firewall with shared NFS home directories. (Help wanted with better remote transports - the transport mechanism is well-abstracted and extensible.)
+
+The dbus low-level API reference implementation and the D-Bus protocol have been heavily tested in the real world over several years, and are now "set in stone." Future changes will either be compatible or versioned appropriately.
+
+The low-level libdbus reference library has no required dependencies; the reference bus daemon's only required dependency is an XML parser (expat).
+Higher-level bindings specific to particular frameworks (Qt, GLib, Java, C#, Python, etc.) add more dependencies, but can make more assumptions and are thus much simpler to use. 
+The bindings evolve separately from the low-level libdbus, so some are more mature and ABI-stable than others; check the docs for the binding you plan to use.
+
+There are also some reimplementations of the D-Bus protocol for languages such as C#, Java, and Ruby. 
+These do not use the libdbus reference implementation.
+
+It should be noted that the low-level implementation is not primarily designed for application authors to use. 
+Rather, it is a basis for binding authors and a reference for reimplementations. 
+If you are able to do so it is recommended that you use one of the higher level bindings or implementations. 
+A list of these can be found on the bindings page.
+
+The list of projects using D-Bus is growing and they provide a wealth of examples of using the various APIs to learn from.
+
+D-Bus is very portable to any Linux or UNIX flavor, and a port to Windows is in progress.
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