j661提供了一个通用的CDS（或ARINC661服务器），以方便对ARINC661标准的概念和体系结构进一步认识了解，并促进了ARINC661规范和项目之间的再使用。 CDS架构的设计目的是以便于定义服务器的性能，并能够易于修改和扩展。这是通过在运行模块式插件体系结构而得到实现，并且在不改变服务器核心的情况下允许定制运行时间。
j661 0.50.1 Beta 3版本修复了几个bug，这个版本可能是0.50.1最终发布版本之前的最后一个测试版，并且应该只是重新包装而不需更改任何代码。
Version 0.50.1 Beta 3 详细的更新日志：
－Add unit tests for parsing binary Definition ">Files.
－The enumerate values for the A661_LEGEND_POSITION attribute of the A661_NUMERIC_READOUT widget were different from those finalized by the committee.
－Replace the "long" type by "ulong" for the ulong attributes in the widgets XML definition file. Remark that the "ulong" type has already been taken into account in the previous Beta, and this change had no impact on the resulting binary Definition Files or Runtime protocol.
－Fix a bug in the A661_GP_POLYLINE renderer implementation which prevented to change the color of this widget and go back to the color defined in the Definition File.
－Fix a bug which moved incorrectly the vertices of a A661_GP_POLYLINE widget if some modified coordinates where negative.
－Fix a bug which could cause changes for enumeration values in the Client or the Editor not to be seen in the Client or the Editor in some cases.
－Fix a bug which could cause changes for the A661_LEGEND_POSITION attribute of the A661_NUMERIC_READOUT widget, or more generally attributes of the char or uchar type which had consequences in the layout of their corresponding widget, not to be seen by the corresponding widget renderer in some cases.
下载地址：
http://sourceforge.net/projects/j661/files/Version%200.50.1/j661-bin-0.50.1-Beta-3.zip/download
http://sourceforge.net/projects/j661/files/Version%200.50.1/j661-src-0.50.1-Beta-3.zip/download
http://sourceforge.net/projects/j661/files/Version%200.50.1/j661-tests-0.50.1-Beta-3.zip/download