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XDS is a program package written for the "reduction" of 2-dimensional data images ("frames") obtained from crystals irradiated with monochromatic X-rays. The package mainly consists of the programs [[XDS]] (which processes a single dataset), [[XSCALE]] (for scaling of several datasets) , and [[XDSCONV]] (for conversion of a reflection output file to other formats). Additional auxiliary programs are [[cellparm]], [[2cbf]] and [[merge2cbf]]. [[XDS-viewer]], for visualizing frames, can be downloaded separately (see [[Installation]]).
The author of the program package is Wolfgang Kabsch (Wolfgang dot Kabsch at mpimf-heidelberg dot mpg dot de); since 2007 I contribute code, handle and fix bugs and teach XDS usage.
The program is free for academic use, and can be downloaded from http://wwwxds.mpimf-heidelberg.mpg.de/~kabsch/xds/html_doc/downloading.html (if the download from that site fails, there's a copy at ftp://turn5.biologie.uni-konstanz.de/xds ).
Documentation is at http://wwwxds.mpimf-heidelberg.mpg.de/~kabschhtml_doc/xds XDS.html or [http://strucbio.biologie.uni-konstanz.de/~dikay/XDS_html_doc/index.html here].
Since version 30-Jan-2009, the format of the control images written by [[XDS]] (and [[XSCALE]]) [http://www.mpimf-heidelberg.mpg.de/~kabsch/xds/html_doc/Release_Notes.html changed]. An open-source viewer [[XDS-Viewer]] is [http://xds-viewer.sourceforge.net available]for visualization of the control images written by [[XDS]] (and [[XSCALE]]). Latest versions of [[Adxv]] can also visualize XDS output files.
There is another program available, which serves to produce additional output of tables and plots. This is not part of the official XDS package; its name is [[XDSSTAT]] (written and distributed by Kay Diederichs). Yet another program that produces frame-wise (for XDS_ASCII.HKL) or dataset-wise (for XSCALE.HKL) CC<sub>1/2</sub> statistics is [[XDSCC12]].
[[XDSGUI]], a graphical user interface, serves to help using XDS.