What is XDS, and how to obtain it?
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) , XDSCONV (for conversion of output file to other formats) and VIEW (for visualizing).
The author of the program package is Wolfgang Kabsch (Wolfgang dot Kabsch at mpimf-heidelberg dot mpg dot de).
The program is free for academic use, and can be downloaded from http://www.mpimf-heidelberg.mpg.de/~kabsch/xds/html_doc/downloading.html .
Documentation is at http://www.mpimf-heidelberg.mpg.de/~kabsch/xds .
There is another program available, which serves to produce additional output of tables and plots. This is not part of the official XDS package; it's name is XDSSTAT (written and distributed by Kay Diederichs).
Links to XDS papers by Wolfgang Kabsch
- J. Appl. Cryst. (1988). 21, 67-72. Automatic indexing of rotation diffraction patterns. explaining the diffraction geometry as used in XDS, the local-indexing method used in IDXREF and the refinement of diffraction geometry parameters.
- J. Appl. Cryst. (1988). 21, 916-924. Evaluation of single-crystal X-ray diffraction data from a position-sensitive detector. This is the reference for the integration and scaling algorithms employed in the INTEGRATE and CORRECT steps.
- J. Appl. Cryst. (1993). 26, 795-800. Automatic processing of rotation diffraction data from crystals of initially unknown symmetry and cell constants. This builds upon publication 1. and gives further important details of the IDXREF step, in particular about space-group determination.
- Chapters 11.3 and 25.2.9 in International Tables for Crystallography Volume F: Crystallography of Biological Macromolecules
Purpose of the Wiki
The purpose of this Wiki is to provide an accurate resource for XDS users, and to provide explanations and hints for the successful use of XDS. I (Kay Diederichs) try to keep the Wiki up-to-date with XDS versions and insights. I collect Tips and Tricks for XDS usage, explanations of its output, and recommendations for the parameters in XDS.INP (if it appears useful to deviate from their defaults).
To see what's there already, go to List of all pages. A good starting point is the article about XDS.INP where the keywords and parameters for running XDS are described. There is also a wishlist, and Known Bugs, and Quality Control (under construction).