Xds

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XDS is the main program of the XDS program package. Binaries are available for Linux, SGI, Alpha and Mac platforms.

XDS reads the user-supplied file XDS.INP which contains the keywords and parameters for a run of the program. To reduce a dataset, it goes through the steps ("JOB"s)

XYCORR : setup of spatial correction tables if required
INIT : calculate gain of detector and initial background table
COLSPOT : find strong reflections for indexing on one or more frames
IDXREF : index strong reflections in known cell, or supply info about possible cells
DEFPIX : define parts of detector that should be used for intensity integration
INTEGRATE: go through dataset and integrate (= calculate intensities of) all reflections
CORRECT : scale symmetry-related reflections and print out statistics

(additional, optional JOBs are XPLAN and DIRB).

Each step writes a logfile with a name corresponding to the name of the step, with ".LP" appended.

XDS is run simply using

xds

for the single-processor version, and

xds_par

for the parallel version of the program (parallelized using OpenMP). Several instances of the single or parallel version of the program can be run at the same time on the same dataset (see MAXIMUM_NUMBER_OF_JOBS= keyword in XDS.INP).

Xds

See also