xfree

This is a PROMISE Software Engineering Repository data set made publicly available in order to encourage repeatable, verifiable, refutable, and/or improvable predictive models of software engineering.

1. Title: XFree86 Repository Transaction Data

2. Sources: (a) Original creators of database: Bart Massey 01 503 725-5393 Computer Science Dept. PO Box 751 MS CMPS Portland State University Portland, OR USA 97207-0751 bart@cs.pdx.edu

(b) Donor of database: owner

(c) Date received: 31 March 2005

1. Past Usage: none

2. Relevant Information:

This dataset was assembled by analyzing the publicly-available CVS archives of the XFree86 Project http://xfree86.org)) using a modified version of CVSAnalY (https://github.com/MetricsGrimoire/CVSAnalY) It is intended for a wide variety of uses, and thus no dependent variable is specified. See Massey’s PROMISE 2005 paper, “Longitudinal Analysis of Long-Timescale Open Source Repository Data”, for further information. Note that on 487 occasions, a negative lines-added count was recorded by CVSAnalY, apparently due to a bug. These entries should probably be repaired or at least filtered out.

1. Number of Instances: 175658

2. Number of Attributes: 10 (incl. 2 inferred)

3. Attribute information:

   • Inferred filetype:
     • non-numeric—nominal
     • 9 values (documentation,images,i18n,ui,multimedia,code,build,devel-doc,unknown)
   • File Pathname: UNIX relative path name
     • non-numeric—structured
     • 1935 directories, 27009 files
   • Revision: dotted-decimal revision string
     • non-numeric—structured
     • 7182 unique revision numbers
   • Author ID: integer identifier
     • non-numeric—nominal
     • 21 unique authors
   • Lines added: integer
     • numeric—integer
     • MIN: 0 MAX: 699789 MEAN: 124.274 STDEV: 2450.66
     • MIN: 0 MAX: 70554 MEAN: 41.3577 STDEV: 407.737
     • (excl. images, multimedia)
     • Note: on 487 occasions, a negative lines-added count was recorded by CVSAnalY, apparently due to a bug. In the summary statistics reported in this comment, these additions are not counted.
   • Lines removed: integer
     • numeric—integer
     • MIN: 0 MAX: 123751 MEAN: 27.8503 STDEV: 624.008
     • MIN: 0 MAX: 55664 MEAN: 17.3073 STDEV: 294.047
     • (excl. images, multimedia)
   • File has since been removed (“in Attic”): boolean (0, 1)
     • non-numeric—nominal
     • 40.67% positive
   • Commit has CVS_SILENT flag: boolean (0, 1)
     • non-numeric—nominal
     • never set
   • Inferred that committer was not author: boolean (0, 1)
     • non-numeric—nominal
     • 1.04% positive
   • Commit date: date
     • MIN: “1994-04-27 07:07:10” MAX: “2005-02-19 02:22:07”
     • Note: CVS has trouble with timezones; we assume all dates are UTC.

4. Missing Attribute Values:

• unknown inferred filetype (attr 1): 18719

1. Class Distribution: N/A