<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Israel Herraiz</style></author><author><style face="normal" font="default" size="100%">Gregorio Robles</style></author><author><style face="normal" font="default" size="100%">Jesus M. Gonzalez-Barahona</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Towards Predictor Models for Large Libre Software Projects</style></title><secondary-title><style face="normal" font="default" size="100%">1st International Workshop on Predictor Models in Software Engineering (PROMISE)</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">data mining</style></keyword><keyword><style  face="normal" font="default" size="100%">libre software</style></keyword><keyword><style  face="normal" font="default" size="100%">open source</style></keyword><keyword><style  face="normal" font="default" size="100%">predictor models</style></keyword><keyword><style  face="normal" font="default" size="100%">software evolution</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2005</style></year><pub-dates><date><style  face="normal" font="default" size="100%">05/2005</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://promise.site.uottawa.ca/</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">ACM</style></publisher><pub-location><style face="normal" font="default" size="100%">St. Louis, Missouri, USA</style></pub-location><pages><style face="normal" font="default" size="100%">1–6</style></pages><isbn><style face="normal" font="default" size="100%">-159593-125-2</style></isbn><language><style face="normal" font="default" size="100%">English</style></language><abstract><style face="normal" font="default" size="100%">Libre (free/open source) software provides an ample range of publicly available data sources about its development, which can be retrieved and analyzed. Consequently, it offers a good opportunity to build predictive estimation and evolution models. The main challenge to understand libre software development is that its development nature is radically different from 'classical' in-house software development, common in industry in the last decades. Developers and other human resources are generally a mixture of a few hired developers and many volunteers whose contribution (in number of hours per week and in total time devoted to the project) is not foreseeable in advance. This paper is a first step in finding predictive models in the libre software world. We have studied three data repositories (versioning system, mailing lists and bug tracking system) of GNOME, a large libre software project with several thousand contributors and several millions of lines of code, measuring activity and participation in it during the last years. Results and correlations for these sources allow us to adventure some first estimations of how participation and activity will evolve in the future.</style></abstract><notes><style face="normal" font="default" size="100%">This work has been funded in part by the European Commission, under the CALIBRE CA, IST program, contract number 004337, by the Universidad Rey Juan Carlos under project PPR-2004-42 and by the Spanish CICyT under project TIN2004-07296.</style></notes></record></records></xml>