Continuous Integration in Open Source Software Development

Authors: Amit Deshpande, Dirk Riehle

Abstract: Commercial software firms are increasingly using and contributing to open source software. Thus, they need to understand and work with open source software development processes. This paper investigates whether the practice of continuous integration of agile software development methods has had an impact on open source software projects. Using fine-granular data from more than 5000 active open source software projects we analyze the size of code contributions over a project’s life-span. Code contribution size has stayed flat. We interpret this to mean that open source software development has not changed its code integration practices. In particular, within the limits of this study, we claim that the practice of continuous integration has not yet significantly influenced the behavior of open source software developers.

Reference: In Proceedings of the Fourth Conference on Open Source Systems (OSS 2008). Springer Verlag, 2008. Page 273-280.

Available as a PDF file.

SDN: Is there Money in Open Source Services?

IDC’s Matt Lawton recently released a new report about open source adoption:

“However, project vendors, project partners, and vendor partners need to step up and provide support and attendant services in order to move the adoption of OSS from early adopters to the mainstream. Only 12% of all projects are supported by a commercial software vendor, and, incredibly, less than 1% of the projects have attendant services sourced from service providers.” […]

Wow! Open source is in the enterprise, and only 1% of those off-the-shelf software components have attendant services for them?

Continue reading “SDN: Is there Money in Open Source Services?”

Onward! 2008 Call for Papers

Is DNA recombination your inspiration for a new programming language? Or do you simply think it is time to improve generics in Java?

Do you think that we need new paradigms for bringing programming to the masses in Second Life and on Wikipedia? That we need new and significantly more robust systems than before that can function autonomously, perhaps inspired by biological metaphors?

Read more…

Towards End-User Programming With Wikis

Abstract: When business software fails to provide the desired functionality, users typically turn to spreadsheets to perform simple but general computational tasks. However, spreadsheets enforce a view of the world that consists mostly of tables and numbers rather than the domain concepts users have in mind. We are using wikis as a platform for empowering end-users to perform computational tasks of their choice. This paper discusses how core properties of wikis can support end-user programming. We illustrate our approach using wiki prototype software for working with business objects as made available by SAP’s business application suite.

Reference: Craig Anslow, Dirk Riehle. In Proceedings of the Fourth Workshop in End-User Software Engineering (WEUSE IV). IEEE Press, 2008. Page 61-65.

Available as a PDF file.

How to Benefit From Open Source

Title: How to Benefit from Open Source

Presenter: Dirk Riehle

Institution: SAP Research, SAP Labs LLC

Abstract: Open source is changing the game of how software is built and how money is made. This talk analyzes the economics of open source software from three main perspectives: The system integrator perspective, the start-up firm perspective, and the individual software developer perspective. A focus is on the distinction between community open source and commercial open source, and how the different stakeholders use different approaches to win in the market, e.g. to gain market share or to keep a job. The dual-license strategy is explained as well as why committers to important open source software projects can expect a higher salary. The talk shows how every stakeholder can benefit and thereby explains why open source is here to stay.

Event/location: Software Engineering Today 2008 (SET 2008) in Zurich, May 6-7th 2008

Wiki Creole Grammar, Schema, Transformations Made Available

For wiki research purposes as well as the Wiki Creole community‘s convenience, we are making our EBNF grammar, the XML schema definition, and the to/from XML transformations available. You can use these specifications to create your own wiki parsers (using parser generators) as well as use standard technology (DOM, XSLT) to work with wiki pages and display or save them.

For more, see the dedicated wiki-creole page.

An XML Interchange Format for Wiki Creole 1.0

Abstract: Wikis have become an important application on the web and in the enterprise, yet there are no interoperability standards between different wiki engines. We present the first complete XML representation format of Wiki Creole 1.0. Wiki Creole is a community standard for wiki markup, the language used to write wiki pages. This report presents the complete XML representation format using a validating XML schema. In addition we present XSLT definitions for transforming the XML representations to XHTML on the one hand and for transforming the XML representations to Wiki Creole markup on the other hand. Our work shows how using XML technologies we can make wiki interchange, wiki upgrading, and wiki conversion independent from a specific wiki engine implementation.

Reference: Martin Junghans, Dirk Riehle, Umit Yalcinalp. In ACM SIGWEB Newsletter, Volume 2007, Issue Winter (Winter 2007), Article No. 5. ACM Press, 2007.

Available as a PDF file.