Visualizing contributions in a forge -Case study on PicoForge
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Visualizing contributions in a forgeCase study on PicoForge
Olivier BERGER, Quang-Vu DANGTELECOM & Management SudParis (ex. GET/INT)INF Departement<olivier.berger@itsudparis.eu>
10/09/2008WOPDASD @ OSS 2008Milano (Italy)
Olivier BERGERPage 2 WOPDASD @ OSS 2008
Summary
IntroductionSemantic Web standards (RDF)Visualizing contributions in a forgeCase study on PicoForge
Olivier BERGERPage 3 WOPDASD @ OSS 2008
Context of Vu's PhD thesis
OSS Software development• Collaborative development environments : Forges• Provide collaborative tools: Source versioning,
Mailing list, Wiki, Bug tracker, forum, chat ...
Missing features• Give users a vision of the project's status• Provide visualisations about the process of
production• Predict the evolution of project and community
Olivier BERGERPage 4 WOPDASD @ OSS 2008
Objective of Vu's PhD thesis
Measuring software quality by focusing on process• Find metrics to measure quality of the process• Find relationship between the quality of the product and
the quality of the process
Develop a “Supervision” Tool in a forge• Help to improve community awareness• Provide indicator for analysis of process/product quality
Olivier BERGERPage 5 WOPDASD @ OSS 2008
Plug analysis tools to forges : RDF
svn ...bug svn ...bugData public
Tools
Results
CVSAnalyMailingListStatsSLOCCount...
[http://flossmetrics.org/sections/deliverables/docs/deliverables/WP2/D2.1-Retrieval_System_Design.pdf]
Olivier BERGERPage 6 WOPDASD @ OSS 2008
Data collection approach
Extract and standardize semantical data from collaborative tools• Forge's tools provide RSS feeds to track activity• A RSS item is the result of an action
Enrich information in the RSS/RDF semantically• using FOAF, DOAP, DC, etc.
Collect all RSS feeds of a project
Olivier BERGERPage 7 WOPDASD @ OSS 2008
New potential ?
Live information
Across tools, across platform=> Real time and complete vision about project and
community
Using Semantic Web standards => Publish semantic notifications of project activity
Olivier BERGERPage 8 WOPDASD @ OSS 2008
What Is RDF?
Resource Description Framework• RDF Graph: a set of RDF Triples• RDF Triples: a 3-tuple: (Subject, Predicate, Object)• XML format using predefined vocabularies• Predicates typed in Schemas
General Standards : schemas• RDF (RDFS, etc.) : RDF machinery• Dublin Core (DC) : documentation meta-info• RSS 1.0 : news• + Your own schemas (consensus / standard)
Brings semantic “namespaces” to XML documents
Olivier BERGERPage 9 WOPDASD @ OSS 2008
<?xml version="1.0"?><rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:ex="http://example.org/stuff/1.0/"> <rdf:Description rdf:about="http://www.w3.org/TR/rdf-syntax-grammar" dc:title="RDF/XML Syntax Specification (Revised)"> <ex:editor> <rdf:Description ex:fullName="Dave Beckett"> <ex:homePage rdf:resource="http://purl.org/net/dajobe/"/> </rdf:Description> </ex:editor> </rdf:Description></rdf:RDF>
RDF Model Example
Olivier BERGERPage 10 WOPDASD @ OSS 2008
RSS
RSS: Web content syndication format (Really Simple Syndication)• channel: title, description, link,...• item: title, description, link, pubDate, author ...
RSS 1.0: RDF Site Summary• Extensible with other RDF standards
0.91 0.92 2.0 Atom
0.9 1.0
Simple: Plain XML
Extensible: RDF/XML
Olivier BERGERPage 11 WOPDASD @ OSS 2008
Friend Of A Friend (FOAF)
XML/RDF Schema to describe people and the relationships between them and the things they create and do
FOAF Basics• foaf:name, foaf:nick, foaf:mbox, ...
Personal Information• foaf:knows, foaf:currentProject, foaf:publications,
foaf:topic_interest, ...
[http://xmlns.com/foaf/spec/]
Olivier BERGERPage 12 WOPDASD @ OSS 2008
Olivier BERGERPage 13 WOPDASD @ OSS 2008
[http://xml.mfd-consult.dk/foaf/explorer/]
Olivier BERGERPage 14 WOPDASD @ OSS 2008
Description Of A Project (DOAP)
XML/RDF schema to describe software projects and in particular open source projects.
Vocabulary• name, homepage, description, created,mailing-list ...• developer, maintainer, translator ... • repository, bug-database, screenshots,
release/version ...DOAP stores
• http://doapstore.org/ and http://doapspace.org/• http://www.sourcekibitzer.org/
[http://trac.usefulinc.com/doap]
Olivier BERGERPage 15 WOPDASD @ OSS 2008
Olivier BERGERPage 16 WOPDASD @ OSS 2008
Olivier BERGERPage 17 WOPDASD @ OSS 2008
RSS Example
<rss:channel> <rss:title>projetA</rss:title> <rss:description>
WebSVN RSS feed – projetA </rss:description> <rss:link>http://forgedemo.org/projetA.html </rss:link> <doap:Project> <doap:name>projetA</doap:name> <rdfs:seeAlso>
http://forgedemo.org/projetA.rdf </rdfs:seeAlso> </doap:Project></rss:channel>
Olivier BERGERPage 18 WOPDASD @ OSS 2008
RSS Example
<rss:item> <rss:title>minor fixes in version 2 branch </rss:title> <rss:link>http://forgedemo.org/projetA</rss:link> <rss:description> Rev 2463 - toto (3 file(s) modified) minor fixes in version 2 branch</rss:description> <foaf:person>
<foaf:nick>toto</foaf:nick><foaf:mbox>[email protected]</foaf:mbox><rdfs:seeAlso>http://forgedemo.org/toro.rdf</rdfs:seeAlso>
</foaf:person> <dc:date>Mon, 02 Jun 2008 22:18:02</dc:date></rss:item>
Olivier BERGERPage 19 WOPDASD @ OSS 2008
Data analysis
Metrics• The total number of actions• Number of active members with the number of
actions of each members• Number of used tools with numbers of actions in each
toolConstructing Social Network
• Heterogeneous relationships: co-commit on SVN, co-drafting on Wiki or discussion on mailing list, bug tracker
Activity Pattern Analysis• monthly activity, daily activity, hourly activity
Olivier BERGERPage 20 WOPDASD @ OSS 2008
Supervision tool on PicoForge
DirectoryLDAP
PortalProject
TWiki Sympa WebSVN Mantis
Publicfeeds
Semantic DataBase
RDF Document
RSS Document
FOAF Document
DOAP Document
Supervisionmodule
Olivier BERGERPage 21 WOPDASD @ OSS 2008
Supervision tool on PicoForge
Implementation• RSS_PHP [http://rssphp.net/]
- RSS/XML parser using DOMDocument
• RAP [http://www4.wiwiss.fu-berlin.de/bizer/rdfapi/]- RDF API for PHP- parse, store, query, manipulate, serialize and serve RDF
• LibChart [http://naku.dohcrew.com/libchart/]- a PHP library to create charts such as Bar charts (horizontal or
vertical), Line charts, Pie charts
• TouchGraph [http://www.touchgraph.com/]- visualization of graphs such as social networks
Olivier BERGERPage 22 WOPDASD @ OSS 2008
First results
Olivier BERGERPage 23 WOPDASD @ OSS 2008
First results
Olivier BERGERPage 24 WOPDASD @ OSS 2008
Conclusion
RDF may provide a realtime feed of open source projects/process facts from forges to analysis tools
Integration in researchers' workflows ?Semantics information (standardization ?)Feedback to the communities realtimeBetter community awarenessCalibration of research methodology (feedback
from developpers) ?Privacy issues ?Use of other meta-info formats
(microformats ?)
WOPDASD @ OSS 2008
Copyright / license
This presentation is Copyright :• Quang Vu DANG• Olivier BERGER• Institut TELECOM, SudParis
License• This work is licensed under a Creative Commons
Attribution-Share Alike 2.5 License.• (The license can be found in
http://creativecommons.org/licenses/by-sa/2.5/)