Section: Software and Platforms

Web Usage Mining

AWLH for Pre-processing Web Logs

Participants : Yves Lechevallier [co-correspondent] , Brigitte Trousse [co-correspondent] .

AWLH (AxIS Web Log House) for Web Usage Mining (WUM) is issued from AxISLogMiner software which implements the mult-site log preprocessing methodology and extraction of sequential pattern with low support developed by D. Tanasa in his thesis [72] , [15] for Web Usage Mining (WUM). In the context of the Eiffel project (2008-2009), we isolated and redesigned the core of AxISlogMiner preprocessing tool (we called it AWLH) composed of a set of tools for pre-processing web log files. The web log files are cleaned before to be used by data mining methods, as they contain many noisy entries (for example, robots requests). The data are stored within a database whose model has been improved.

So AWLH offers:

• Processing of several log files from several servers,

• Support of several input formats (CLF, ECLF, IIS, custom, etc.),

• Incremental pre-processing,

• Java API to help integration of AWLH in external application.

ATWUEDA for Analysing Evolving Web Usage Data

Participants : Yves Lechevallier [co-correspondent] , Brigitte Trousse [co-correspondent] .

ATWUEDA for Web Usage Evolving Data Analysis [52] [4] was developed by A. Da Silva in her thesis [52] under the supervision of Y. Lechevallier. This tool was developed in Java and uses the JRI library in order to allow the application of R which is a programming language and software environment for statistical computing functions in the Java environment.

ATWUEDA is able to read data from a cross table in a MySQL database. It splits the data according to the user specifications (in logical or temporal windows) and then applies the approach proposed in the Da Silva's thesis in order to detect changes in dynamic environment. The proposed approach characterizes the changes undergone by the usage groups (e.g. appearance, disappearance, fusion and split) at each time-stamp. Graphics are generated for each analysed window, exhibiting statistics that characterizes changing points over time.

Version 2. of ATWUEDA (September 2009) is available at Inria's gforge website.

The efficiency of ATWUEDA [46] has been demonstrated by applying it on real case studies such as on condition monitoring data streams of an electric power plant provided by EDF.

ATWUEDA is used by Telecom Paris Tech and EDF [4] .