LSHC Call for Participation

Large-Scale Hierarchical Classification Workshop European Conference on Information Retrieval 2010

March 28, 2010

The Open University in Milton Keynes, UK



The workshop is associated to the PASCAL 2 Large-Scale Hierarchical Text Classification Challenge. The challenge was completed recently with the very active participation of several teams from around the world. The results are publicly available at:



Hierarchies are becoming ever more popular for the organization of documents, particularly on the Web (e.g. Web directories). Along with their widespread use comes the need for automated classification of new documents to the categories in the hierarchy. Research on large-scale classification so far has focused on large numbers of documents and/or large numbers of features, with a limited number of categories. However, this is not the case in hierarchical category systems, such as DMOZ. Approaching this problem, either existing large-scale classifiers can be extended, or new methods need to be developed. The goal of this workshop is to discuss and assess some of these strategies. In particular some of the issues that we expect to cover in the workshop are:

* Learning to classify against many categories.
* Data sparseness in the presence of large datasets.
* Use of the statistical dependence of hierarchically organized classes.
* The role of shrinkage methods in large hierarchies.
* Ensemble methods for hierarchical classification.
* Extending existing large-scale classifiers to hierarchies.
* Challenging hierarchical classification tasks and datasets.



    * Paper submission - January 18
    * Acceptance notification - February 15
    * Final paper - March 5



We expect submissions by the various teams who have participated to the LSHTC challenge. At the same time, we strongly encourage submissions from researchers not participating to the challenge. The Easychair electronic submission system will be used for the papers. Please, refer to the workshop page for details about the submission format and process.



Eric Gaussier, LIG, Grenoble, France
George Paliouras, NCSR "Demokritos", Athens, Greece
Aris Kosmopoulos, NCSR "Demokritos" and AUEB, Athens, Greece
Sujeevan Aseervatham, LIG, Grenoble, France