Jean-Yves Le Meur

CERN document server: Document management system for grey literature in a networked environment

ConclusionIn this paper we briefly described the current status of research in the field of digital libraries interoperability, mainly with respect to federated data processing such as permitted within the Open Archive Initiative framework. We then presented the CERN Document Server Software suite that is a free software package main-tained by CERN providing an online digital library solution for mid- to large-sized document repositories. The set of CDSware modules was described and the differ-ences with other existing tools briefly mentioned. Finally we have mentioned a typical usage statistics illustrating the scope of grey literature and networked con-ditions of the CERN Document Server.We pointed out that the current trend in grey literature management goes toward institutional repositories build upon the distributed and federated model. Further research is going on within the CDS collaboration in this area, focused particularly on (i) semantic interoperability using ontologies in distributed and federated data processing and (ii) ranking technologies when searching grey literature in OAI compliant repositories.

Citation graph based ranking in Invenio

Invenio is the web-based integrated digital library system developed at CERN. Within this framework, we present four types of ranking models based on the citation graph that complement the simple approach based on citation counts: time-dependent citation counts, a relevancy ranking which extends the PageRank model, a time-dependent ranking which combines the freshness of citations with PageRank and a ranking that takes into consideration the external citations. We present our analysis and results obtained on two main data sets: Inspire and CERN Document Server. Our main contributions are: (i) a study of the currently available ranking methods based on the citation graph; (ii) the development of new ranking methods that correct some of the identified limitations of the current methods such as treating all citations of equal importance, not taking time into account or considering the citation graph complete; (iii) a detailed study of the key parameters for these ranking methods.

Afficher les documents scientifiques sur le Web

CERN daily handles a large number of research documents, mostly marked up in LATEX and coming from many Internet servers. Our aim is to make them easily locatable on the Web with the help of the CERN Librarys Preprint Catalogue in several formats (PostScript, pdf, gif). We review the conversion procedures and give some details on some massive production trial runs to directly generate html from the TEX sources. We conclude with a discussion of recent developments in the framework of the xml (and mml) e orts which should ease the support of mathematics formulae in Web browsers. Présenté à la dixième conférence TEX européenne à Saint-Malo du 29 mars – 1 avril 1998 Publié dans les actes : Cahiers GUTenberg 28–29, pages 181–196. a. ) IT Division, <Michel.Goossens@cern.ch> b. ) AS Division, <Jean-Yves.Le.Meur@cern.ch> 1 Le catalogue des preprints du CERN 1.