Ranking Web of World Repositories

From: Isidro F. Aguillo <isidro.aguillo_at_CCHS.CSIC.ES>
Date: Tue, 27 Jan 2009 10:32:00 +0100

The January edition of the Ranking Web of Repositories is just published.


The number of repositories is growing fast worldwide but still many of
them does not have their own domain or subdomain, and for this reason it
is not possible to add them in our analysis. Some institutions maintain
several databases with completely different URLs which penalize the
global visibility they have.

We are still unable to add usage/download statics but there are many
initiatives already working on standardization of the collecting
methods, so we expect that global data could be available soon.

Following several requests we now show two global Rankings. One that
covers all repositories as was shown in previous editions (Top 300), and
a new one that focus only on Institutional Repositories (Top 300

There is a minor change regarding the calculation of the number of rich
files as in this new edition we are using again other formats than pdf
(doc, ppt, ps) to obtain the data. Contrary to the methodology we used
to make the other Rankings, the figures for rich files are combined and
not treated individually.

The French HAL central repository, and its subsets like INRIA, Social
Sciences and Humanities (HAL-SHS) or IN2P3, are at the top of the
institutional repository list.

Important repositories like PubMedCentral, CiteSeerX and
Smithsonian/NASA Astrophysics Data System, do not use standard suffixes
to design their contents (e.g. papers in acrobat format with file names
which extension is not .pdf). This is a bad practice as it reduces the
visibility of these documents to the search engines.

Our policy is not to include collectors or metarepositories, with one
exception which is DiVa, the interface that the Uppsala University
provides to more than 20 Nordic repositories. Many of these institutions
do not have their own systems but link their contents to the DiVa
portal. Unfortunately, this means that many of the papers are under
different domains and then they do not contribute to the DiVa's rank.

Isidro F. Aguillo
Cybermetrics Lab
Albasanz, 26-28, 3C1. 28037 Madrid. Spain
Ph. 91-602 2890. Fax: 91-602 2971
isidro.aguillo _at_ cchs.csic.es
www. webometrics.info
Received on Tue Jan 27 2009 - 11:24:17 GMT

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