Many organizations are developing their own institutional
repositories where the faculties / researchers are submitting their copy
of published paper as per respective publisher's policy and giving open access to all in most of the cases.
As per BOAI (Budapest Open Access Initiative) definition, ''Open access'' means its free availability on the public internet, permitting
any users to read, download, copy, distribute, print, search, or link to
the full texts of these articles, crawl them for indexing, pass them as
data to software, or use them for any other lawful purpose, without
financial, legal, or technical barriers other than those inseparable
from gaining access to the internet itself. The only constraint on
reproduction and distribution, and the only role for copyright in this
domain, should be to give authors control over the integrity of their
work and the right to be properly acknowledged and cited.
For
such open access documents CORE (https://core.ac.uk/) is a search
service which contains 126,687,400 open access articles, from over tens
of thousands journals, collected from over 3,673 repositories around the world. It also searches articles published in open access environment by well
known publishers such as Elsevier, Springer etc. Being open access,
documents are available full text.
CORE aggregates
research papers from data providers from all over the world including
institutional repositories, subject-repositories and journal publishers.
This process, which is called harvesting which allows to offer search,
text-mining and analytical capabilities over not only metadata, but also
the full-text of the research papers making CORE a unique service in
the research community.
Note: Information is compiled from the CORE website.