This paper describes the definitions of e-discovery tools and reviews the existing literature on EBSCO discovery services, Worldcat Local, Summon, Ex Libris Primo, etc. It analyses them and the creation of cumulative indexes for searching the different types of databases like OPAC, publishers DBs, Open Access data and the different types of features available in each of the e-discovery tools. It also studied the library professionals' involvement and the user's satisfaction towards the usage of e-discovery tools. The study emphasized the assistance required for the users, particularly in relation to the need to evaluate information. Web-scale discovery creation by LIS professionals is an innovation in online searching of library collections. Many libraries are currently adopting discovery systems, but few have begun to explore and recognize the potential for a new era of instructional possibilities. The features are explained with the use of Worldcat, the EBSCO Discovery Services (EDS), Summon, VuFind and the benefits of other discovery tools such as Primo by library staff.
A discovery tool can be defined as “web software that searches journal-article and library-catalog metadata in a unified index and presents search results in a single interface” (Fagan, Mandernach, Nelson, Paulo and Saunders, 2012). Unlike a federated search tool, discovery tools import metadata into one central index and apply a single relevancy ranking and search algorithm to the index to retrieve and display results.
A discovery tool is often referred to as a stand-alone OPAC, a discovery layer, a discovery layer interface, an OPAC replacement, or the next generation catalog (NGC). Unlike the front-end of an integrated library system or ILS OPAC, a discovery tool is defined as a third party component whose purpose is to “provide search and discovery functionality and may include features such as relevance ranking, spell checking, tagging, enhanced content, search facets” (OLE Project, 2009).
A next-generation catalog/discovery tool is an interface that interacts with a library’s existing Integrated Library System (ILS) to display data in different ways than the “traditional” online catalog (OPACs) or the public interface that accompanies an ILS.