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This paper aims to propose a toolset that enables individual digital collections owners to satisfy the requirements of aggregators even in cases where their IT and software infrastructure is limited and does not support them inherently. Managers of repositories/digital collections face the challenge of exposing their data via Open Archives Initiative – Protocol for Metadata Harvesting (OAI-PMH) to multiple aggregators and conforming to their possibly differing requirements, for example on output metadata schemas and selective harvesting.

The authors developed a software server that is able to wrap existing systems or even metadata records in plain files as OAI-PMH sources. They analysed the functionality of OAI-PMH data providers in a flow of discrete steps and used a software library to modularise the software for these steps so that the whole process can be easily customised to the needs of each pair of OAI-PMH data provider and service provider. The developed server includes a mechanism for the implementation of schema mappings using an XML specification that can be defined by non-IT personnel, for example metadata experts. The server has been applied in various real-life use cases, in particular for providing content to Europeana.

It has been concluded through real-life use cases that it is indeed possible and feasible in practice to expose metadata records of digital collections via OAI-PMH even when the data sources do not support the required protocols and standards. Even advanced OAI-PMH features like selective harvesting can be supported. Mappings between input and output schemas in many practical cases can be implemented entirely or to a large extent as XML specifications by metadata experts instead of software developers.

Exposing data via OAI-PMH to aggregators like Europeana is made feasible/easier for digital collections owners, even when their software infrastructure does not inherently support the required protocols and standards.

The approach is original and applicable in practice to diverse technology environments, effectively addressing the indisputable fact of the heterogeneity of software and systems used to implement digital repositories and collections worldwide.

The Open Archives Initiative Protocol for Metadata Harvesting (OAI‐PMH) is an evolving protocol and philosophy regarding interoperability for digital libraries (DLs). Previously, “distributed searching” models were popular for DL interoperability. However, experience has shown distributed searching systems across large numbers of DLs to be difficult to maintain in an Internet environment. The OAI‐PMH is a move away from distributed searching, focusing on the arguably simpler model of “metadata harvesting”. We detail NASA’s involvement in defining and testing the OAI‐PMH and experience to date with adapting existing NASA distributed searching DLs (such as the NASA Technical Report Server) to use the OAI‐PMH and metadata harvesting. We discuss some of the entirely new DL projects that the OAI‐PMH has made possible, such as the Technical Report Interchange Project. We explain the strategic importance of the OAI‐PMH to the mission of NASA’s Scientific and Technical Information Program.

To examine the relationship between deposit of electronic theses in institutional and archival repositories. Specifically the paper considers the automated export of theses for deposit in the archival repository in continuation of the existing arrangement in Wales for paper‐based theses.

The paper presents a description of software that makes use of the Open Archives Initiative Protocol for Metadata Harvesting (OAI‐PMH) as the first stage in the automatic import and ingest of items between institutional and archival repositories. The implications of this approach on the management of the institutional repository are also considered.

The paper shows that OAI‐PMH is a useful approach to harvesting the metadata for items to be imported into an archival repository. This reduces the difficulty of maintenance of the import and export software components albeit at the possible expense of necessitating certain requirements on the management of the institutional repository.

The research shows that institutions can make use of OAI‐PMH as a part of an automated export/import process, encouraging the preservation of multiple copies of digital items for increased safety of the content.

The software has been developed and is being tested. It is proving capable of performing the required harvesting but the relative imprecision of searching in OAI‐PMH has implications for the management of the exporting repository. These are discussed.

The paper presents a description and discussion of novel software components that enable the use of OAI‐PMH as the first stage in the export and import of digital items between repositories, independently (as far as is practicable) of the software used by the repositories themselves.

The paper aims to present the concept of the functionality of metadata harvesting for regional digital libraries, based on the OAI‐PMH protocol. This functionality is a part of regional digital libraries platform created in Poland. The platform was required to reach one of main objectives of the Polish PIONIER Programme – to enrich the content‐based services in the Polish NREN.

In order to create the regional digital libraries platform with metadata harvesting feature, digital library low‐level services provided by the dLibra Digital Library Framework in a service‐oriented architecture (SOA) are deployed. The approach for defining the set of services started with splitting the whole set of advanced digital library features into coherent functional groups, which covered functionality related to digital content, metadata, searching, etc. Then each functional group implicated the creation of a respective digital library service. Additionally, a couple of supporting services like “system” or “event services” were defined.

The exploration of metadata and information about libraries' structure enables the creation of higher‐level, content‐based services like virtual collections or metadata searching, which are described in the paper. The approach for building distributed regional digital libraries in the National Research and Education Network is suitable for larger scale systems, like international digital libraries. This issue is very important for research networking, especially in the context of European Commission's announcement promoting digital access to Europe's heritage through the European Digital Library.

The implementation of the communication protocol between different instances of digital libraries is the basis for the development of content‐based services. It presents examples of such services that are enabled through the PIONIER platform for distributed regional digital libraries, and that are provided for research and education users. The next step that will allow for the creation of even more sophisticated services, will offer the possibility to search through content gathered in PIONIER digital libraries. This will be achieved by combining the OAI‐PMH protocol together with the MPEG‐21 DIDL standard for the exchange of the digital content and content‐related metadata. Another group of complementary services also covers information services provided by grid environments.

The installation of regional digital libraries in the PIONIER network is currently providing access to more than 15,000 of digital publications. This paper presents a working implementation of the communication between digital libraries in the sense of the exploration of metadata and information about the library structure. This service is seen by us as one of the crucial mechanisms of the information infrastructure, which provides access to scientific and cultural content as well as common middleware services, which should be both distributed and platform‐independent.

The paper is providing the case study for those who are building the large‐scale distributed digital library systems. The definition of services based on metadata harvesting provides an example of core digital library services, which are transforming digital libraries into digital infrastructure for social sciences.

The purpose of this paper is to describe the Illinois LSTA grant‐funded project, “Yellow Brick Roads: Building a Digital Shortcut to Statewide Information”. The project investigated the feasibility of unified searching across library holdings, digitization projects, and online state government information through use of the Open Archives Initiative Protocol for Metadata Harvesting (OAI‐PMH) in tandem with the Z39.50 protocol through application of the Z39.50/OAI Gateway Profile.

The project proceeded through the construction of a metasearch service model based on the Z39.50/OAI Gateway Profile. Technical obstacles encountered during the construction of this demonstration service were noted, as were potential solutions. The evaluation of the Z39.50/OAI harvesting component of the Gateway Profile was conducted by means of a questionnaire of vendors providing Z39.50 servers to the Illinois Regional Library Systems.

The established technology platform provided by the University of Illinois Open Archives Initiative (OAI) Metadata Harvesting Project proved to be adequate to data sets of this size and character. However, the project concluded that the Z39.50/OAI Gateway Profile could not be deployed because of limitations in the functionality of typical Z‐servers.

The project concentrated on the technical aspects of building such a service model rather than on the usability of the interface or on questions of interoperability at the metadata level, such as to what extent the vocabularies used by the different metadata communities was compatible.

The project's findings indicate that more labor intensive, or less timely, processes of aggregating records than that envisaged by the Z39.50/OAI approach will continue to be necessary. However, further investigation of hybrid approaches hold promise.

To make CDS/ISIS databases OAI‐compliant.

One of the biggest obstacles for information dissemination to a user community is that many digital libraries or bibliographic databases use heterogeneous technologies that inhibit interoperability. The Open Archives Initiative (OAI) addresses interoperability by using a framework to facilitate the discovery of content stored in distributed archives or bibliographic databases through the use of the OAI Protocol for Metadata Harvesting (OAI‐PMH). Though the OAI‐PMH is becoming the de facto standard, many of the legacy databases or bibliographic systems, for various reasons, are not OAI‐compliant. CDS/ISIS is one such database system. In this paper, we discuss the static repository (SR) approach to make CDS/ISIS databases OAI‐compliant. The records from a CDS/ISIS database are exported onto a file and the exported records are then converted to the SR XML file format. The SR file is made OAI‐compliant either by ingesting it into the Kepler Archivelet or through the intermediation of a static repository gateway (SRG).

The SR is a simple approach for making bibliographic records contained in non‐OAI‐compliant systems, OAI‐compliant.

The SR approach is meant for records, which are relatively static. If the OAI‐compliance is achieved through the SRG, then the number of records contained in a SR file should not exceed 5,000. However, if the SR file is ingested into the Kepler Archivelet, then there is no restriction on the number of records contained in a SR file.

The authors, who jointly serve as the Open Archives Initiative (OAI) executive, reflect on the three‐year history of the OAI. Three years of technical work recently culminated in the release of a stable production version 2 of the OAI Protocol for Metadata Harvesting (OAI‐PMH). This technical product, the work that led up to it, and the process that made it possible have attracted some favor from the digital library and information community. The paper explores a number of factors in the history of the OAI that the authors believe have contributed to this positive response. The factors include focus on a defined problem statement, an operational model in which strong leadership is balanced with solicited participation, a healthy dose of community building and support, and sensible technical decisions.

In January 2002, the National Science Council of Taiwan launched a National Digital Archives Program (NDAP) and has proceeded with the implementation of a system related to the open archives initiative (OAI) framework. This paper aims to introduce the protocol and the prototype system of the project.

A general review of the project.

The OAI interoperability framework has received much attention from scholars of library and information sciences. In Europe and North America, many academic organizations and universities have undertaken theoretical studies, system design, and implementation of the OAI framework. In January 2002, the National Science Council of Taiwan launched a NDAP, and the institutional project of the National Taiwan University is one of its institutional projects. Now, the project has proceeded with the implementation of a system related to the OAI framework.

Provides information of value to information professionals.

The main purpose of this paper is to present the work recently carried out by the Food and Agriculture Organization of the United Nations (FAO) in collaboration with Associazione per la documentazione le biblioteche e gli archivi (DBA) in Italy to make web CDS/ISIS‐based applications compliant with the OAI‐PMH. CDS/ISIS is an Integrated Storage and Information Retrieval System of Unesco, which is widely used especially in Latin America and Africa. There are hundreds of CDS/ISIS‐based application systems managing bibliographical reference, ensuring high quality content through the use of built‐in authority files, data entry guidelines and validations. It also allows for metadata export in many different formats.

The methodology adopted included study, analysis and evaluation of three existing solutions for exposing metadata from the CDS/ISIS database repositories to the OAI framework.

The implementation did not include the development of automatic procedures for incremental harvesting from CDS/ISIS databases nor the normalization of the harvested data. However, a lot of experience in implementation of OAI was gained which will be useful for future development of non‐CDS/ISIS systems.

The research and development work demonstrates the importance and implications of this work for the whole CDS/ISIS community and specifically for the participating centres from the AGRIS network.

It proposes an open source, easily parametrizable plug‐in tool, which can be adapted to expose metadata from a general structure CDS/ISIS database using the OAI‐PMH protocol. This work assures that semantically rich metadata for agricultural science and research publications based on the “AGRIS Application Profile” can be handled by the OAI protocol. This in turn allows for further creation of additional services based on the exchange of knowledge on agricultural science and technology publications world‐wide.

The purpose of this article is to review metadata issues identified in recent research carried out in Scotland on services based on metadata aggregation via OAI‐PMH, and to examine the role of collection‐level description in managing ingest to harvested repositories, subsequent harvesting by secondary aggregators, and the contextualisation of institutional and aggregated repositories in the wider information retrieval environment.

The paper reviews the output of several projects involving institutional repositories and collection‐level description in Scotland.

Collection‐level description is a useful tool for aggregator services, but further work is required to accommodate information about the manipulation of metadata sets. Communities need to consider how best to incorporate structured collection information within the OAI‐PMH for their specific purposes.

The paper shows the importance of recent developments in collection description metadata for implementors of OAI‐PMH services, building on the simple placeholders for such metadata allowed by the protocol.