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Overview
OAI-PMH(OAI-Protocol for Metadata Harvesting) provides an efficient exchange of Metadata in its own standardized OAI format so called OAI protocol. The data are provided by the internal databases (data providers). The collected records are then processed by service providers and provided for search queries. The OAI harvester is working with simple HTTP GET requests and HTTP POST. The HTTP response provides the record data from the data providers in various formats.
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In addition to a „free text” search query it is possible to query some search field individually as shown below:
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documentType, issued, isbn, issn, ppn, licenseModel, author, mainTitle, Abstract, Dclassification.
Some search fields have specific values which can be used to receive different documents types. Those are explained in the following sections.
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DdocumentType
Example queries: DdocumentType:A