The Open Archives Initiative Protocol for Metadata Harvesting (referred to as the OAI-PMH in the remainder of this document) provides an application-independent interoperability framework based on metadata harvesting for indexing databases. This journal system has OAI 2.0 version for harvesting data.

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Examples of OAI-PMH Requests for Sigma Journal of Engineering and Natural Sciences

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1. To retrieve information about a repository.
https://eds.yildiz.edu.tr/sigma/ajaxtool/oai?verb=identify

2. To retrieve the set structure of Sigma Journal of Engineering and Natural Sciences repository.
https://eds.yildiz.edu.tr/sigma/ajaxtool/oai?verb=listsets

3. To retrieve the metadata formats available from Sigma Journal of Engineering and Natural Sciences repository.
https://eds.yildiz.edu.tr/sigma/ajaxtool/oai?verb=listmetadataformats

4. To harvest records from a Sigma Journal of Engineering and Natural Sciences repository.
https://eds.yildiz.edu.tr/sigma/ajaxtool/oai?verb=listrecords&metadataprefix=oai_dc

5. To retrieve an individual metadata record from a Sigma Journal of Engineering and Natural Sciences repository
https://eds.yildiz.edu.tr/sigma/ajaxtool/oai?verb=getrecord&identifier=oai:sigma:article/2006&metadataprefix=oai_dc

6. To retrieve an abbreviated form of List Records, retrieving only headers rather than records for specific volume in journal
https://eds.yildiz.edu.tr/sigma/ajaxtool/oai?verb=listrecords&metadataprefix=oai_dc&set=1