Most content in Publicly Available Content Database was already included in ProQuest Central and other ProQuest databases. Open access journals in ProQuest databases have been identified primarily based on inclusion in DOAJ (Directory of Open Access Journals) or ROAD. Content from publishers or sources known to be fully publicly available is also included (for example, all titles in ProQuest databases from fully open access publishers such as Hindawi are included, although not every title has yet been listed in DOAJ).
Non-journal content including dissertations, working papers/preprints and conference proceedings are included. However, non-scholarly source types, such as government documents and news, are not included.
In addition, records from preprint repositories such as arXiv have been added to Publicly Available Content Database, with links out to the full text; these records are not in any other ProQuest databases.
Subject coverage includes:
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