EVOLUTION OF AUSTRALIAN OPEN ACCESS LEVELS

CATEGORIES OVER TIME

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FURTHER INFORMATION

PARAMETERS

The graph shows percentages of open access over time for major categories of access. "Hybrid" is that proportion of publisher access which is not through a fully OA journal, using the Directory of Open Access Journals (DOAJ) to define the set of journals that are purely open access. Outputs that are accessible through venues that are not in DOAJ are categorised as "hybrid" where Unpaywall detects a license and "bronze" where Unpaywall does not detect a license. "Gold" is the proportion of outputs that are available via a publisher site, with a detectable reuse license (i.e. inclusing hybrid). "Green" OA is the proportion of all outputs for which a copy is available via a repository.

Overall open access is the proportion of all outputs where an accessible copy can be found. Outputs can therefore be both available by both green and gold routes and the sum of these types will not provide the overall percentage of open access. Publication year is derived from Crossref metadata, which generally corresponds to a publisher provided date for first online availability.

DATA SOURCES

Data is obtained from Crossref metadata (basic bibliographic information), Unpaywall (open access status), Microsoft Academic (affiliations of outputs), and GRID (characteristics of affiliated institutions such as location and country. Analysis is limited to outputs that have a Crossref DOI as this is this is the subset for which Unpaywall provides information.

FURTHER INFORMATION

The Curtin Open Knowledge Initiative is a strategic initiative of the Research Office at Curtin, Faculty of Humanities, School of Media, Creative Arts and Social Enquiry and the Curtin Institute for Computation.

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