Unsub documentation
  • Welcome!
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    • Getting Title Prices
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    • Cost per use (CPU)
    • Data export
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    • ROR: Research Organization Registry
    • Single Journal View
    • External data
  • How it works
    • How do we calculate your OA Publish spend?
    • How do we calculate ILL requests and ILL cost?
    • How do we calculate title-by-title subscription costs?
    • Where do we get Year of Publication data for PTA and open access calculations?
    • Does Unsub account for Sci-Hub usage?
    • Where do the APC prices come from?
    • Testimonials
  • Troubleshooting
    • Why don't I see a certain title in my dashboard?
    • Why is my journal title-by-title price not what I set it to be?
    • What’s the right amount of titles to subscribe to?
    • Where does the citation and authorship data come from?
    • How do you calculate the open access portion of the forecast?
    • Does this work for consortia?
    • Why does the forecast data change?
    • What does the "Missing PTA" warning mean?
    • What does the "Missing Prices" warning mean?
    • What does the "Journal Whitelist" alert mean?
    • How do I switch between University accounts?
    • What publishers are supported?
    • About Unsub
      • Does Unsub have an accessibility statement?
      • How is Unsub different from Consortium Manager?
      • Unsub and Open Source
      • Will Unsub be bought or acquired?
  • Learning Resources
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On this page
  • Citations
  • Authorships
  • Journal metadata
  • Journal embargo periods
  • Publisher societies
  • Number of papers
  • ROR and Grid identifiers
  • APC prices
  • Unpaywall
  • Unpaywall Browser Extension
  1. Reference

External data

Details about external data used in Unsub

PreviousSingle Journal ViewNextHow it works

Last updated 2 years ago

The following is a list of the external data sources used, including what they are used for, and how often the data is updated.

Citations

Data source:

Update frequency: Quarterly (4x per year)

Used in Unsub: Journal level calculation (if you include citations in your ). Citations data shown in or in the table view in a scenario. Institutional level .

Authorships

Data source:

Update frequency: Quarterly (4x per year)

Used in Unsub: Journal level calculation (if you include authorships in your ). Authorships data shown in or in the table view in a scenario. Institutional level .

Journal metadata

This includes journal title, ISSNs, publisher, open access status, and whether title is currently publishing (based on date of last DOI published).

Data source:

Update frequency: Daily

Used in Unsub: Determine whether a journal should be included in Unsub dashboards or not (see ), and as the source of truth to link together journals, user uploaded data, and any external journal level data.

Journal embargo periods

Update frequency: Not currently updated

Publisher societies

Data source: Manually collected.

Update frequency: Not currently updated

Number of papers

Update frequency: Daily

Used in Unsub: Journal level usage forecast.

ROR and Grid identifiers

Data source: Microsoft Academic Graph

Update frequency: Not currently updated; we'll switch to OpenAlex in the near future.

Used in Unsub: Used to link together many kinds of data (journals, authors, etc.) to institutions.

APC prices

Update frequency: Not updated

Unpaywall

Update frequency: Every 6 hours (4x/day)

Used in Unsub: Used to determine usage patterns at a journal title level. Also used in creating citation and authorship data (see above for how citation and authorship data are used).

Unpaywall Browser Extension

Update frequency: Updated October 2022. Likely update frequency: annual

Used in Unsub: Used to determine usage patterns at a journal title level.

Data source: Manually collected. We will soon switch over to using data from

Used in Unsub: Shown in in Unsub dashboards, and used in calculating

Used in Unsub: Shown in in Unsub dashboards

Data source:

Data source: .

Used in Unsub: For the institutional for the big five publishers (Elsevier, Wiley, Springer Nature, Taylor & Francis, SAGE) only.

Data source:

Data source: Browser Extension data; aggregated statistics about journal-level year of publication usage derived from usage of people with the Unpaywall browser extension installed

oa.works
single journal view
Cost Per Use
single journal view
OpenAlex
We get these from publisher websites
APC Report
Unpaywall
Unpaywall
OpenAlex
Cost Per Use
single journal view
APC Report
OpenAlex
Cost Per Use
single journal view
APC Report
OpenAlex
Why don't I see a certain title in my dashboard?
scenario parameters
scenario parameters