The table below describes the process for collecting data, update frequency and any additional details across all of Altmetric's tracked sources.

 

Source name

Collection method

Update frequency

Notes

Twitter                                          

Third party data provider API

Real-time feed

Demographics, support for retweets, with monitoring of suspicious activity.

Facebook

Facebook API

Daily

Posts on public Facebook Pages only, with prioritised popular Pages.

Policy documents

PDFs collected and scanned from policy sources and repositories

Varies by policy source (min monthly updates)

PDFs of policy documents are scanned for links to supported domains, as well as textual references to research which are resolved to identifiers where possible.

News

RSS feeds and API

Real-time feed

Manually curated news sources, with data provided via a third-party provider as well as RSS feeds. References are extracted via text-mining and links.

Blogs

RSS feeds

Daily

Manually curated list, harvesting links to scholarly content.

Mendeley

Mendeley API

Daily

Reader counts is number of readers with the output in their Library. Not included in score.

Post-publication peer reviews

Publons API

Daily

Peer review comments collected from item records and associated by unique identifier.

Reddit

Reddit API

Daily

Includes all sub-reddits. Original posts only, no comments.

Wikipedia

Wikipedia API

Real-time feed

Mentions of scholarly outputs collected from References section in Article pages. English, Swedish, and Finnish Wikipedia only.

Q&A (Stack Overflow)

Stack Overflow API

Daily

Scan for links to scholarly outputs.

F1000Prime recommendations

F1000 API

Daily

Scan for links to scholarly outputs.

YouTube

YouTube API

Daily

Scan for links to scholarly outputs in video descriptions.

Open Syllabus

Static import from Open Syllabus

Last update September 2016

Link syllabi's contents to HLOM IDs.

Web of Science Citations    

Clarivate Analytics API        

Real-time feed

Citation counts from peer-reviewed literature. Not included in score. Appear in the Explorer for customers with existing Web of Science subscriptions.

Dimensions Citations

Dimensions API

Daily

Match outputs based on scholarly IDs. 

Patent Citations

Static import from Dimensions

Last update May 2020

Scanning JSON patent records for links to publications and DOIs.