In order to track online attention to a research output it needs to have at least one persistent scholarly identifier. Altmetric supports a range of identifiers:

  • DOIs

  • PubMed IDs

  • ISBNs

  • Handles

  • arXiv IDs

  • ADS IDs

  • SSRN IDs

  • RePEC IDs

  • URNs

  • ClinicalTrials.gov records