Preprints are articles which have not been peer-reviewed from various preprint servers and open research platforms such as bioRxiv, ChemRxiv, PeerJ Preprints and F1000.

Prefix
ppr
Keywords
bibliometrics preprints publishing
Links
Homepage
References
GitHub PR https://github.com/bridgedb/tiwid/pull/21
Identifier Standards
Pattern for Local Unique Identifiers

Local identifiers in Europe PMC Preprints should match this regular expression:
^PPR\d+$

Example Local Unique Identifier
PPR103739   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from Europe PMC Preprints should match this regular expression:
^ppr:PPR\d+$

Example CURIE
ppr:PPR103739
Providers

A provider turns a local unique identifiers from a resource into a URI. Many providers are also resolvable as URLs (i.e., they can be used in a web browser).

The local unique identifier PPR103739 is used to demonstrate the providers available for Europe PMC Preprints. Some providers may use a different example, which is displayed in the table below. A guide for curating additional providers can be found here.

Name Metaprefix URI
Europe PMC Preprints ppr https://europepmc.org/article/ppr/PPR103739
Bioregistry bioregistry https://bioregistry.io/ppr:PPR103739