Registry Activity Streams
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Activity Streams is an open format specification for activity stream protocols, which are used to syndicate activities taken in social web applications and services, similar to those in Facebook's, Instagram's, and Twitter's. The standard provides a general way to represent activities.

Prefix
ac
Keywords
semantic web social media
Links
Homepage
Contact
Missing Contact
Pattern for Local Unique Identifiers
Missing LUI pattern
Example Local Unique Identifier
Add   Resolve
Example CURIE
ac:Add
Contributors
Ontology
In Collection
Semantic Web Context
Providers

Providers are various services that resolve CURIEs to URLs. The example CURIE ac:Add is used to demonstrate the provides available for ac. Generation of OLS and BioPortal URLs requires additional programmatic logic beyond string formatting.

Name Metaprefix URI
Activity Streams ac http://www.w3.org/ns/activitystreams#Add
Bioregistry bioregistry https://bioregistry.io/ac:Add