A representation of the periodic table of the elements in OWL, with both elements and a hierarchical classification. This is from the DARPA Agent Markup Language (DAML) project, which has been inactive since the mid 2000's.

Prefix
daml.pt
Keywords
ontology
Links
Homepage OWL Request Discussion
Contact
Missing Contact
Pattern for Local Unique Identifiers
Missing LUI pattern
Example Local Unique Identifiers
Be   Resolve
Metallic   Resolve
Non-metallic   Resolve
Example CURIEs
daml.pt:Be
daml.pt:Metallic
daml.pt:Non-metallic
Contributors
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 Be is used to demonstrate the providers available for DAML Periodic Table of the Elements. 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
DAML Periodic Table of the Elements daml.pt http://www.daml.org/2003/01/periodictable/PeriodicTable#Be
Bioregistry bioregistry https://bioregistry.io/daml.pt:Be