The Dewey Decimal Classification (DDC) system, devised by library pioneer Melvil Dewey in the 1870s and owned by OCLC since 1988, provides a dynamic structure for the organization of library collections. Now in its 23rd edition, and available in print and Web versions, the DDC is the world's most widely used library classification system.

Prefix

ddc

Links

Homepage

Pattern for Local Unique Identifiers

Local identifiers in Dewey Decimal Classification should match this regular expression:
^(([0-9][0-9]?|[0-9]{3}(-[0-9]{3})?|[0-9]{3}(-[0-9]{3}(:[0-9]+)?)?|[0-9]{3}\.[0-9]+(-[0-9]{3}\.[0-9]+(:[0-9]+)?)?|T[1-9][A-Z]?--[0-9]+(-T[1-9][A-Z]?--[0-9]+(:[0-9]+)?)?|[1-9][A-Z]?--[0-9]+(-[1-9][A-Z]?--[0-9]+(:[0-9]+)?)?)?)$

Example Local Unique Identifiers

325.4   Resolve
3   Resolve
32   Resolve
325   Resolve
325.4-325.9   Resolve

Pattern for CURIES

Compact URIs (CURIEs) constructed from Dewey Decimal Classification should match this regular expression:
^ddc:(([0-9][0-9]?|[0-9]{3}(-[0-9]{3})?|[0-9]{3}(-[0-9]{3}(:[0-9]+)?)?|[0-9]{3}\.[0-9]+(-[0-9]{3}\.[0-9]+(:[0-9]+)?)?|T[1-9][A-Z]?--[0-9]+(-T[1-9][A-Z]?--[0-9]+(:[0-9]+)?)?|[1-9][A-Z]?--[0-9]+(-[1-9][A-Z]?--[0-9]+(:[0-9]+)?)?)?)$

Example CURIEs

ddc:325.4
ddc:3
ddc:32
ddc:325
ddc:325.4-325.9

Contact

Missing Contact

Contributors

submitter Charles Tapley Hoyt   0000-0003-4423-4370   cthoyt

The metaregistry provides mappings between the Bioregistry and other registries. There are 2 mappings to external registries for this resource with 2 unique external prefixes.

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 325.4 is used to demonstrate the providers available for Dewey Decimal Classification. Some providers may use a different example, which is displayed in the table below. A guide for curating additional providers can be found here.