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
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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]+(-[0-9]{3}\.[0-9]+)?|[1-9][A-Z]?--[0-9]+|[1-9][A-Z]?--[0-9]+(-[1-9][A-Z]?--[0-9]+)?(:[0-9]+)?$

Example Local Unique Identifiers
325.4
325.4-325.9
325
32
3
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]+(-[0-9]{3}\.[0-9]+)?|[1-9][A-Z]?--[0-9]+|[1-9][A-Z]?--[0-9]+(-[1-9][A-Z]?--[0-9]+)?(:[0-9]+)?$

Example CURIEs
ddc:325.4
ddc:325.4-325.9
ddc:325
ddc:32
ddc:3
Contributors
Metaregistry Dewey Decimal Classification

The metaregistry provides mappings between the Bioregistry and other registries. There are 1 mappings to external registries for this resource with 1 unique external prefixes.

Registry Name Registry Metaprefix External Prefix Curate
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