A GI number (for GenInfo Identifier, sometimes written in lower case, gi) is a simple series of digits that are assigned consecutively to each sequence record processed by NCBI. The GI number bears no resemblance to the Version number of the sequence record. Each time a sequence record is changed, it is assigned a new GI number.

Prefix
ncbigi
Alternative Prefixes
NCBI_gi ncbi.gi
Links
Homepage
Contact
Missing Contact
Identifier Space Owner
National Center for Biotechnology Information
Pattern for Local Unique Identifiers

Local identifiers in GenInfo Identifier should match this regular expression:
^\d+$

Example Local Unique Identifier
568815597   Resolve
Pattern for CURIES

Compact URIs (CURIEs) constructed from GenInfo Identifier should match this regular expression:
^ncbigi:\d+$

Example CURIE
ncbigi:568815597
References
Contributors
Ontology

A summary of the relations in the Bioregistry schema can be found here.

Has URI collision with (bioregistry.schema:0000016 )

This resource shares one or more URI format strings with genbank .

Therefore, when generating an extended prefix map, ncbigi, its CURIE prefix synonyms, and its URI prefix synonyms are merged into the record for genbank . If you believe that these are two distinct semantic spaces and should not be merged, please open a new issue on the Bioregistry issue tracker for discussion.

Metaregistry GenInfo Identifier

The metaregistry provides mappings between the Bioregistry and other registries. There are 4 mappings to external registries for this resource with 4 unique external prefixes.

Registry Name Registry Metaprefix External Prefix Curate
BioContext biocontext NCBIGI
EDAM EDAM Ontology logo edam 2314
GO Gene Ontology Registry logo go NCBI_gi
NCBI National Center for Biotechnology Information Registry logo ncbi GI
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 568815597 is used to demonstrate the providers available for GenInfo Identifier. A guide for curating additional providers can be found here.

Name Metaprefix URI
GenInfo Identifier ncbigi http://www.ncbi.nlm.nih.gov/entrez/viewer.fcgi?val=568815597
Bioregistry bioregistry https://bioregistry.io/ncbigi:568815597