This service provides the conversion between two types of identifiers; the PubMed Identifier (PMID) which is a unique number assigned to PubMed citations of life science journal articles that are indexed by PubMed and the Digital Object Identifier (DOI�) which is for identifying content in the digital environment. DOI�s are used to provide current information, including where the entities (or information about them) can be found on the Internet.
Given a PMID you can use this converter to obtain the corresponding DOI, if it exists.
The tool is able to process maximum 2000 IDs in a single retrieval. If you have a larger number of IDs, split your list into smaller subsets for consecutive retrievals.
REST
To use the REST APIs, append the PMID to the url:
/rest/json/doi/18507872
To do batch querying (up to 2000 PMIDs in a batch), encode the collection of PMIDs in a json array:
/rest/json/batch/doi?pmids=[1,2,3]
This will work the other way around as well:
/rest/json/batch/pmid?dois=["10.1016/0006-2944(75)90147-7"]
SOAP
To use the SOAP APIs, take a look at the WSDL:
/soap/mappingService?wsdl
SPARQL
A sparql endpoint is available for mapping pubmed resources to the CrossRef DOI proxy. The endpoint is available at:
/sparql
An example query for mapping a PMID to a DOI:
PREFIX pubmed: <http://www.ncbi.nlm.nih.gov/pubmed/>
Another example query for doing to opposite:
PREFIX owl: <http://www.w3.org/2002/07/owl#>
SELECT ?doi WHERE { pubmed:18507872 owl:sameAs ?doi }
PREFIX owl: <http://www.w3.org/2002/07/owl#>
SELECT ?pmid WHERE { ?pmid owl:sameAs <http://dx.doi.org/10.1186/gb-2008-9-5-r89> }
