public enum ACTION
{
MODIFY_AUTHOR,
MODIFY_EDITOR,
MODIFY_COORDINATOR,
MODIFY_ADMIN,
MODIFY_READER,
CREATE_BOOK,
MODIFY_BOOK,
CREATE_ARTICLE,
MODIFY_ARTICLE,
APPROVE_ARTICLE,
PUBLISH_ARTICLE,
REDIRECT_ARTICLE,
VIEW_FULL_TEXT,
}

public enum ROLE
{
AUTHOR = 1,
EDITOR = 4,
COORDINATOR = 16,
READER = 256,
ADMIN = 1024,
}

Pubmed

https://www.ncbi.nlm.nih.gov/pmc/tools/get-metadata/

https://www.ncbi.nlm.nih.gov/pmc/tools/developers/#use-cases

Get article metadata

This E-Summary call retrieves article metadata for a PMCID:

https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esummary.fcgi?db=pmc&id=3539452&retmode=json

The returned data includes the PubMed ID (PMID) for this article, so you can do a further call to get PubMed metadata for the same article:

https://eutils.ncbi.nlm.nih.gov/entrez/eutils/esummary.fcgi?db=pubmed&id=22368089&retmode=json

full content of articles...

https://sci-hub.scihubtw.tw/