Resolution, Conversion, Linking and Metadata for Scholarly Identifiers.

scholidonline

scholidonline provides lightweight online utilities for working with scholarly identifiers in R. It builds on scholid for identifier detection and normalization, and adds minimal-dependency functions to query external registries.

See the full documentation at the scholidonline website.

Installation

Install the released version from CRAN:

install.packages("scholidonline")

Scope

The package focuses on online operations for common identifier systems used in scholarly communication:

• DOI
• ORCID iD
• arXiv
• PubMed (PMID)
• PubMed Central (PMCID)

It provides registry-backed functionality such as:

• Existence checks
• Identifier conversion across systems
• Basic metadata retrieval
• Discovery of linked identifiers

Interface

User-available functions:

Examples

# List supported scholidonline identifier types
scholidonline::scholidonline_types()

## [1] "arxiv" "doi"   "orcid" "pmcid" "pmid"

# List scholidonline capabilities
scholidonline::scholidonline_capabilities()

##     type operation target               providers default_provider
## 1  arxiv    exists   <NA>             auto, arxiv            arxiv
## 2  arxiv     links   <NA>             auto, arxiv            arxiv
## 3  arxiv      meta   <NA>             auto, arxiv            arxiv
## 4    doi    exists   <NA> auto, doi.org, crossref          doi.org
## 5    doi     links   <NA>          auto, crossref         crossref
## 6    doi      meta   <NA> auto, crossref, doi.org         crossref
## 7    doi   convert   pmid        auto, ncbi, epmc             ncbi
## 8    doi   convert  pmcid        auto, ncbi, epmc             ncbi
## 9  orcid    exists   <NA>             auto, orcid            orcid
## 10 orcid     links   <NA>             auto, orcid            orcid
## 11 orcid      meta   <NA>             auto, orcid            orcid
## 12 pmcid    exists   <NA>        auto, ncbi, epmc             ncbi
## 13 pmcid     links   <NA>        auto, ncbi, epmc             ncbi
## 14 pmcid      meta   <NA>        auto, ncbi, epmc             ncbi
## 15 pmcid   convert   pmid        auto, ncbi, epmc             ncbi
## 16 pmcid   convert    doi        auto, ncbi, epmc             ncbi
## 17  pmid    exists   <NA>        auto, ncbi, epmc             ncbi
## 18  pmid     links   <NA>        auto, ncbi, epmc             ncbi
## 19  pmid      meta   <NA>        auto, ncbi, epmc             ncbi
## 20  pmid   convert    doi        auto, ncbi, epmc             ncbi
## 21  pmid   convert  pmcid        auto, ncbi, epmc             ncbi

# Check if an ID exists online
scholidonline::id_exists(
  "10.1000/182",
  type = "doi"
  )

## [1] TRUE

# Convert identifiers across systems
scholidonline::id_convert(
  "12345678",
  to = "doi",
  from = "pmid"
  )

## [1] "10.1234/2013/999990"

# Retrieve scholarly metadata
out <- scholidonline::id_metadata(
  "10.1038/nature12373",
  type = "doi"
  )

# Show key fields
knitr::kable(out)

# Return identifiers linked to the same scholarly record
out <- scholidonline::id_links(
  "31452104",
  provider = "epmc"
  )

knitr::kable(out)

Relationship to scholid

scholid provides dependency-free utilities for detecting, normalizing, classifying, and extracting scholarly identifiers.

scholidonline builds on that foundation and adds online registry queries.

License

MIT.