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scholid 0.2.1

Bug fixes

• Rejected identifiers containing invisible characters, such as soft hyphens and byte order marks, in is_scholid() and classify_scholid(). normalize_scholid(), detect_scholid_type(), and extract_scholid() now remove those characters before normalizing or matching.

• Fixed detect_scholid_type() reporting bare 8-digit PMIDs such as 29456894 as issn when their digits happened to pass the ISSN checksum. Bare compact strings are now detected as ISSN only with a hyphen (2434-561X) or an ISSN label, so a bare 2434561X is no longer detected. normalize_scholid(x, "issn") is unchanged.

Internal improvements

• Sped up classify_scholid(), detect_scholid_type(), and extract_scholid() by checking whole vectors instead of one string at a time.

Documentation

• Corrected the DOI case guidance in the definitions vignette: DOI names are case-insensitive for ASCII letters, and scholid preserves case when validating and normalizing them.

scholid 0.2.0

New identifier types

The package now supports 20 identifier types (up from 7 in 0.1.1). Each type provides structural validation, normalization from URLs and labels, and extraction from free text via the existing is_scholid(), normalize_scholid(), extract_scholid(), classify_scholid(), and detect_scholid_type() APIs.

New types in this release:

• ROR — Research Organization Registry iDs (checksum-validated)
• RRID — Research Resource Identifiers
• SWHID — Software Heritage persistent identifiers
• OpenAlex — OpenAlex entity keys (W, A, S, …)
• bibcode — SAO/NASA ADS bibliographic codes
• ISNI — International Standard Name Identifier (compact form; hyphenated ORCID-shaped strings remain orcid)
• ARK — Archival Resource Keys (ark:/NAAN/Name)
• UniProt — UniProtKB accessions
• refseq — NCBI RefSeq accessions (versioned)
• sra — INSDC Sequence Read Archive accessions (SRR, SRX, SRP, …)
• geo — NCBI GEO accessions (GSE, GSM, GPL, GDS)
• bioproject — INSDC BioProject accessions (PRJNA, PRJEB, …)
• assembly — INSDC genome assembly accessions (GCA_, GCF_, versioned)

Identifier definitions and validation rules are documented in the scholid_definitions vignette.

Internal improvements

• Introduced a central identifier registry as the single source of truth for type names, classification order, extraction patterns, and per-type metadata.
• Refactored per-type implementations to reduce duplication; exported APIs dispatch by naming convention (is_<type>, normalize_<type>, extract_<type>).
• Optimized classify_scholid() and detect_scholid_type() to avoid redundant work when resolving types.

scholid 0.1.1

Bug fixes

• Tightened normalization and validation behavior for checksum-based identifiers.
• Improved consistency between detection, normalization, and validation for ISBN, ORCID, DOI, PMCID, and arXiv identifiers.
• Fixed several edge cases in identifier parsing and canonicalization.

scholid 0.1.0

Initial release.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.