Installation | Interface | Supported identifier types | Inspecting capabilities | Existence checks: id_exists() | Conversion: id_convert() | Metadata retrieval: id_metadata() | Linked identifiers: id_links() | Working with mixed data | Provider selection | Scope of scholidonline

Why provider etiquette matters | Batching | Throttling

Introduction | Structural vs Registry Validity | Structural Validity | Registry Validity | Relationship to scholid

Introduction | Classification order | Supported types (overview) | DOI (Digital Object Identifier) | Structure | Prefix | Suffix | Validation in scholid | Structural Regex | ISNI (International Standard Name Identifier) | Checksum | ORCID | Components | ROR (Research Organization Registry) | RRID (Research Resource Identifier) | UniProt (UniProtKB accession) | RefSeq (NCBI Reference Sequence accession) | SRA (Sequence Read Archive accession) | GEO (Gene Expression Omnibus accession) | BioProject (INSDC BioProject accession) | Genome assembly (INSDC GCA/GCF accession) | ISBN (International Standard Book Number) | Two Forms | ISBN-10 | ISBN-13 | ISSN (International Standard Serial Number) | arXiv Identifier | Two Formats | Modern (post-2007) | Legacy (pre-2007) | ADS Bibcode | OpenAlex ID | ARK (Archival Resource Key) | SWHID (SoftWare Hash IDentifier) | PMID (PubMed Identifier) | PMCID (PubMed Central Identifier)

Installation | Interface | Supported identifier types | Detect: is_scholid() | Normalize: normalize_scholid() | Extract: extract_scholid() | Classify: classify_scholid() | Normalization + classification in messy data | Detect: detect_scholid_type() | Design notes