Struct MetadataAccess 

#[non_exhaustive]
pub struct MetadataAccess {
    pub openalex: bool,
    pub semantic_scholar: bool,
    pub doaj: bool,
    pub datacite: bool,
    pub hal: bool,
    pub openaire: bool,
    pub core: bool,
    pub europe_pmc: bool,
}

Which Tier 2 metadata sources are enabled this session. See docs/CAPABILITY.md.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

openalex: bool

Phase 4+; enabled by DOIGET_ENABLE_OPENALEX.

semantic_scholar: bool

Phase 4+; enabled by DOIGET_ENABLE_S2.

doaj: bool

Phase 4+; enabled by DOIGET_ENABLE_DOAJ.

datacite: bool

DOI resolution for DataCite-registered DOIs (Zenodo / figshare / Dryad / OSF / most institutional repositories); enabled by DOIGET_ENABLE_DATACITE.

Unlike its siblings this is not enrichment — Crossref and Unpaywall simply do not index these DOIs, so without it a live, open record is reported ErrorCode::NotFound (ADR-0040, #414).

hal: bool

HAL — the French national OA repository, holding maths / physics / CS deposits that Crossref-centric indexes miss; enabled by DOIGET_ENABLE_HAL (ADR-0040, #418).

openaire: bool

OpenAIRE — European institutional / funder repository aggregation; enabled by DOIGET_ENABLE_OPENAIRE (ADR-0040, #416).

core: bool

CORE — cross-repository OA aggregation, the last fallback in the optional chain; enabled by DOIGET_ENABLE_CORE. An optional free key in DOIGET_CORE_API_KEY raises the rate limit but is not required (ADR-0040, #417).

europe_pmc: bool

Europe PMC — biomedical OA full text that Unpaywall does not index; enabled by DOIGET_ENABLE_EUROPE_PMC (ADR-0040, #415).

Trait Implementations

impl Clone for MetadataAccess

fn clone(&self) -> MetadataAccess

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MetadataAccess

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MetadataAccess

fn default() -> MetadataAccess

Returns the “default value” for a type.