The collection of systems, indexes, interfaces, protocols, and metadata practices that enable users to search for, locate, and access library resources across multiple local and external systems (catalogues, institutional repositories, licensed databases, link resolvers, and APIs), presenting relevance, availability, and access pathways.

Principle

Discovery translates user queries into searches across heterogeneous metadata and access points so that findability and route‑to‑access (direct link, full text, request, ILL) are visible; design choices (indexing scope, relevance ranking, metadata quality) materially shape what users perceive as the collection.

Demonstration

Illustrative scenario: Situation — a student seeks articles on a topic spanning books and subscription journals. Recognition — they enter a query in the discovery interface that aggregates the local catalogue and licensed databases. Action — the system returns ranked results showing availability, links to full text where licensed, and request buttons where access is restricted. Consequence — the student locates and accesses relevant materials more efficiently, or is informed how to request items not immediately available.

Misapplication

Assuming a single discovery search covers all holdings; the semantic error is treating a discovery interface as comprehensive without recognising indexed exclusions (publisher embargoes, unindexed special collections, or subscription gaps), which can mislead users about availability.

Consequence

Effective discovery increases user success and reduces redundant requests, while poor discovery (incomplete indexing, opaque access cues) leads to missed resources, unnecessary ILLs, or frustrated users; discovery design also affects equity of access and metadata maintenance workloads.

Reversal

In contexts where detailed archival description or curated finding aids are required, a general discovery layer may obscure nuanced provenance or context; privacy, embargoes, or legal restrictions may deliberately suppress discoverability for some records.

Boundary

Clearly within — an integrated discovery layer that aggregates catalogue, repository and licensed index metadata and surfaces access links. Boundary case — a subject database indexed in discovery but with partial coverage due to licensing. Clearly outside — general web search engines (which discover resources broadly but are not under library control) or internal staff directories not intended for public discovery.

Semantic Tension

Findability/Relevance ↔ Privacy/Restriction (maximising discoverability vs protecting sensitive records or complying with embargo/licence conditions); discovery configuration must balance openness with legal and ethical limits.

Synthesis

Resource discovery is the user‑facing translator between intents and holdings: its indexing scope, metadata fidelity, and interface choices determine what the collection appears to contain and how easily users can exercise access rights.