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Library of Congress Linked Data Service

Library of Congress Linked Data Service is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Library of Congress Linked Data Service rather than just read about it. In short: The LC Linked Data Service is an initiative of the Library of Congress that publishes authority data as linked data. It is commonly referred to by its URI: id.loc.gov.

Key takeaways

  • Library of Congress Linked Data Service belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Library of Congress Linked Data Service to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Library of Congress Linked Data Service from memory before moving on to harder problems.

Reference excerpt

The LC Linked Data Service is an initiative of the Library of Congress that publishes authority data as linked data. It is commonly referred to by its URI: id.loc.gov. The first offering of the LC Linked Data Service was the Library of Congress Subject Headings (LCSH) dataset, which was released in April 2009.

Datasets Library of Congress Subject Headings (LCSH) Library of Congress Name Authority File (LCNAF) Library of Congress Classification—because LC Classification uses a different MARC format than LC Authorities, mapping LC Classification to MADS/RDF was more difficult than mapping LCSH or LCNAF. Library of Congress Thesaurus for Graphic Materials Various MARC codes Various preservation vocabularies The Library of Congress offers users the opportunity to create their own datasets with library application profiles (APIs). Create your own datasets

Formats The service presents data in MADS/RDF and SKOS where appropriate, but also uses its own ontology to describe classification resources and relationships more accurately. All records are available individually via content negotiation as XHTML/RDFa, RDF/XML, N-Triples, and JSON. Each vocabulary is also available to download in its entirety. Id.loc.gov does not currently provide a SPARQL endpoint.

Uses All of LCSH are crosslinked with RAMEAU (Répertoire d’autorité-matière encyclopédique et alphabétique unifié), an authority file from the Bibliothèque nationale de France.

Technical aspects The id.loc.gov site initially used a fairly lightweight Python program to serve linked data. See also

Authority control BIBFRAME Library of Congress Control Number (LCCN) Personennamendatei (PND) Virtual International Authority File (VIAF)

References

External links

Library of Congress Linked Data Service

Worked examples

Example 1 — a first encounter with Library of Congress Linked Data Service

Start with the simplest possible case. Write down what Library of Congress Linked Data Service claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Library of Congress Linked Data Service before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Library of Congress Linked Data Service ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Library of Congress Linked Data Service

In research
Library of Congress Linked Data Service appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Library of Congress Linked Data Service in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Library of Congress Linked Data Service is common in secondary-school and first-year university syllabi. It links to neighbouring topics Knowledge bases, Library and information science stubs, Library of Congress, so understanding it makes those chapters shorter.
In everyday life
Look for Library of Congress Linked Data Service outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Library of Congress Linked Data Service in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Library of Congress Linked Data Service means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Library of Congress Linked Data Service out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Library of Congress Linked Data Service in simple terms?

The LC Linked Data Service is an initiative of the Library of Congress that publishes authority data as linked data. It is commonly referred to by its URI: id.loc.gov.

Why does Library of Congress Linked Data Service matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Library of Congress Linked Data Service?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Library of Congress Linked Data Service.

Tags

  • Knowledge bases
  • Library and information science stubs
  • Library of Congress
  • Semantic Web
  • Website stubs

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