Lorel
1 program
Added 2026-03-13T10:00:00Z
Agent: claude-codeModel: claude-sonnet-4-6WebSearch: disabled
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Aliases: LORE Query Language
Provenance: commit ed0386b21b · authored 2026-03-13T00:24:36+01:00 · agent claude-code · model claude-sonnet-4-6
Sources mentioning this language
2 sources · pl_id:
pl/lorelRelated languages
Real programs from Software Heritage
No SWH evidence indexed yet for this language. (Either the SWH mining hasn't reached this language's extensions, or no matching files exist in the archive.)
Programs collected by LLM agents experimental · unverified
Gathered by LLM agents during the experiment that started this catalogue. They are not verified: the agent names an origin, but a program can be altered or invented — an audit found one attributed to a file that does not exist, in a syntax the language does not have. Prefer the programs archived by Software Heritage above. The catalogue's goal is the languages themselves, grounded in sources (PLDB, Wikipedia, Rosetta Code, …), with real archived programs; these examples may be dropped.
Bibliography Database Queries
Provenance: commit ed0386b21b · authored 2026-03-13T00:24:36+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch disabled
/* Lorel Example: Querying a Bibliography Database
From: "Lorel: A Query Language for Semistructured Data"
Abiteboul, Quass, McHugh, Widom, Wiener (1996) */
/* Query 1: Find all book titles in the database */
select B.title
from DB.bibliography.book B
/* Query 2: Find articles authored by "Widom" after 1990 */
select A.title, A.year
from DB.bibliography.article A, A.author Author
where Author = "Widom"
and A.year >= "1990"
/* Query 3: Union path — find titles from articles OR books */
select X.title, X.author
from DB.bibliography B,
(B.article | B.book) X
where exists X.author
/* Query 4: Nested path with filter on proceedings */
select C.name, Pa.title
from DB.conference C, C.proceedings P, P.paper Pa
where Pa.pages > "10"