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
LLM-contributed programs
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"
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