S-expression

data serialization format often used for Lisp
Place data_serialization_format Q1113529
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S-expression

Summary

S-expression is a data serialization format[1]. S-expression draws 2,958 Wikipedia views per month (data_serialization_format category, ranking #2 of 14).[2]

Key Facts

  • S-expression is credited with the discovery of John McCarthy[3].
  • S-expression's instance of is recorded as data serialization format[4].
  • S-expression's instance of is recorded as syntax[5].
  • S-expression's developer is recorded as John McCarthy[6].
  • S-expression's developer is recorded as Ron Rivest[7].
  • S-expression's described at URL is recorded as http://people.csail.mit.edu/rivest/Sexp.txt[8].
  • S-expression's Stack Exchange tag is recorded as https://stackoverflow.com/tags/s-expression[9].
  • S-expression's manifestation of is recorded as semi-structured data[10].
  • S-expression's uses is recorded as round brackets[11].

Body

Designation and Status

Recorded instance of include data serialization format[4] and syntax[5].

Why It Matters

S-expression draws 2,958 Wikipedia views per month (data_serialization_format category, ranking #2 of 14).[2] S-expression has Wikipedia articles in 12 language editions, a strong signal of global cultural recognition.[12] S-expression is known by 15 alternative names across languages and contexts.[13]

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). S-expression. Retrieved October 2, 2026, from https://4ort.xyz/entity/s-expression
MLA “S-expression.” 4ort.xyz Knowledge Graph, 4ort.xyz, 2 Oct. 2026, https://4ort.xyz/entity/s-expression.
BibTeX @misc{4ortxyz_s-expression_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{S-expression}}, year = {2026}, url = {https://4ort.xyz/entity/s-expression}, note = {Accessed: 2026-10-02}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): S-expression — https://4ort.xyz/entity/s-expression (retrieved 2026-10-02)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 25d ago · VGMaintenanceBot bot · 2026-09-08 view diff on Wikidata ↗
    Instance of → —
    Discoverer or inventor → John McCarthy
    Manifestation of → semi-structured data
    Uses → round brackets
    + 5 other properties edited (see Wikidata diff for full list)
    "/* wbsetqualifier-add:1| */ [[Property:P9675]]: 13167, Add qualifier to Rosetta Code page ID `S-Expressions`"
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