S-expression

data serialization format often used for Lisp
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S-expression

Summary

S-expression is a data serialization format[1]. S-expression draws 310 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 Freebase ID is recorded as /m/0f70c[8].
  • S-expression's described at URL is recorded as http://people.csail.mit.edu/rivest/Sexp.txt[9].
  • S-expression's Stack Exchange tag is recorded as https://stackoverflow.com/tags/s-expression[10].
  • S-expression's manifestation of is recorded as semi-structured data[11].
  • S-expression's uses is recorded as round brackets[12].
  • S-expression's Rosetta Code page ID is recorded as S-Expressions[13].
  • S-expression's Microsoft Academic ID is recorded as 121248811[14].

Body

Designation and Status

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

Why It Matters

S-expression draws 310 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.[15] S-expression is known by 5 alternative names across languages and contexts.[16]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [4] . wikidata.org.
  2. [5] . wikidata.org.
  3. [3] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . Freebase Data Dumps. wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.
  12. [14] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [15] . Wikidata sitelinks. wikidata.org.
  3. [16] . Wikidata aliases. wikidata.org.

📑 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 May 3, 2026, from https://4ort.xyz/entity/s-expression
MLA “S-expression.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 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: 2026-05-03}}
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 2026-05-03)

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