Z39.50

application layer communications protocol for searching and retrieving information from a database over a TCP/IP computer network
CreativeWork computer_network_protocol Q135847
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Z39.50

Summary

Z39.50 is a computer network protocol[1]. Z39.50 draws 237 Wikipedia views per month (computer_network_protocol category, ranking #97 of 317).[2]

Key Facts

  • Z39.50's instance of is recorded as computer network protocol[3].
  • Z39.50's instance of is recorded as NISO standard[4].
  • Z39.50's developer is recorded as National Information Standards Organization[5].
  • Z39.50 is used for virtual union catalog[6].
  • November 27, 2002 marks the founding of Z39.50[7].
  • Z39.50's described at URL is recorded as https://www.loc.gov/z3950/agency/markup/markup.html[8].
  • Z39.50's described by source is recorded as Z39.50[9].
  • Z39.50's described by source is recorded as ISO 23950[10].
  • Z39.50's port is recorded as {'amount': '+210'}[11].
  • Z39.50's port is recorded as {'amount': '+210'}[12].
  • Z39.50's main Wikidata property is recorded as P1161[13].

Why It Matters

Z39.50 draws 237 Wikipedia views per month (computer_network_protocol category, ranking #97 of 317).[2] Z39.50 has Wikipedia articles in 17 language editions, a strong signal of global cultural recognition.[14] Z39.50 is known by 8 alternative names across languages and contexts.[15]

References

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

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . Library of Congress Subject Headings. Retrieved . wikidata.org.
  3. [5] . Library of Congress Subject Headings. Retrieved . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . Library of Congress Subject Headings. Retrieved . wikidata.org.
  6. [8] . wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.

Class ancestry

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

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [14] . Wikidata sitelinks. wikidata.org.
  3. [15] . 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). Z39.50. Retrieved May 3, 2026, from https://4ort.xyz/entity/z39-50
MLA “Z39.50.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/z39-50.
BibTeX @misc{4ortxyz_z39-50_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Z39.50}}, year = {2026}, url = {https://4ort.xyz/entity/z39-50}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Z39.50 — https://4ort.xyz/entity/z39-50 (retrieved 2026-05-03)

Canonical URL: https://4ort.xyz/entity/z39-50 · Last refreshed:

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. 5d ago · Twofivesixbot bot · 2026-05-17 view diff on Wikidata ↗
    Developer
    Instance of computer network protocol, NISO standard
    Aliases
    Inception +2002-11-27T00:00:00Z
    + 7 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-update-qualifiers:1||1|6 */ [[Property:P2347]]: 29286, mv to monolingual text names on YSO statements"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.