Libpng License
type: Thing
additional property: PropertyValue
  property ID: P31
  value: permissive free software license
additional property: PropertyValue
  property ID: P144
  value: zlib License
additional property: PropertyValue
  property ID: P790
  value: Free Software Foundation
additional property: PropertyValue
  property ID: P790
  value: Debian Free Software Guidelines
additional property: PropertyValue
  property ID: P790
  value: Open Source Initiative
additional property: PropertyValue
  property ID: P953
  value: http://www.libpng.org/pub/png/src/libpng-LICENSE.txt
additional property: PropertyValue
  property ID: P1813
  value: Libpng
additional property: PropertyValue
  property ID: P2479
  value: Libpng
additional property: PropertyValue
  property ID: P2671
  value: /g/11bc6wwn6w
confidence:
  popularity graph score:
    score: 0.0
    score pct: 0
    tier: long_tail
    components:
      sitelinks: 0
      sitelinks norm: 0.0
      unique citations: 1
      unique citations norm: 0.0
      monthly pageviews: 6
      monthly pageviews norm: 0.0
  sitelinks: 0
  unique citations: 1
  monthly pageviews: 6
  yearly pageviews: 11
  pageview trend:
    m: 2026-08
    v: 6
  pageview trend:
    m: 2026-07
    v: 2
  pageview trend:
    m: 2026-06
    v: 1
  pageview trend:
    m: 2026-05
    v: 1
  pageview trend:
    m: 2026-05
    v: 1
  tier: long_tail
claims:
  P31:
    value: Q1437937
    source count: 0
    confidence: 0.0
    value label: permissive free software license
  P144:
    value: Q207243
    source count: 1
    confidence: 0.2
    value label: zlib License
  P790:
    value: Q48413
    source count: 0
    confidence: 0.0
    value label: Free Software Foundation
  P790:
    value: Q903054
    source count: 0
    confidence: 0.0
    value label: Debian Free Software Guidelines
  P790:
    value: Q845918
    source count: 0
    confidence: 0.0
    value label: Open Source Initiative
  P953:
    value: http://www.libpng.org/pub/png/src/libpng-LICENSE.txt
    source count: 0
    confidence: 0.0
  P1813:
    value: Libpng
    source count: 1
    confidence: 0.2
  P2479:
    value: Libpng
    source count: 0
    confidence: 0.0
  P2671:
    value: /g/11bc6wwn6w
    source count: 0
    confidence: 0.0
citations:
  source: SPDX License List
  stated in qid: Q56423180
  retrieved: 2022-09-18
meta:
  wikidata id: Q6542418
  domain: permissive_free_software_license
  level: standard
  html url: https://4ort.xyz/entity/libpng-license
  markdown url: https://4ort.xyz/entity/libpng-license.md
  facts url summary: https://4ort.xyz/entity/libpng-license/facts.json
  facts url standard: https://4ort.xyz/entity/libpng-license/facts.json
  facts url full: https://4ort.xyz/entity/libpng-license/facts.json
  data source: Wikidata (CC0 / public domain)
  license: https://creativecommons.org/publicdomain/zero/1.0/
  api version: v1
  served at: 2026-08-23T20:29:03.674171Z
  entity updated at: 2026-05-03T23:45:09.469384+00:00Z
  entity created at: 2026-05-03T14:36:45.680853+00:00Z