Liskov substitution principle

Liskov substitution principle - object-oriented programming principle stating that, in a computer program, if S is a subtype of T, then objects of type T may be replaced with objects of type S without altering any of the desirable properties of the program (correctness, etc.). Article "Liskov substitution principle" in English Wikipedia has 23.2 points for quality (as of July 1, 2025). The article contains 4 references and 9 sections. The article also contains quality flaw template, which reduce quality score.

This article has the best quality in Turkish Wikipedia. However, this article is the most popular in English version.

In June 2025 the article "Liskov substitution principle" was edited by 2 authors in English Wikipedia and written by 5 authors in all languages.

Since the creation of article "Liskov substitution principle", its content was written by 138 registered users of English Wikipedia and edited by 416 registered Wikipedia users in all languages.

The article is cited 50 times in English Wikipedia and cited 288 times in all languages.

The highest Authors Interest rank from 2001:

• Local (English): #12092 in September 2003
• Global: #23254 in September 2003

The highest popularity rank from 2008:

• Local (English): #39029 in April 2015
• Global: #52003 in April 2015

There are 18 language versions for this article in the WikiRank database (of the considered 55 Wikipedia language editions).

The quality and popularity assessment was based on Wikipédia dumps from July 1, 2025 (including revision history and pageviews for previous years).

The table below shows the language versions of the article with the highest quality.

#	Language	Quality grade	Quality score
1	Turkish (tr) Liskov'un yerine geçme ilkesi		29.6771
2	English (en) Liskov substitution principle		23.1789
3	Ukrainian (uk) Принцип підстановки Лісков		17.258
4	Polish (pl) Zasada podstawienia Liskov		15.3668
5	Chinese (zh) 里氏替换原则		14.5327
6	Hungarian (hu) Liskov-féle behelyettesítési alapelv		12.4967
7	Dutch (nl) Substitutieprincipe van Liskov		12.0267
8	German (de) Liskovsches Substitutionsprinzip		10.9666
9	French (fr) Principe de substitution de Liskov		10.8242
10	Korean (ko) 리스코프 치환 원칙		10.1774

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The following table shows the most popular language versions of the article.

The most popular language versions of the article "Liskov substitution principle" in all the time

#	Language	Popularity award	Relative popularity
1	English (en) Liskov substitution principle		3 177 828
2	Russian (ru) Принцип подстановки Лисков		529 829
3	German (de) Liskovsches Substitutionsprinzip		232 394
4	Polish (pl) Zasada podstawienia Liskov		148 282
5	Spanish (es) Principio de sustitución de Liskov		135 800
6	French (fr) Principe de substitution de Liskov		130 509
7	Japanese (ja) リスコフの置換原則		126 811
8	Chinese (zh) 里氏替换原则		115 937
9	Italian (it) Principio di sostituzione di Liskov		60 425
10	Portuguese (pt) Princípio da substituição de Liskov		45 507

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The following table shows the language versions of the article with the highest popularity in the last month.

The most popular language versions of the article "Liskov substitution principle" in June 2025

#	Language	Popularity award	Relative popularity
1	English (en) Liskov substitution principle		9 121
2	Russian (ru) Принцип подстановки Лисков		1 483
3	German (de) Liskovsches Substitutionsprinzip		703
4	French (fr) Principe de substitution de Liskov		529
5	Japanese (ja) リスコフの置換原則		476
6	Polish (pl) Zasada podstawienia Liskov		392
7	Chinese (zh) 里氏替换原则		363
8	Portuguese (pt) Princípio da substituição de Liskov		303
9	Spanish (es) Principio de sustitución de Liskov		214
10	Ukrainian (uk) Принцип підстановки Лісков		188

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The following table shows the language versions of the article with the highest Authors’ Interest.

Language versions of the article "Liskov substitution principle" with the highest Authors Interest (number of authors). Only registered Wikipedia users were taken into account.

#	Language	AI award	Relative AI
1	English (en) Liskov substitution principle		138
2	German (de) Liskovsches Substitutionsprinzip		48
3	French (fr) Principe de substitution de Liskov		42
4	Russian (ru) Принцип подстановки Лисков		38
5	Italian (it) Principio di sostituzione di Liskov		31
6	Japanese (ja) リスコフの置換原則		18
7	Ukrainian (uk) Принцип підстановки Лісков		17
8	Polish (pl) Zasada podstawienia Liskov		14
9	Spanish (es) Principio de sustitución de Liskov		11
10	Dutch (nl) Substitutieprincipe van Liskov		11

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The following table shows the language versions of the article with the highest Authors’ Interest in the last month.

Language versions of the article "Liskov substitution principle" with the highest AI in June 2025

#	Language	AI award	Relative AI
1	English (en) Liskov substitution principle		2
2	Turkish (tr) Liskov'un yerine geçme ilkesi		2
3	Polish (pl) Zasada podstawienia Liskov		1
4	Czech (cs) Liskovové princip zastoupení		0
5	German (de) Liskovsches Substitutionsprinzip		0
6	Spanish (es) Principio de sustitución de Liskov		0
7	Persian (fa) قاعده جانشانی لیسکوف		0
8	French (fr) Principe de substitution de Liskov		0
9	Hebrew (he) עקרון ההחלפה של ליסקוב		0
10	Hungarian (hu) Liskov-féle behelyettesítési alapelv		0

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The following table shows the language versions of the article with the highest number of citations.

Language versions of the article "Liskov substitution principle" with the highest Citation Index (CI)

#	Language	CI award	Relative CI
1	French (fr) Principe de substitution de Liskov		71
2	English (en) Liskov substitution principle		50
3	German (de) Liskovsches Substitutionsprinzip		25
4	Japanese (ja) リスコフの置換原則		24
5	Chinese (zh) 里氏替换原则		22
6	Russian (ru) Принцип подстановки Лисков		14
7	Italian (it) Principio di sostituzione di Liskov		13
8	Ukrainian (uk) Принцип підстановки Лісков		12
9	Korean (ko) 리스코프 치환 원칙		11
10	Turkish (tr) Liskov'un yerine geçme ilkesi		10

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#	Language	Value
cs	Czech Liskovové princip zastoupení
de	German Liskovsches Substitutionsprinzip
en	English Liskov substitution principle
es	Spanish Principio de sustitución de Liskov
fa	Persian قاعده جانشانی لیسکوف
fr	French Principe de substitution de Liskov
he	Hebrew עקרון ההחלפה של ליסקוב
hu	Hungarian Liskov-féle behelyettesítési alapelv
it	Italian Principio di sostituzione di Liskov
ja	Japanese リスコフの置換原則
ko	Korean 리스코프 치환 원칙
nl	Dutch Substitutieprincipe van Liskov
pl	Polish Zasada podstawienia Liskov
pt	Portuguese Princípio da substituição de Liskov
ru	Russian Принцип подстановки Лисков
tr	Turkish Liskov'un yerine geçme ilkesi
uk	Ukrainian Принцип підстановки Лісков
zh	Chinese 里氏替换原则

Best Rank

English: #39029 04.2015

Global: #52003 04.2015

Best Rank

English: #12092 09.2003

Global: #23254 09.2003

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The WikiRank project is intended for automatic relative evaluation of the articles in the various language versions of Wikipedia. At the moment the service allows to compare over 44 million Wikipedia articles in 55 languages. Quality scores of articles are based on Wikipedia dumps from July, 2025. When calculating current popularity and AI of articles data from June 2025 was taken into account. For historical values of popularity and AI WikiRank used data from 2001 to 2025... More information