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Overview

Most wikipedia languages will end up with articles cover very similar ground. As a result, interlanguage links tend to form 'groups' which can be propogated between wikipedia instaces. To give an example the articles en:red, fr:rouge, de:rot, ar:أحمربي and ja:赤 all link to each other. It is reasonable therefore to assume that an article which contains an interlanguage link to one of these should probably link to them all.

For want of a better description, I've decided to call the supposed missing interlanguage links induced links.

For each entry on the lists linked below, inspect the articles. If appropriate, add the suggested reciprocal interlanguage link.

Regenerating this report

Follow the general project script, then use the SQL statement below to identify links to articles that don't exist:

// Identify induced links.
// Where S -> A -> T  and S -> B -> T and not( S -> T ) and not ( T -> S ) then imply S -> T
// NB; this deliberatly does not include reciprocal links
// NB; takes a day to run when fully indexed!
SELECT sa.from_lang, sa.from_title, at.to_lang, at.to_title
FROM inter sa
INNER JOIN inter at ON at.from_lang = sa.to_lang AND at.from_title = sa.from_title AND at.to_lang != sa.from_lang
INNER JOIN inter sb ON sb.from_lang = sa.from_lang AND sb.from_title = sa.from_title AND sb.to_lang != sa.to_lang
INNER JOIN inter bt ON bt.from_lang = sb.to_lang AND bt.from_title = sb.from_title AND bt.to_lang = at.to_lang AND bt.to_title = at.to_title
LEFT OUTER JOIN inter st ON st.from_lang = sa.from_lang AND st.from_title = sa.from_title AND st.to_lang = at.to_lang
LEFT OUTER JOIN inter ts ON ts.from_lang = at.to_lang AND ts.from_title = at.to_title AND ts.to_lang = sa.from_lang AND ts.to_title = sa.from_title
WHERE st.from_title IS NULL
AND   ts.from_title IS NULL
AND   at.to_lang IN ( 'en','de','es','fr','it','nl','ja','pl','pt','sv' )
AND   sa.from_lang IN ( 'en','de','es','fr','it','nl','ja','pl','pt','sv' )

Results

The results below were generated in August 2007, from the most recently available database dump for each language.

Wikipedia content modification information:

• This page was last modified on 26 August 2007, at 19:36.

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