thiemowmde updated the task description. (Show Details)

CHANGES TO TASK DESCRIPTION
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* The numbers of rows in the proposed wbl_item_references tables is going to be identical to the total number of Lexemes. There is only one lemma per Lexeme (in only one language),According https://www.mediawiki.org/wiki/Extension:WikibaseLexeme/Data_Model there is only one Item reference for the lexical category, and only one Item reference for the language. This makes the two database tables proposed hereable significantly different from wb_terms, where each Item can have labels and descriptions in 300+ languages, and users are able to enter as many aliases as they want.
* A Lexeme can have multiple lemmas, one per language code. (Note: The exact set of language codes is currently unspecified, but is most probably going to be limited to a configured set of a few hundred.) While similar, lemmas are still distinctively different from Item labels. For Item labels users are expected to enter as many as they can, while for lemmas users will only enter multiple lemmas if the Lexeme requires it. Example: The American "color" and British "colour" are supposed to be modeled as lemmas on a single Lexeme. A best-case approximation are two lemmas per Lexeme,
and users are able to enter as many aliases as they wanta worst-case approximation are ten lemmas per Lexeme.
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* In contract to Item labels, the lemma of a Lexeme is (by definition) as are (mostly, but not exclusively) single words only.
* One of the longest words in an English dictionary is "Supercalifragilisticexpialidocious" (34 characters). Some other candidates for a longest word in other languages are about 70 characters long, see http://mentalfloss.com/article/50611/longest-word-in-the-world.
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I talked to PM (@Lydia_Pintscher) and we established the limit should **not** be 255 bytes, but 768.

TASK DETAIL
https://phabricator.wikimedia.org/T187775

EMAIL PREFERENCES
https://phabricator.wikimedia.org/settings/panel/emailpreferences/

To: thiemowmde
Cc: daniel, Lucas_Werkmeister_WMDE, Ladsgroup, WMDE-leszek, thiemowmde, Aklapper, Lydia_Pintscher, Lahi, Gq86, Cinemantique, GoranSMilovanovic, QZanden, LawExplorer, Wikidata-bugs, aude, Darkdadaah, Mbch331
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