Precision for the style of the Journal Francais d'Ophtalmologie (JFO)
The following XML descriptor in the JFO style lacks and so this journal is not correctly sorted/classed as a Medecine Journal :
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category field="medicine"
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category field="medicine"
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If we added the would we need to add the category to all 2000 of their journals?!
(in general, if you're looking for a CSL style for a specific journal, I would not use the field-filter at all, since field assignments aren't curated very carefully)
Anyway, If end-users can find the good csl by other method, no problem.