Template documentationThis template produces no output. It processes a citation, which loads Module:Citation/CS1/Configuration, which loads c:Data:CS1/Identifier limits.tab, which is an expensive parser function call. This only has to be done once per article, but since references render at the end of the article usually it will occasionally happen after all of the expensive parser function calls have been used, resulting in every reference giving a Lua error. By loading it early, this template avoids this problem and results in the error being hopefully much less visible