Each of the 'accept' and 'reject' sequence tables hold tables for en.wiki (['en']) and local.wiki (['local']) that each can hold a test sequence table The sequence table holds, at index [1], a test pattern, and, at index [2], a boolean control value. The control value tells string.findor mw.ustring.findto do plain-text search (true) or a pattern search (false). The intent of all this complexity is to make these searches as fast as possible so that we don't run out of processing time on very large articles.