QS:Category separator
From LimeSurvey Manual
カテゴリー分け (category_separator)
説明
指定した文字が回答のカテゴリーを分ける記号として取り扱われます。
例
If you set this to the char ":", and have an answer with the following text "Fruit: orange" and another with "Fruit: apple", then a category of "Fruit" is assumed and will contain 2 items "orange" and "apple". This will be displayed as categories/items in the dropdown list.