As it's shown on the website (so it's romaji if japanese name)
As it's shown when you start playing the beatmap (so it's kana/kanji if japanese name)
If the map can not be downloaded with its audio file
Is null if mode is 1 or 3 (taiko or mania) or if beatmap has no objects
Approach Rate https://osu.ppy.sh/wiki/en/Beatmap/Approach_rate
Health Drain https://osu.ppy.sh/wiki/en/Gameplay/Health
Overall Difficulty https://osu.ppy.sh/wiki/en/Beatmap/Overall_difficulty
Circle Size https://osu.ppy.sh/wiki/en/Beatmap/Circle_size
Is null if mode is 1, 2, or 3 (taiko, ctb, or mania) or if beatmap has no objects
Star Rating https://osu.ppy.sh/wiki/en/Beatmap/Star_rating
If the map can not be downloaded from the website
md5 hash of the beatmap
The length of the beatmap in seconds without the breaks
The number representing the Gamemode for which the API responsed (it may not be the requested Gamemode if the beatmap is exclusive to Taiko/CTB/Mania)
Undocumented! Is null if the beatmap(set) is not featured in any beatmap pack https://osu.ppy.sh/beatmaps/packs
As it's shown on the website (so it's romaji if japanese name)
As it's shown when you start playing the beatmap (so it's kana/kanji if japanese name)
The length of the beatmap in seconds with the breaks
The name of the difficulty/beatmap (for example, "Mirash's Insane")
Also known as the id of the category the beatmap is in, for example it'd be 1 if it was ranked