The structure is way better and easier to understand overall. I just have some minor corrections and suggestions:
General -> Rules:
- Metadata fields, except for tags, over 81 characters must be shortened.
I think it would sound more natural to change the order within the sentence like this: Metadata fields over 81 characters, except for tags, must be shortened.
General -> Guidelines -> When multiple metadata options are available:
Aim to match Ranked or Loved beatmaps. Follow what is most recent and common, then verify that metadata is correct and fix as needed.
The exception "This does not apply if the artist intentionally uses a different alias for different song or album releases." should probably be added here.
General -> Guidelines -> When multiple metadata options are available:
- Official romanisations/translations are preferred for romanised fields, so long as they are easily found and commonly recognised.
I tried bringing this up before but it was never addressed so I'll say it again: Official translations should not be preferred for romanised fields because unofficial translations don't exist (or at least are not allowed) so the only thing they can be preferred over are unofficial
romanisations, which doesn't make much sense because it's called romanised field after all so giving priority to translations is not very logical, they should be optional.
This point also conflicts with the sentence under the Romanisation section "If the metadata has an official translation or romanisation, it is allowed to be used as-is in the romanised fields instead of romanising it yourself." because that sounds like an allowance and not like a preference/priority.
General -> Allowances -> For remixes, covers, or performances:
- The original artist may be used in the artist field, as long as the title field is modified to show that the song is not the original version. This marker should be in parentheses and contain the remix/cover artist or the performer as well as a descriptor. For example, the track triangles composed by cYsmix covered by mocha4life can be formatted as cYsmix - triangles (mocha4life Cover).
The explanation regarding the formatting is ambiguous because first it says "This marker should be..." and then "can be formatted as...", if it's an allowance it should probably just be "can/may" and not "should", right?
Handling Symbols
This could just be simplified to "Symbols" to make it more consistent with the other headers.
Handling Symbols -> Rules:
- The following Unicode Symbol subsets should have leading and trailing spaces when they can be romanised:
Supplemental Arrows-A, Supplemental Arrows-B, Miscellaneous Symbols and Arrow
Dingbats
Miscellaneous Symbols
This does not apply if the artist purposefully uses symbols in ways that do not suggest spaces. Other character sets are handled on a case-by-case basis.
Why are these specific subets of symbols listed here? Are there other categories where this rule doesn't apply?
Artist -> Marker Rules
The term "marker" here isn't ideal because it's also used for Title -> Markers where it refers to different things. It would probably be clearer if a different term was used here or if the other markers are labaled as "Length/Version Markers" to distinguish them.
Artist -> Marker Rules -> Character (CV: Voice Actor) and Character (VO: Voice Actor):
- If other artist(s) use a similar marker, such as c.v., CV., ~cv~, etc., replace it with this format.
This could be written in an easier way like "Similar markers, such as c.v., CV., ~cv~, etc., must be replaced with this format."
Was the point about "For live action, credit the voice actor only." left out intentionally?
Artist -> Allowances:
- Artists may be simply listed with ,, & or + in between each artist.
Instead of "+" I'd use "x" here because it's much more common. Also, I assume this is not supposed to be an exhaustive list of symbols, therefore "etc." should be added to indicate that.
Title -> Rules -> When a track is made of two or more songs you must do either one of the following:
- List the titles clearly with a dividing symbol in-between such as ,, &, +, /, etc.
Again I'd replace "+" with a more common symbol/term, in this case "vs.", for example used in
beatmapsets/325158 and
beatmapsets/707380.
Markers
Is the reason why some of them are listed under Rules and some under Guidelines because the first group is always added and the second group only in case the song already has the marker is some form? I can't think of a concrete term but maybe there's a clearer way to indicate that these are 2 separate lists because right now they're both just labeled as "Marker Categories". I get that each of them is within the Rules and Guidelines section respectively, but still.
Markers -> Rules:
- Songs with length markers must fully replace them with the standard marker.
Perhaps change this to "Songs with existing length markers must fully replace them with the relevant marker from the list below." to make it clearer.
Markers -> Rules:
- Songs without a length marker that fit a rules marker category must add the corresponding one at the end.
This one also took me a few times of re-reading it to understand what it means, it could be changed to something like this to explain it better: "Songs without a length marker that fit one of the marker categories below must add the corresponding one at the end.
Markers -> Rules -> (Cut Ver.)
I think it would be a good idea to add "Songs that are a full loop of a looping track will not be considered cut." as clarification.
Markers -> Guidelines
The 2 sentences at the beginning should be listed with bullet points because they're guidelines themselves, not just an explanation for this section.
It would also be nice if the order of (Short Ver.) and (Game Ver.) was reversed so that they're in order from most common to least common.
Markers -> Guidelines -> Marker Categories -> (Game Ver.):
- Commonly found in video game songs. Use this marker when there is an existing length marker such as ~Game Size~, (Game Size), game OP edit, OP Version.
The part about "Commonly found in video game songs" could be removed entirely because it should be obvious and also doesn't really provide useful information for the guideline.
I'm also not sure about "OP Version" because this is different from the others in the sense that it doesn't include the word "Game" at all. Are there examples where this has been changed to (Game Ver.)?
Markers -> Guidelines -> Marker Categories -> (Short Ver.):
- Usually used in game openings to signal that a longer version actually exists.
Similarly, this part seems rather unnecessary and could be omitted.
Markers -> Guidelines -> Marker Categories -> (##### Ver.):
When song titles already have a length marker not covered above, it should be changed to a descriptive (#### Ver.) marker using title case.
What does "descriptive" refer to here?
There should be an additional "#" here to be consistent with the first mention of this marker.
I also think it would be important to add an example for this one to make it easier to understand the use cases.
Markers -> Guidelines -> Marker Categories -> (##### Ver.):
Exceptions would be for when the length marker is so stylised it is considered part of the title, such as Pippiquest (Pippi x Mocha Romantic Movie Remix Edition)
Is this strictly about stylisation or just having an extravagant version naming? Assuming it's the latter, I don't really see why it wouldn't still fall under the same guideline since you could very well just replace "Edition" with "Ver." without ruining the naming scheme. Stylisation would be more related to things like formatting (the entire point of standardized markers is to make formatting consistent) and capitalisation (which is already addressed in the allowance of this section).
Markers -> Allowances:
- Alternate casing for markers may be used if the rest of the song title is stylised to fit the formatting.
"Alternate" should probably be changed to "Alternative" to match the previous instance of this allowance.
Sources -> Rules:
The Source field must be precise. Use the most specific source instead of series or project names, unless multiple sources within a series apply.
The word "general" could be added before "series or project names" to emphasize that it's an umbrella term.
Sources -> Guidelines
Bullet points should be added before "If a track..." and "Website names are only valid sources, if the song...".
Tags -> Rules -> Tags must include the following items when applicable:
- Guest difficulty creators, storyboarders, skinners, and hitsounders.
I'd reword this to "Guest difficulty, hitsound, storyboard and skin creators." because "skinners" sounds strange and it's more consistent this way.
It could be useful to add this sentence from the current ranking criteria because it's something a lot of people don't know or get wrong often: "Usernames in tags containing single characters separated by spaces must have the spaces replaced with underscores."
Tags -> Rules -> Tags must include the following items when applicable -> At least one song genre and one language tag:
- If the lyrics in the song have no meaning, use other as the language tag.
I don't think putting "other" in the tags is useful, in this case it would be better to just use "gibberish" or something like that.
Tags -> Rules -> Tags must include the following items when applicable:
- Tags must be related to the beatmap. Describing the style, song, storyboard, video, or background content is fine.
The "is fine" part sounds a bit weird here, it could be simplified to "Tags must be related to the beatmap, such as describing the style, song, storyboard, video, or background content."
Maybe also add the part about tags not being misleading from the current RC?
Tags -> Guidelines -> Tags should include the following items when applicable:
- Easily searched versions of difficult-to-write parts of the metadata.
I suggest adding "... such as contractions with the apostrophe removed" since it's a common example.
Tags -> Guidelines -> Tags should include the following items when applicable
Another bullet point mentioning things like album/EP/single name could be added.
Romanisation -> Language and Writing-system Romanisation Rules -> Japanese:
- ā to aa, ū to uu, ē to ee
Shouldn't there also be "ī to ii" here (even if it's rare)?
Romanisation -> Language and Writing-system Romanisation Rules -> Chinese:
For other dialects: Left to mapper's discretion, contacting a native speaker is recommended.
In my opinion this would sound better as a complete sentence like "For other dialects, it's left to the mapper's discretion. Contacting a native speaker is recommended."
Romanisation -> Language and Writing-system Romanisation Rules -> Other languages or systems not covered:
- Use a system common and recognisable.
I'd change the order around to "Use a common and recognisable system." to make it sound more natural.