Clarify "Cover unifiers" rule

Main point is to adjust the explanation to allow usage of existing artist entries (was not clear before asking for clarification on Discord).

Other than that, clearer language and added excerpt

Author: Hans5958

src/content/rules/cover-unifiers.mdx

@@ -19,8 +19,9 @@ mikumod_support: "True"
 relevant_tag_id: 6751
 automatically_fixed: "False"
 complete_validation: "True"
+excerpt: You may create cover unifier song entries for out-of-scope songs if it has 5 derived song entries on VocaDB. If the artist doesn't exist on VocaDB, add it as a custom artist.
 ---
 
-If the out-of-scope original version has 5 or more derived song entries (such as remixes or covers) on VocaDB, it can be created as a [cover unifier](https://vocadb.net/T/6751) song entry.
+If an out-of-scope song has at least 5 song entries as alternate versions (such as remixes or covers) on VocaDB, it can be created as a [cover unifier](https://vocadb.net/T/6751) song entry.
 
-Cover unifier artists who are out-of-scope should be credited as "custom artists" (= no entry). The [Temporary artist entry](https://vocadb.net/Ar/139625) can be used to bypass the creation form.
+Do not create artist entries solely for these cover unifiers. You can add existing artist entries to a song entry if it is added as an artist on an in-scope entry (e.g. using "[HACHI](https://vocadb.net/Ar/49)" for "[KICK BACK](https://vocadb.net/S/454815)"), but do not create new artist entries just for crediting a cover unifier. When no artist entry can be added, you can use [the "Temporary artist" entry](https://vocadb.net/Ar/139625) so that you can create the song entry.

src/content/rules/entry-missing-artists-tag.mdx

@@ -19,4 +19,4 @@ mikumod_support: "False"
 relevant_tag_id: 2808
 ---
 
-If the song has no known artist credits available, use the [entry missing artists](https://vocadb.net/T/2808/entry-missing-artists) tag.
+If the song has no known artist credits available, use the "[Entry missing artists](https://vocadb.net/T/2808/entry-missing-artists)" tag.

src/content/rules/extended-versions-as-remixes.mdx

@@ -19,6 +19,7 @@ mikumod_support: "Planned"
 automatically_fixed: "False"
 complete_validation: "True"
 relevant_tag_id: 3068
+excerpt: Use [the "Remix" song type](/rules/remix-classification) for [extended versions](https://vocadb.net/T/3068) of a song.
 ---
 
-Entries tagged with [extended version](https://vocadb.net/T/3068) should use the `remix` song type.
+Entries tagged with [extended version](https://vocadb.net/T/3068) should use [the "Remix" song type](/rules/remix-classification).

src/content/rules/faint-vocals.mdx

@@ -17,6 +17,7 @@ status: Active
 rule_context:
 mikumod_support: "False"
 relevant_tag_id: 12083
+excerpt: Use the "[faint vocals](https://vocadb.net/T/12083)" tag for original songs with faint vocals.
 ---
 
-For original songs with faint vocals that are almost fully [instrumental](https://vocadb.net/T/208/instrumental), use the [faint vocals](https://vocadb.net/T/12083) tag.
+For original songs with faint vocals that are almost fully [instrumental](https://vocadb.net/T/208/instrumental), use the "[faint vocals](https://vocadb.net/T/12083)" tag.

src/content/rules/first-published-as-original.mdx

@@ -17,8 +17,9 @@ status: Active
 rule_context:
 mikumod_support: "Planned"
 relevant_tag_id:
+excerpt: Original version should be the entry with the earliest publish date.
 ---
 
-Original version should be the entry with the earliest publish date.
+When there are multiple versions being the original, check the publish date. The original version should be the entry with the earliest publish date. Put the other version as a derivative of it.
 
-If multiple versions of a song are uploaded simultaneously, it doesn't generally matter which is picked as the original version.
+If multiple versions of a song are [uploaded simultaneously](/rules/simultaneous-uploads), it doesn't generally matter which is picked as the original version.

src/content/rules/no-out-of-scope-song-entries.mdx

@@ -19,7 +19,15 @@ mikumod_support: "Planned"
 relevant_tag_id: 6751
 ---
 
-Songs without voice-synth vocals (Vocaloid/UTAU/CeVIO/etc.) should not be added, unless:
+A song/video must use a voice synthesizer (e.g. Vocaloid/UTAU/CeVIO) to be added to VocaDB.
+
+Some songs can be added as exceptions:
 
 - The song is part of an album entry.
-- The song has at least 5 voice-synth covers (these can be added as [cover unifier entries](https://vocadb.net/T/6751/out-of-scope-cover-unifier)).
+- [The song has at least 5 voice-synth covers (as an cover unifier).](/rules/cover-unifiers)
+
+Note that some songs are not allowed:
+
+- [The song is derived from a AI-generated song](/rules/no-ai-generated-songs) (e.g. a cover of an AI-generated song).
+- [The Music PV is not official, doesn't feature an in-scope character in the visuals, and has less than 100,000 views.](/rules/unofficial-out-of-scope-music-pvs)
+- The song is not covered on any song type, including [the "Other" song type](/rules/other-song-type-classification).

src/content/rules/out-of-scope-artist-crediting-for-derived-songs.mdx

@@ -18,4 +18,4 @@ rule_context:
 mikumod_support: "Planned"
 ---
 
-For derived songs, credit out-of-scope original artists in the song description ([example](https://vocadb.net/S/604363)), unless an original version has been specified as a song entry (cover unifier for example).
+For songs derived from an out-of-scope song, credit the original artists in the entry description ([example](https://vocadb.net/S/604363)), unless the out-of-scope song has a song entry that can be added as the original version (e.g. [cover unifiers](/rules/cover-unifiers).

src/content/rules/short-versions-as-remixes.mdx

@@ -19,6 +19,7 @@ mikumod_support: "Planned"
 automatically_fixed: "False"
 complete_validation: "True"
 relevant_tag_id: 4717
+excerpt: Use [the "Remix" song type](/rules/remix-classification) for [short versions](https://vocadb.net/T/4717/) of a song.
 ---
 
-Entries tagged with [short version](https://vocadb.net/T/4717/) should use the `remix` song type.
+Entries tagged with [short version](https://vocadb.net/T/4717/) should use [the "Remix" song type](/rules/remix-classification).

src/content/rules/specify-producers-roles-if-multiple-producers.mdx

@@ -16,6 +16,7 @@ rationale:
 status: Active
 rule_context:
 mikumod_support: "Planned"
+excerpt: Specify producer roles ("Composer", "Arranger", "Voice manipulator") if the song has multiple producers
 ---
 
-If the song has multiple producers, specify the roles if available: `Composer`, `Arranger` & `Voice Manipulator`.
+If the song has multiple producers, specify the roles if available: "Composer", "Arranger" and/or "Voice Manipulator".

src/content/rules/tag-description-required.mdx

@@ -18,14 +18,13 @@ rule_context: Content policy
 mikumod_support: "True"
 automatically_fixed: "False"
 complete_validation: "True"
+excerpt: Include a description on tags, at least explaining its intended usage in clear English language.
 ---
 
 All tags should include a valid description.
 
 A tag's description should explain its intended usage in clear English language.
 
-For normal tags, skip generic usage instructions such as "tag for albums/artist/songs...".
+For normal tags, skip generic usage instructions explaining the type scope, such as "tag for albums/artist/songs...". Use "Valid for" restrictions instead.
 
-- Use "Valid for" restrictions instead.
-
-Include source links when quoting information from external sources (such as Wikipedia).
+Include source links when quoting information from external sources, such as Wikipedia.