{
  "dataset": "How six systems classify rap, and what their disagreements reveal",
  "version": "1.0.0",
  "license": "CC BY 4.0",
  "as_of": "2026-08-17",
  "method": "Counts measured directly this session: the Every Noise at Once static map was parsed for genre names, MusicBrainz's genre list was pulled via its API, RateYourMusic's genre tree was read in a browser, Discogs style facets were read with their release counts, and Wikipedia's list was counted from wikitext.",
  "systems": [
    {
      "system": "Every Noise at Once",
      "owner": "Spotify, internal",
      "total": 6291,
      "rap": 366,
      "rapNote": "366 by word-boundary match across the rap family. The universally quoted 230 is the count of names containing the literal string \"hip hop\".",
      "built": "algorithmic clustering of listening behaviour"
    },
    {
      "system": "RateYourMusic",
      "owner": "community",
      "total": 4000,
      "rap": 107,
      "rapNote": "107 nodes under Hip Hop, 116 rendered entries, so 9 sit under more than one parent.",
      "built": "editor and community proposal, then a vote"
    },
    {
      "system": "MusicBrainz",
      "owner": "community",
      "total": 2184,
      "rap": 100,
      "rapNote": "Roughly 90 to 110 depending entirely on the matching method used.",
      "built": "community-maintained flat vocabulary"
    },
    {
      "system": "Wikipedia",
      "owner": "editors",
      "total": null,
      "rap": 96,
      "rapNote": "96 stylistic entries. 280 bullets in total once 149 geographic and 22 ethnic-fusion entries are included.",
      "built": "citation-gated editorial consensus"
    },
    {
      "system": "Discogs",
      "owner": "marketplace",
      "total": 673,
      "rap": 25,
      "rapNote": "About 25 rap-native styles. The genre page surfaces only 14.",
      "built": "fixed editorial style list applied by contributors"
    },
    {
      "system": "Spotify Web API",
      "owner": "Spotify, public",
      "total": 126,
      "rap": 1,
      "rapNote": "One. The seed is hip-hop. There is no rap, no trap, no drill. Now deprecated.",
      "built": "undocumented, frozen, then removed"
    }
  ],
  "archetypes": [
    {
      "name": "The consensus scene",
      "shape": "Present in every system that maintains a rap vocabulary.",
      "examples": "G-funk, grime, boom bap, trap",
      "means": "The scene is old enough, distinct enough and commercially large enough that behaviour-driven, editor-driven and retail-driven systems all had to name it. Consensus is a lagging indicator: it means the argument is over."
    },
    {
      "name": "The scene ahead of the press",
      "shape": "Present in the behaviour and community systems, absent from Wikipedia.",
      "examples": "sexy drill, jersey drill",
      "means": "Listeners and taggers are tracking something the citation-gated system cannot admit yet, because Wikipedia requires published sources and the publications have not caught up. This is where the front edge actually is."
    },
    {
      "name": "The press label",
      "shape": "Present ONLY on Wikipedia. No data system recognises it.",
      "examples": "mumble rap",
      "means": "A critical term applied from outside rather than a scene label used from inside. Systems built from artist and listener behaviour never adopted it because nobody was ever behaving it. It survives because journalism keeps citing journalism."
    },
    {
      "name": "The retail fossil",
      "shape": "Present ONLY on Discogs, often with a huge corpus attached.",
      "examples": "thug rap, at 23,916 releases",
      "means": "A category that describes how a record was SOLD rather than how it sounded, frozen around the physical-media era because a marketplace's vocabulary optimises for shelving. Larger than Horrorcore and Cloud Rap combined, and invisible everywhere else."
    },
    {
      "name": "The boundary object",
      "shape": "Present everywhere, filed incompatibly.",
      "examples": "grime",
      "means": "Wikipedia files it as a DERIVED genre rather than a subgenre, which is an explicit editorial ruling that it is not hip-hop. MusicBrainz lists it flat alongside rap genres. Every Noise puts seven grime variants inside the rap cluster. The question has already been answered three incompatible ways."
    },
    {
      "name": "The micro-scene",
      "shape": "Present in the fast community systems only, absent from the slow ones and from retail.",
      "examples": "plugg, sigilkore, digicore",
      "means": "Internet-native, timestamped, and legible mainly to the systems that let anyone add a tag. These leave the clearest documentary trail of any scene in history and the least institutional recognition."
    }
  ]
}