{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://openvisual.org/schema/profiles/vss/1.0",
  "title": "OVS Profile: Visual Snow Syndrome",
  "description": "Declares the OVS symptom types relevant to Visual Snow Syndrome. VSS is a neurological condition causing persistent visual disturbances — primarily visual snow — with no objective biomarker. This profile is the primary use case for the OVS standard.",
  "type": "object",
  "properties": {
    "profile_id":      { "const": "ovs-profile:vss" },
    "profile_version": { "const": "1.0" },
    "primary_symptoms": {
      "description": "Always present in VSS diagnosis",
      "type": "array",
      "items": { "type": "string" },
      "const": ["ovs:vss-snow", "ovs:blue-field-entoptic", "ovs:photopsia"]
    },
    "common_comorbidities": {
      "description": "Present in a majority of VSS patients",
      "type": "array",
      "items": { "type": "string" },
      "const": ["ovs:palinopsia", "ovs:floaters", "ovs:tinnitus", "ovs:glare", "ovs:halo"]
    },
    "occasional": {
      "description": "Present in a subset of VSS patients",
      "type": "array",
      "items": { "type": "string" },
      "const": ["ovs:diplopia", "ovs:oscillopsia", "ovs:migraine-aura", "ovs:contrast-loss"]
    }
  }
}