S3 Commonprefix Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "title": "CommonPrefix",
  "type": "object",
  "description": "Container for all (if there are any) keys between Prefix and the next occurrence of the string specified by a delimiter. CommonPrefixes lists keys that act like subdirectories in the directory specified by Prefix. For example, if the prefix is notes/ and the delimiter is a slash (/) as in notes/summer/july, the common prefix is notes/summer/. ",
  "fields": [
    {
      "name": "Prefix",
      "type": "string"
    }
  ]
}