type: map
mapping: 
  "schema_file": { type: text }
  "name": { type: str, required: yes }
  "version": { type: text, required: yes }
  "package_version": { type: text }
  "maintainer": { type: str, required: yes }
  "operatingsystem": { type: seq, sequence: [ {type: str} ] }
  "architecture": { type: seq, sequence: [ {type: str} ] }
  "description": { type: str }
  "bugreporting": { type: str }
  "dependencies": 
    type: seq
    sequence: 
      - type: map
        mapping:
          "name": { type: str, required: yes }
          "minimum_version": { type: text }
          "maximum_version": { type: text }
          "minimum_package_version": { type: text }
          "maximum_package_version": { type: text }
          "allowed_versions": { type: text }
          "native": { type: bool }
          "type": { type: any, pattern: /(native|tpkg)$/ }
  "conflicts":
    type: seq
    sequence:
      - type: map
        mapping:
          "name": { type: str, required: yes }
          "minimum_version": { type: text }
          "maximum_version": { type: text }
          "minimum_package_version": { type: text } 
          "maximum_package_version": { type: text } 
          "native": { type: bool }
          "type": { type: any, pattern: /(native|tpkg)$/ }
  "externals":
    type: seq
    sequence:
      - type: map
        mapping:
          "name": { type: text, required: yes }
          "data": { type: text }
          "datascript": { type: text }
          "datafile": { type: text }
  "files":
    type: map
    mapping:
      "file_defaults":
        type: map
        mapping:
          "posix":
            type: map
            mapping:
              "owner": { type: text }
              "group": { type: text }
              "perms": { type: text }
      "dirs_defaults":
        type: map
        mapping:
          "posix":
            type: map
            mapping:
              "owner": { type: text }
              "group": { type: text }
              "perms": { type: text }
      "files":
        type: seq
        sequence:
          - type: map
            mapping:
              "path": { type: text, required: yes }
              "encrypt": { type: any, pattern: /^true$|^precrypt$/ }
              "init":
                type: map
                mapping:
                  "start": { type: int }
                  "levels": { type: seq, sequence: [ { type: int } ] }
              "crontab":
                type: map
                mapping: { "user": { type: str } }
              "posix":  
                type: map
                mapping: { "owner": { type: text },
                           "group": { type: text },
                           "perms": { type: text } }