mermaid 記法テスト

```mermaid
classDiagram
    class Exif {
        +ImageWidth
        +ImageHeight
        +BitsPerSample
        +Compression
        +PhotometricInterpretation
        +Orientation
        +SamplesPerPixel
        +DateTime
        +ImageDescription
        +Make
        +Model
        +Software
        +Artist
        +Copyright
        +ExifIFDPointer
        +GPSInfoIFDPointer
    }
    class ExifIFD {
        +ExposureTime
        +FNumber
        +ExposureProgram
        +ISO
        +ExifVersion
        +DateTimeOriginal
        +DateTimeDigitized
        +ShutterSpeedValue
        +ApertureValue
        +BrightnessValue
        +ExposureBiasValue
        +MeteringMode
        +Flash
        +FocalLength
        +MakerNote
        +UserComment
    }
    class GPSInfoIFD {
        +GPSLatitudeRef
        +GPSLatitude
        +GPSLongitudeRef
        +GPSLongitude
        +GPSAltitudeRef
        +GPSAltitude
        +GPSTimeStamp
        +GPSSatellites
        +GPSStatus
        +GPSMeasureMode
        +GPSDOP
        +GPSSpeedRef
        +GPSSpeed
        +GPSTrackRef
        +GPSTrack
        +GPSImgDirectionRef
        +GPSImgDirection
        +GPSMapDatum
        +GPSDestLatitudeRef
        +GPSDestLatitude
        +GPSDestLongitudeRef
        +GPSDestLongitude
        +GPSDestBearingRef
        +GPSDestBearing
        +GPSDestDistanceRef
        +GPSDestDistance
        +GPSProcessingMethod
        +GPSAreaInformation
        +GPSDateStamp
        +GPSDifferential
    }
    Exif --|> ExifIFD
    Exif --|> GPSInfoIFD
```