page_title: Metadata
hierarchical_section_title: Metadata
caption_attribution_description: English: Library card catalog Español: Catálogo de biblioteca de fichas
context_page_description: Metadata is data about data, that is information about other information. This is often useful. Libraries usually group books by subject and keep a catalog of the books. In that context the metadata in the catalog include various pieces of information including the author and the subject it is classified under. The index and table of contents of a book also present metadata.
  Digital cameras allow people to take pictures. Here the data is the picture taken, and the metadata is information about the picture taken, like when, photographic exposure, focal length and other technical details about how the camera made the picture. Some cameras, especially smartphones, have GPS and can include the location in metadata.
context_section_description: Metadata (also Meta data) is data about data, that is information about other information. This is often useful. Libraries usually group books by subject and keep a catalog of the books. In that context the metadata in the catalog include various pieces of information including the author and the subject it is classified under. The index and table of contents of a book also present metadata.
  Digital cameras allow people to take pictures. Here the data is the picture taken, and the metadata is information about the picture taken, like when (the date and time), photographic exposure, focal length and other technical details about how the camera made the picture. Some cameras, especially smartphones, have GPS and can include the location in metadata.
caption: A card catalog tells about the books in a library
exif: {"Image Make": "Camera", "Image Model": "3MP-9P2", "Image Orientation": "Horizontal (normal)", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "DSC Firmware Ver 1.13P", "Image DateTime": "2004:01:06 03:08:32", "Image YCbCrPositioning": "Co-sited", "Image Copyright": "Digital CameraVer1.13P", "Image ExifOffset": "306", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "9132", "Thumbnail JPEGInterchangeFormatLength": "6047", "EXIF ExposureTime": "1/30", "EXIF FNumber": "14/5", "EXIF ExposureProgram": "Program Normal", "EXIF ISOSpeedRatings": "50", "EXIF ExifVersion": "0210", "EXIF DateTimeOriginal": "2004:01:06 03:08:32", "EXIF DateTimeDigitized": "2004:01:06 03:08:32", "EXIF ComponentsConfiguration": "YCbCr", "EXIF ShutterSpeedValue": "2453/500", "EXIF ApertureValue": "14/5", "EXIF BrightnessValue": "1", "EXIF ExposureBiasValue": "1", "EXIF MaxApertureValue": "189/25", "EXIF SubjectDistance": "2/5", "EXIF MeteringMode": "CenterWeightedAverage", "EXIF LightSource": "Flash", "EXIF Flash": "Flash fired, auto mode", "EXIF FocalLength": "8", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "2032", "EXIF ExifImageLength": "1520", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "9008", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "0/0", "EXIF Saturation": "Normal", "EXIF Sharpness": "Soft", "EXIF SubjectDistanceRange": "3"}