Exif (Exchangeable Image File Format)
Exif is a standard format for metadata in digital photos. It is used for the automatic storage of numerous technical parameters such as date taken, aperture value, exposure time, sensitivity of the image sensor, camera manufacturer or geolocalisation. Although a few content-related data fields are provided, most image management systems tend to use the IPTC-IIM or XMP formats for this purpose, as these were developed especially for the subsequent documentation of image content.
IPTC-IIM (IPTC Information Interchange Model)
Like Exif, the IPTC-IIM standard is a data format for storing metadata in image files. Unlike Exif, the focus here is on content documentation. Important data fields are, for example
- Title
- Copyright
- Image description (Caption)
- Keywords (keywords)
- Location (country, state, city)
Dublin Core (was defined in Dublin)
Dublin Core is a general metadata schema for describing electronic resources that was developed in 1995. Agreement was reached on 15 core elements that should be decisive for the documentation of files on the Internet. These include technical, content-related and copyright aspects.
XMP (Extensible Metadata Platform)
XMP is a data format developed by Adobe for storing metadata in image files. As modern file formats such as WebP rely on XMP and no longer offer IPTC-IIM support, XMP should be the first choice. The format is flexible and also satisfies those who want to use tried and tested data fields and structures, as the IPTC schema can also be mapped with XMP. You can also find more information on this in the teamnext blog.