What is GroupDocs.Metadata? GroupDocs.Metadata for Java is a full featured class library which allows users to read and edit metadata associated with various document, image, audio, video and many other formats. It works with most notable metadata standards: XMP, Exif, IPTC, Image Resource Blocks, ID3 and format-specific metadata properties. The Metadata API is very flexible and easy to operate with. It provides extended capabilities allowing working with metadata in a unified way regardless of the file format....notable metadata standards: XMP, EXIF, IPTC, Image Resource Blocks...popular metadata standards: XMP, EXIF, IPTC, Image Resource Blocks...