What image formats are allowed within the xHTML document of an iXBRL file?

In an effort to avoid potential threats caused by certain file formats used for saving images, images included in the xHTML document may only be saved in the following formats:

  • PNG
  • GIF
  • SVG

If an image of a different format is included within your ESEF file, you will get the error message Violation: “imageFormatNotSupported” when your file is validated.