The HyperImage platform supports the linking of (audio)-visual objects, texts and mixed-media documents. References between images in total, regions of images, annotations regarding the images, and other media, are achieved by means of hyperlinks.
A PHP/Harmoni digital asset management tool, Concerto allows the cataloguing of multimedia in DublinCore, VRA, and user-defined schemes. Media can be searched across schemes, put into annotated slideshows, or used in other programs such as Segue2.