A method of transforming a Datastream into a desired method of output. For example an image datastream might have a 'getThumbnail' disseminator which will return the image in a thumbnail size. Disseminators can also be used to transform XML via XSLT. See the fedora object model documentation for further detail here.
a structure within a digital object used to associate a uniquely specified class of operations, also known as a Content Type , with a set of data elements from that same digital object