For example in a hypermedia system about the life of Aristotle, a node can include a text description, a sound information, a graphics picture and a digital video all about the Aristotle's birthplace, Stagyra. Nodes in basic hypermedia model serve as primitive untyped abstractions in the information space. This simple model has been proved to be inadequate in many situations. There are many issues and also questions relating to this inadequacy and possible enhancements to the node concept in future hypermedia systems. The requirement for a composition mechanism becomes critical especially if we assume that hypermedia systems will have to deal with a vast amount of information.
Many questions arise when designing a composition mechanism.
Another important issue related to nodes is the ability to have typed rather than untyped nodes. Most of current hypermedia systems have untyped nodes. For example, they cannot have for example a 'Painting' node type in a Hypermedia system for Impressionism. Nodes - No adaptation mechanism for content and structure to current context. Nodes are passive repositories of information.