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.
There is no mechanism to adapt the content and structure of a node to current context. For example a node can include two different texts explaining nuclear power. The two texts can differ in the prerequired background from end-users. Thus, the same node can present different contents in a novice user than in a more experienced user about nuclear power. In the same way structure in which a node presents its information to users can be adaptive to current context.