In this spirit, MCF should be able to represent the meta content that proposals such as the Dublin Core aim to cover. What is important is the conceptual framework behind MCF and agreement on the meaning of the actual terms used to describe the content. Some of these objects denote content objects such as web pages, desktop files, etc. Some others might denote content entities such as newsgroup threads. Yet others might denote physical objects such as people, companies, etc.
Content is typically about people, companies, etc.
A set of objects. It is very important to note that this predicate has to be used consistently everywhere for MCF to really work. Another subset of these objects is called Layers . The layers are arranged in a total order. Since the layers themselves are units, the relation between the layers themselves is expressed as assertions.