The final device of the standard of matter chart to be considered in this introduction is the
The final device of the standard of matter chart to be considered in this introduction is the concept of the facet. The facets basically provide a mechanism to assign pairs of property-value to the resources of information. A facet is simply a property; its values are called values of facet. Facets are typically employed to provide the kind of metadata which could differently be provided by attributes of SGML or XML.