7. The apparatus of claim 6 , wherein the tag-based structural description language format utilizes Document Type Definitions (DTDs).
6. An apparatus including a processor for mapping and transforming information in a tag-based structural description language format to information in an HTML format, comprising: means for inputting into a map editor a first structural description of a first system that communicates over a protocol having the tag-based structural description language format; means for inputting into the map editor a second structural description of a second system that communicates over a protocol having the HTML format; means for displaying in a graphical user interface, a first plurality of structural descriptive elements of the first structural description and a second plurality of structural descriptive elements of the second structural description, wherein the second plurality of structural descriptive elements is a legal subset of the structural descriptive elements of the second structural description, the legal subset being a set of structural descriptive elements to which the first plurality of structural descriptive elements can legally be mapped; means for inputting into the map editor from the graphical user interface user selections among the displayed first and second pluralities of structural descriptive elements, the selections defining a mapping between the tag-based structural description language format and the HTML format, the mapping being a direct mapping from native structural descriptive elements in the tag-based structural description language format to native structural descriptive elements in the HTML format; means for outputting from the map editor the mapping between the tag-based structural description language format and the HTML format, based on the inputting from the second system, the first system, and the graphical user interface into the map editor; means for transforming a first document instance having the tag-based structural description language format into a second document instance having the HTML format based on said mapping. wherein the legal subset changes depending on previous user mapping selections among the second plurality of structural descriptive elements.