11. An apparatus for revealing a document's marked structure, comprising: a look up table; an input adapted to receive a file that is representative of said document; a parser for identifying marked content in said file, said parser comprising: means for parsing said file into markers; means for building a vector of all markers, said vector comprising the function and location of each of said markers; wherein links are established between a vector that holds the tags from a newly read in document to all those tags that are currently held in a look up table, while the document is being parsed; wherein said vector is made of marked content in said document, and locations within a document information stream, when said document is read; an interface for user access to said marked content; means for accessing a glossary for each marker to determine what each marker is and what each marker does; a display for presenting said document and for providing instructions indicating marked structure in said document; wherein an interface is provided such that a person reviewing said document is instructed in the operation and recreation of said document from a casual on-screen review of said document.
15. The apparatus of claim 11, wherein a performance support mode is provided in which display units are generated for each marking and displayed for each marking.