17. A method for creating a multi-version document consisting essentially of a plurality of pages, comprising: identifying a first section of said multi-version document intended for representation in a first document version including a plurality of pages; identifying a second section of said multi-version document intended for representation in an alternative document version including a plurality of pages; tagging at least the second section of said multi-version document to indicate its association with said alternative version, wherein the multi-version document is represented as a graph structure including at least one selection node characterizing the alternative document version; storing at least a portion of the multi-version document as a single digital file including the first and second sections and the at least one selection node; and rendering a version of the multi-version document for a user, including locating, within the stored digital document, the at least one selection node, inputting, to the selection node, information sufficient to cause the identification of at least one of the plurality of alternative content nodes associated therewith, and outputting, in a user-determined format, a version of the multi-version document including a plurality of pages with content from the identified one of the plurality of alternative content nodes.
17. A method for creating a multi-version document consisting essentially of a plurality of pages, comprising: identifying a first section of said multi-version document intended for representation in a first document version including a plurality of pages; identifying a second section of said multi-version document intended for representation in an alternative document version including a plurality of pages; tagging at least the second section of said multi-version document to indicate its association with said alternative version, wherein the multi-version document is represented as a graph structure including at least one selection node characterizing the alternative document version; storing at least a portion of the multi-version document as a single digital file including the first and second sections and the at least one selection node; and rendering a version of the multi-version document for a user, including locating, within the stored digital document, the at least one selection node, inputting, to the selection node, information sufficient to cause the identification of at least one of the plurality of alternative content nodes associated therewith, and outputting, in a user-determined format, a version of the multi-version document including a plurality of pages with content from the identified one of the plurality of alternative content nodes. 19. The method of claim 17 , wherein said second section is selected from the group consisting of: a complete text; a summary of the complete text; audio data representing the complete text converted to speech; and a machine translation of the complete text to an alternative language.