8. A computer-based method of coding a document for presentation on a presentation apparatus, comprising: defining a structure section in a hierarchical structured format which specifies a structure of said document in terms of document elements, the structure section being disposed in a structural section containment structure; defining a time section in said hierarchical structured format that includes a time constraint, the time section being disposed in a time section containment structure, wherein the time constraint specifies that the document elements it acts upon have to be presented consecutively; linking the time section and the structure section to establish structural and temporal coding of the document, wherein the structure section and the time section are defined in separate sections and wherein the coding of the document constitutes an XML (Extended Markup Language) application; defining a style section in the hierarchical structured format which includes style rules specifying properties of one or more document elements selected from the structure section, the time constraint acts upon a style rule of the style section, the linking including linking the time section, style section, and the structure section to establish structural, style, and temporal coding of the document, wherein the document elements in the structure section which are acted upon by the time constraint are selected by a CSS (Cascading Style Sheets) selector syntax; and at least one of (i) presenting the coded document on a presentation apparatus and (ii) storing the coded document for subsequent presentation.
8. A computer-based method of coding a document for presentation on a presentation apparatus, comprising: defining a structure section in a hierarchical structured format which specifies a structure of said document in terms of document elements, the structure section being disposed in a structural section containment structure; defining a time section in said hierarchical structured format that includes a time constraint, the time section being disposed in a time section containment structure, wherein the time constraint specifies that the document elements it acts upon have to be presented consecutively; linking the time section and the structure section to establish structural and temporal coding of the document, wherein the structure section and the time section are defined in separate sections and wherein the coding of the document constitutes an XML (Extended Markup Language) application; defining a style section in the hierarchical structured format which includes style rules specifying properties of one or more document elements selected from the structure section, the time constraint acts upon a style rule of the style section, the linking including linking the time section, style section, and the structure section to establish structural, style, and temporal coding of the document, wherein the document elements in the structure section which are acted upon by the time constraint are selected by a CSS (Cascading Style Sheets) selector syntax; and at least one of (i) presenting the coded document on a presentation apparatus and (ii) storing the coded document for subsequent presentation. 9. The computer-based method claimed in claim 8 , wherein the hierarchical structured format is selected from the group consisting of SGML, HTML, and XML.