The 5 document dimensions
These 5 dimensions are used to describe the different parts of a multimedia document. Below XHTML documents are used as an example of that, but you could say something similar about e.g. a CD ROM.
Content: here are the things, that could have been prepared in other programs: text, graphics, video, sound, applets, ActiveX, Shockwave, Flash etc. (Note that these parts might also have these 5 dimensions, but from the point of view of XHTML, it's "just" content.)
Structure: here the content is "bent into shape", through headlines, lists, tables etc.
Meaning: these tags also carry a meaning. E.g. a headline h1 followed by a headline h2 means, that the last headline is subordinate to the first. Or an enumerated list typically means, that the items are ordered after importance - the most important item first.
Layout: we typically do this with CSS, handling colors, fonts, exact placement etc.
Concept last updated: 06/05 2004.