I wish we could edit posts sometimes, especially when you write a whole load of code that is supposed to be separated by paragraph breaks, and PCA takes them all out. (>_<)
Any DTP program need to distinguish between line breaks and paragraph breaks. HTML puts a <BR> code when you press Shift Enter, but a <P> code when you press Enter. PageMaker uses the Shift Enter convention too. Very handy when typing verses with a style that has extra spacing before or after the paragraph. If you got a full paragraph break at the end of each line of a verse you would have to fiddle a lot to get the desired half a line space or three quarters line space between verses.