about P1 part of BIDI alogrithm

Hi,
About P1 in UBA
*P1. Split the text into separate paragraphs. A paragraph separator is kept
with the previous paragraph. Within each paragraph, apply all the other
rules of this algorithm.*

Here, what does paragraph mean? which symbols can *Split the text into
separate paragraphs?
I think only 'Enter' and '*Paragraph separator*' can do paragraph breaking.
And bidirectional character types B: *Paragraph separator, appropriate
Newline Functions, higher-level protocol paragraph determination.
 what's the meaning of 'appropriate Newline Functions' and 'higher-level
protocol paragraph determination'?

Thanks!

alex
Received on Mon Oct 10 2011 - 04:53:13 CDT