Implement BIDI algorithm by line

Hi all,
I have a question about the BIDI algorithm implementation. Bidi algorithm
describe that one must resolving embedding level in a paragraph before break
paragraph into lines. I don't understand why. Should we firstly break
paragraph into lines and remember the paragraph level, and then resolving
the embedding levels for each character in lines? If we do it like this,
what issues would be occurred?

Thanks a lot!
Received on Mon Aug 22 2011 - 10:58:26 CDT