Hello folks,

Having done some Arabic typesetting in the past, I now need to set a few pages in Persian for a book. This has made me realise the many subtle differences between Arabic and Persian typesetting (bit slow, I know). Apparently it is difficult to find information on this in English on the web, and I have this particularly nagging (because visually prominent) question:

in Persian, should there always be a space between a conjunctive waw and the following word?
is this space (if mandatory) breakable, or no line breaks are allowed after it?

For example:
in Arabic you would write "wasalAm"
وسلام

in Persian, do you write "wa salAm"?
و سلام

is that an optional thing?

Many thanks in advance for your help,
Juan