Behnam Esfahbod
Behnam Esfahbod
/cc @brawer Right. What we've been doing so far has been to file tickets with CLDR for the fixes, and either wait on those to be resolved, or hard-code what...
"Ketab-e Kuche" calls the feature ایرانیک (Iranic):  It can be used inline:  Or on a whole line/paragraph:  2.  3.  4. ...
On the existing font practices, Adobe Arabic has an "Italic" variation: https://typekit.com/fonts/adobe-arabic 
In current digital typesetting systems, it's what @khaledhosny said. BUT, actually, there are evidence of slanting direction being applied paragraph-/page-/document-wide. This talk (by @lironlavitur) covers the topic (mostly) for the...
Yes, I believe we can recommend the most-common styles, specially those mentioned in publishing guidelines.
Zarnegar 5.2 Catalog (http://sinasoft.com/Downloads/zarnegar5.2/catalog/Zar52Cat.pdf) has some good examples of variant glyphs, which can be used to improve justification. From Page 8:  From Page 9:  From Page 10, word-based...
Regarding word elongation/stretching, this MS thesis covers some rules of Nastaliq and a mathematical model for applying it on a font outline. Mohsen, Shahab. "The Problem of Stretching in Persian...
Three main topics were discussed this morning about justification and I try to summarize the discussion here: 1) Having justification/elongation/stretching method of a run (span) of text inside a paragraph...
Regarding item (2) from https://github.com/w3c/alreq/issues/57#issuecomment-273401163, here's a good example from a book published recently in London by H&S Media, a publisher specialized in Persian books. https://books.google.com/books?id=ujLeDAAAQBAJ (p. 14)  As...