  Words are properly segmented in the Persian writing system; in practice,
however, these writing rules are often neglected, resulting in single words
being written disjointedly and multiple words written without any white spaces
between them. This paper addresses the problems of word segmentation and
zero-width non-joiner (ZWNJ) recognition in Persian, which we approach jointly
as a sequence labeling problem. We achieved a macro-averaged F1-score of 92.40%
on a carefully collected corpus of 500 sentences with a high level of
difficulty.
