Joining Group - HA

HA is a joining group value that defines how the Arabic letter heh (and its contextual variants) behaves when connected to adjacent characters in cursive scripts like Arabic and Syriac. Specifically, HA represents the isolated and initial forms of heh, which do not connect to a following character but can connect to a preceding one, depending on the joining type of that neighbor. In practical terms, this means a character assigned to HA will appear with a right joining tail when preceded by a joining letter, but will stand alone if followed by a non-joining letter or at the start of a word. This value is crucial for shaping algorithms to correctly render text, ensuring that heh appears as a standalone glyph (isolated) or with a rightward connection, but never with a leftward connection. Examples include the Arabic letter ه and its Persian variant, which both follow this joining behavior, distinguishing them from groups like BEH or GAF that connect on both sides.