Arabic Presentation Forms-A
Arabic Presentation Forms-A is a Unicode block encoding contextual forms and ligatures of letter variants needed for Persian, Urdu, Sindhi and Central Asian languages. This block also encodes 32 noncharacters in Unicode.
The presentation forms are present only for compatibility with older standards such as codepage 864 used in DOS, and are typically used in visual and not logical order.Block
History
The following Unicode-related documents record the purpose and process of defining specific characters in the Arabic Presentation Forms-A block:
