section_path: History/Standardization
section_name: Standardization
paragraph_text: Standardization
  
  Abu al-Aswad al-Du'ali (c. 603 –689) is credited with standardizing Arabic grammar, or an-naḥw (النَّحو "the way"), and pioneering a system of diacritics to differentiate consonants (نقط الإعجام nuqaṭu‿l-i'jām "pointing for non-Arabs") and indicate vocalization (التشكيل at-tashkīl). Al-Khalil ibn Ahmad al-Farahidi (718–786) compiled the first Arabic dictionary, Kitāb al-'Ayn (كتاب العين "The Book of the Letter ع "), and is credited with establishing the rules of Arabic prosody. Al-Jahiz (776–868) proposed to Al-Akhfash al-Akbar an overhaul of the grammar of Arabic, but it would not come to pass for two centuries. The standardization of Arabic reached completion around the end of the 8th century. The first comprehensive description of the ʿarabiyya "Arabic", Sībawayhi's al - Kitāb, is based first of all upon a corpus of poetic texts, in addition to Qur'an usage and Bedouin informants whom he considered to be reliable speakers of the ʿarabiyya.