The Quranic Arabic Corpus is an annotated linguistic resource consisting of 77,430 words of Quranic Arabic. The research project is led by Kais Dukes at the University of Leeds

University of Leeds

The University of Leeds is a British Redbrick university located in the city of Leeds, West Yorkshire, England...

, and is part of the Arabic language computing research group within the School of Computing, supervised by Eric Atwell. The project aims to provide a richly annotated linguistic resource for researchers wanting to study the language of the Quran. The grammatical analysis helps readers further in uncovering the detailed intended meanings of each verse and sentence. Each word of the Quran is tagged with its part-of-speech as well as multiple morphological features. Unlike other annotated Arabic corpora, the grammar framework adopted by the Quranic Corpus is the traditional Arabic grammar of i'rab .

The research project includes:

• A manually verified part-of-speech
  Part-of-speech tagging
  In corpus linguistics, part-of-speech tagging , also called grammatical tagging or word-category disambiguation, is the process of marking up a word in a text as corresponding to a particular part of speech, based on both its definition, as well as its context—i.e...
  
   tagged Quranic Arabic corpus.
• An annotated treebank
  Treebank
  A treebank or parsed corpus is a text corpus in which each sentence has been parsed, i.e. annotated with syntactic structure. Syntactic structure is commonly represented as a tree structure, hence the name Treebank...
  
   of Quranic Arabic.
• A novel visualization of traditional Arabic grammar
  Arabic grammar
  Arabic grammar is the grammar of the Arabic language. Arabic is a Semitic language and its grammar has many similarities with the grammar of other Semitic languages....
  
   through dependency graphs.
• Morphological search for the Quran.
• A machine-readable morphological lexicon of Quranic words into English.
• A part-of-speech concordance
  Concordance
  Concordance can mean:* Concordance , a list of words used in a body of work, with their immediate contexts* Concordance , the presence of the same trait in both members of a pair of twins...
  
  for Quranic Arabic organized by lemma.
• An online message board for community volunteer annotation.

Corpus annotation assigns a part-of-speech tag and morphological features to each word. For example, annotation involves deciding whether a word is a noun or a verb, and if it is inflected for masculine or feminine. The first stage of the project involved automatic part-of-speech tagging by applying Arabic language computing technology to the text. The annotation for each of the 77,430 words in the Quran was then reviewed in stages by two annotators, and improvements are still ongoing to further improve accuracy.