International Journal of Information Studies Aicha GHOULAM,Fatiha BARIGOU,Ghalem BELALEM 7 3 2000 https://www.dline.info/ijis/fulltext/v17n3/ijisv7n3_1.pdf Information Extraction (IE) is a subfield of Natural Language Processing, valuable in many applications like Question Answering and Summarization. The information extraction aims to analyze texts written in natural language to extract useful information such as named entities and semantic relation between them. Several domains were affected by bioinformatics, Customer Care, Community Websites, Personal information management and so on. This paper focuses only on Information Extraction in the medical domain.