From user requirements to UML class diagram
  The transition from user requirements to UML diagrams is a difficult task for the designer especially when he handles large texts expressing these needs. Modeling class Diagram must be performed frequently, even during the development of a simple application. This paper proposes an approach to facilitate class diagram extraction from textual requirements using NLP techniques and domain ontology. 
Hatem Herchi and Wahiba Ben Abdessalem
cs.SE