  The increasing complexity of software engineering requires effective methods
and tools to support requirements analysts' activities. While much of a
company's knowledge can be found in text repositories, current content
management systems have limited capabilities for structuring and interpreting
documents. In this context, we propose a tool for transforming text documents
describing users' requirements to an UML model. The presented tool uses Natural
Language Processing (NLP) and semantic rules to generate an UML class diagram.
The main contribution of our tool is to provide assistance to designers
facilitating the transition from a textual description of user requirements to
their UML diagrams based on GATE (General Architecture of Text) by formulating
necessary rules that generate new semantic annotations.
