From the publisher website or publicity

Enables architects and designers to produce language-independent Unified Modeling Language (UML) models of software architecture, business needs, reusable assets and management-level communication.

 * Single design experience.
 * Model-driven development with UML support.
 * Multiple model support for Model-Driven Architecture (MDA).
 * Runs either stand-alone or integrated with Microsoft Visual Studio .NET.
 * Create platform-independent architectures that can be implemented on Java and .NET platforms.
 * User definable patterns to create, customize and leverage architectural design patterns.
 * Cross-model references and versioning down to the class and diagram level allow structuring to fit any project.
 * Maintain traceability between analysis, design and implementation models.
 * Free-form modeling.
 * Web publishing and reporting

Keywords
.NET platform
analysis model
business needs
design model
implementation model
Java platform
MDA
Microsoft Visual Studio .NET
model driven
model-driven architecture
reusable assests
single design
software architects
UML
UML models
UML support
Unified Modeling Language
Visual Studio

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Vendor: IBM Rational