helios 的 uml2 工具要從macket place下載，eclipse網站的還不支持3.6
符上官方FAQ，跟着以下步驟讓eclipse 3.6支持uml2 tools
How do I workaround org.eclipse.emf.ocl deprecation in Helios and later?
The deprecated org.eclipse.emf.ocl feature and plugin were removed in the MDT/OCL 3.0.0 release. Unfortunately some projects, notably UML2-Tools, continue to reference it. This prevents their Galileo releases being installed on Helios. A Helios release of UML-Tools has been built (26-July-2010) but its visibility from The UML2-Tools Downloads Page is not quite right yet.
[Attachment] to [Bug 318941] provides a ZIPped update site containing just enough of org.eclipse.emf.ocl to satisfy the installation requirements of org.eclipse.emf.ocl dependents.
Therefore to install e.g. UML2-Tools
- Install MDT/OCL 3.0.0 (most conveniently as part of the Eclipse Modeling Package)
- Download org.eclipse.emf.ocl-update.zip from the [Attachment]
- Install New Software from the downloaded org.eclipse.emf.ocl-update.zip
- Download e.g. mdt-uml2tools-Update-incubation-0.9.0.zip from [UML2-Tools Downloads]
- Install New Software from the downloaded mdt-uml2tools-Update zip
Do not install anything else after UML2-Tools since org.eclipse.emf.ocl-update.zip effectively claims that Galileo and Helios are compatible undermining p2's ability to install consistent plugins.