helios 的 uml2 工具要从macket place下载

helios 的 uml2 工具要从macket place下载，eclipse网站的还不支持3.6

符上官方FAQ，跟着以下步骤让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.