# Eclipse 3.6 Plug-in Migration FAQ

1. Why aren't provisioning related services available in my application?
2. How do I migrate from the provisional p2 API in 3.5 to the new p2 API in 3.6?

## Why aren't provisioning related services available in my application?

OSGi services provided by p2 and Update Manager are now registered using the OSGi declarative services mechanism. If you are writing your own application that makes use of these services, you need to make sure the declarative services bundle (`org.eclipse.equinox.ds`), is being started in your application.

## How do I migrate from the provisional p2 API in 3.5 to the new p2 API in 3.6?

In the 3.4 and 3.5 releases, p2 provided a provisional API for accessing its functionality programmatically. This provisional API has largely been replaced in the 3.6 release with a fully supported mature p2 API. While there is generally no migration support for clients who used provisional APIs, you can find some help with migration on the p2 Helios Migration Guide.