"cloudscape" and "apache Derby" together

Hi.

I am following a book to learn about using web services and it has used "IBM CloudScape"

but on the IBM web site, they say that they do not develop Cloudscape any more and there is something named as "Derby" under Apache projects ..

so :

1) Is it the same Cloudscape ? so i can use it and continue with my book that uses Cloudscape for its examples, but install the new one that is Derby?

2) Can I have both IBM Cloudscape and Apache Derby ? (or just one of them should be installed)

Thank you in advance.

Cloudscape was donated to Apache and renamed to Derby. To make things more confusing, Sun Java DB is Apache Derby renamed again. I�d just use the latest version of Derby.