Can I use the schema to run different versions?
If the same schema is being used, it can only run on one version. For example, if the 'Spotlight' schema is on version 7.6, the client application GUI also needs to be on version 7.6. On the other hand, if the client version has been upgraded and the schema has not, you will be prompted to upgrade the scheama objects.
If you wish to run multiple versions, then you can create mulitiple schemas for each version to be installed under.