In PersistenceMapping - how things are represented in a database - AutoGuid represents an dbgenerated Guid value.

As you state that you are new to MDriven you will probably not be interested in overriding persistence mapping just yet -> forget about AutoGuid for now.

Common types for attributes are the simple native types:

-String (size limited in db)

- Text (Text in db - no size limit)

- Double

- Decimal

- Integer

- DateTime

- Boolean

- Blob (Binary data byte[] -combine with setting for BlobType) Guid