Does "cmis:write" contain "cmis:read"?

Hello,

I am writing a java client that uses Chemistry to talk to an Alfresco 5 Community server.

The client needs to get all principals that have the right to read a given cmis object. To get the ACL I use the following method call:

Acl acl = session.getAcl(cmisObject, true);

So I only get basic CMIS Permissions and the alfresco specific permissions get mapped to them, what makes things quite easy.

But I am wondering if the "cmis:write" permission contains the "cmis:read" permission in a alfreso repository.

The book "CMIS and Apache Chemistry in action" says on page 348:
In almost all repositories, the cmis:write permission contains the cmis:read permission.

What is it like in an alfresco repository?

Thanks,
Pascal