Attributes independent of any hierarchy in Schema Workbench

Hi, I am using Pentaho Enterprise Editions 4.8.

I have a dimension names 'Hospital'. There is field called HospitalName. There are three more fields named hospitalSystem, HospitalRegion, HospitalSize that have one to many relationship with HospitalName. However, there is no such relationship among the three attributes.

When I put all the four attributes in Schema Workbench, I am forced to use hierarchies. But I can't put the four fields in one hierarchy. So now I am forced to use three hierearchies like this

Hierarchy 1. HospitalSize --> HospitalName
Hierarchy 2. HospitalSystem --> HospitalName
Hierarchy 3. HospitalRegiona --> HospitalName

However, what I really want is a dimension in my schema workbench like this:

Dimension - Hospital
Attributes - HospitalName, HospitalSize, HospitalSystem, HospitalRegion
Hierarchies -
Hierarchy 1. HospitalSize --> HospitalName
Hierarchy 2. HospitalSystem --> HospitalName
Hierarchy 3. HospitalRegiona --> HospitalName

So basically I want to be able to use Hospital attributes without having them to be part of any hierarchy. Is this possible in version 4.8?
I read somewhere that it's possible in the version 5.0 but I am not sure. Can you guys help me with this please? Thanks,

ap