Non persistent child fields are not visible in Designer

Hi,

I am using XtraReports with an XPO data source.

I have the following class:

public class Media : XPBaseObject
{
[Key(AutoGenerate = true), Persistent("MediaID")]
public int ID;

...

[NonPersistent]
public Format Format
{
get
{
return _format;
}
set
{
SetPropertyValue("Format", ref _format, value);
}
}
private Format _format;

public Location Location
{
get { return _location; }
set
{
SetPropertyValue("Location", ref _location, value);
}
}
private Location _location;

Location is:

[OptimisticLocking(true)]
public class Location : XPBaseObject
{
// All properties:
[Key(AutoGenerate = true), Persistent("LocationID")]
public int ID;

[Persistent("ParentLocationRef")]
public Location ParentLocation;

[Size(20)]
public string Name;

[Size(80)]
public string Description;

The Format class is not persisted:

public class Format
{
public string Name { get; set; }
}

The properties of the child object of the persisted Location class are visible, the properties of the child of the NonPersistent class are not visible. (Format -> Name - See attached screenshot)

How can I make properties of simple (POCO) classes accessible in the Field list of the End User Report Designer?

(I found a couple of questions and answers regarding child collections but not a solution for child objects.)

Thanks!

Joern