Fields expressions vs ReportItem

[Steffen]

When using ObjectDatasources, it makes sense, not to work with values of properties/fields,
but to get the owner/parent of the property.

1. So you have the type information of the owner and the type information of each property.
2. You can convert data, and format data, and localize data by their type information...

Inside DataSource binded table...

=MyFunction(Fields.MyPpropertyName)  //  --  works fine

=MyFunction(ReportItem.DataObject.RawData , "MyPpropertyName")  //  --   works fine

=MyFunction(Fields, "MyPpropertyName")   //--  does not work - why is it not a valid expression?

Or is there another better shortcut to get the "Fields object" itself, i should use?

thank you
Steffen

[Hadib Ahmabi]

I believe that Fields is some kind of helper and not the actual data-object because you can skip the Fields
for e.g. "= YourFieldname" is equal to "= Fields.YourFieldName" (just to be clear that it is a Field). 
Also what is the point in calling 
=MyFunction(Fields, "MyPpropertyName") 
when you can just say
=MyFunction(Fields.MyPpropertyName) 
or
=MyFunction(Fields("MyPpropertyName"))