List of RMS Report "FieldNames"

I'm wondering if there is a list of all the different "FieldName"s for creating Custom Reports and/or adding additional filters to existing reports?

Specifically, we're looking for a list of Item attributes to filter by.

For example, HQ does not have a filter in any of it's report for whether an item is a Web Item or not so I added:

Begin Column
   FieldName = "Item.WebItem"
   DrillDownFieldName = ""
   DrillDownReportName = ""
   Title = "Web Item"
   VBDataType = vbBoolean
   Formula = ""
   ColHidden = True
   ColNotDisplayable = False
   FilterDisabled = False
   ColWidth = 1000
   GroupMethod = groupmethodNone
   ColFormat = ""
   ColAlignment = flexAlignLeftCenter
End Column

to one of our reports

Sometimes, it takes a lot of trial and error to come up with the right naming (item.WebItem) and I'm thinking a lot of you guys would just have a list including the different options

We've got the customization guide and it's been a great resource to learn the thought behind this stuff but it's incomplete.

Thanks,
Devon