[R] list with element "Class 'Date' num"

[Tintin]

Hi

How do I create an element with specificiation " Class 'Date' num "

The problem arises when I try to construct my own data structure set in the 
"termstrc" package. The model list should look like:

R> str(govbonds$GERMANY)
List of 8
$ ISIN
: chr [1:52] "DE0001141414" "DE0001137131" "DE0001141422" ...
$ MATURITYDATE:Class ' Date ' num [1:52] 13924 13952 13980 14043 ...
$ ISSUEDATE
:Class ' Date ' num [1:52] 11913 13215 12153 13298 ...
$ COUPONRATE : num [1:52] 0.0425 0.03 0.03 0.0325 ...
$ PRICE
: num [1:52] 100 99.9 99.8 99.8 ...
$ ACCRUED
: num [1:52] 4.09 2.66 2.43 2.07 ...
$ CASHFLOWS
:List of 3
..$ ISIN: chr [1:384] "DE0001141414" "DE0001137131" "DE0001141422" ...
..$ CF : num [1:384] 104 103 103 103 ...
..$ DATE:Class ' Date ' num [1:384] 13924 13952 13980 14043 ...
$ TODAY
:Class ' Date ' num 13908

I am trying to create my own basis data.I can create list elements of the 
type "Date", but not of type " Class 'Date' num ".

This seems to block further methods of this package to work properly.

Can someone help?

Thanks,

Tintin