CI1.6: Extending a usermodel from another usermodel possible?

[eluser]WolfgangA[/eluser]
Hello,

using CI1.6, is it possible to extend a user-base model from the ci core model, and then extend from that user base model (using php4 /php5)?

Something like:

Code:

Basemodel extends Model

Code:

MydataModel extends Basemodel

[eluser]tonanbarbarian[/eluser]
Extending Native Libraries