[xwiki-users] Properties "List of users" and "DB list" (and "DB Tree")

Hi! I'm trying to list the users' name in a form, but the name have complement (p.e. Name: Carlos Eduardo da Silva / HR - manager). As in a "List of users" property, I want to display, when someone is selecting a name, the full name and complement, but when displaying in the results I want it to show the user's Alias. So what I did was a class (XWiki.dbClass) with two properties: Name (String) (p.e. Carlos Eduardo da Silva / HR - manager) Alias (String) (p.e.Carlos) Which I used as a DataBase to the property "Name" in the other class (XWiki.formClass). So, I chose for this property: XWiki Class Name: XWiki.dbClass Id Field Name: Name Value Field Name: Alias But the result was not as in a "List of Users" property, in which when one choose for example "Carlos Eduardo da Silva" the result in the table is "Carlos". The result was that both, selected and diplayed information, are in this example "Carlos". And another thing... I didn't understand the DB Tree property. One thing that worked was: XWiki Class Name: XWiki.dbClass Id Field Name: doc.fullName Value Field Name: Alias Parent Field Name: doc.parent But I don't understand the meaning of that... Can anyone help me ? -- Atenciosamente, Erica Usui.