Updating Database Through XML

Hi. I'm new to XML and have a basic question. Below is a file "ItemList.xml" which is used to update a database for displaying some data-entry fields on a form. Let's say that currently it has three elements (ItemId="108120", ItemId="139371", and ItemId="108155" as shown below). Now, suppose I would like to add a couple more elements to it, what is the normal way of doing that? Do I update the XML by manually typing in a couple more tags for the 2 additional elements, or is it normally done programmatically? I will be using ASP for coding. Any help on this - OR referral to helpful postings or resources would be appreciated. Thanks

- <ROOT>
<ITEM ItemId="108120" ItemNo="MS-ADDACCTS" ItemDescr="ADDITIONAL ACCOUNTS & SERVICES" ItemCat="ACCTAPPPACKET" ChangedDt="Sep 21 2005 4:20PM" />
<ITEM ItemId="139371" ItemNo="MS-FID" ItemDescr="FIDUCIARY ACCOUNT APPLICATION PACKET" ItemRev="11-04" ItemCat="ACCTAPPPACKET" ChangedDt="Sep 30 2005 12:39PM" />
<ITEM ItemId="108155" ItemNo="LO-PACKET" ItemDescr="LOANS-CREDIT APPLICATION PACKET" ItemRev="10-02" ItemCat="ACCTAPPPACKET" ChangedDt="Sep 30 2005 2:41PM" />
</ROOT>