Updating Xml attributes with new values in a SQL Server 2008 table

[doi4h]

I have a table in SQL Server 2008 that it has some columns. One of these columns is in Xml formatand I want to update some attributes.For example my Xml column's name is \[code\]XmlText\[/code\] and it's value in 5 first rows is such as:\[code\] <Identification Name="John" Family="Brown" Age="30" /> <Identification Name="Smith" Family="Johnson" Age="35" /> <Identification Name="Jessy" Family="Albert" Age="60" /> <Identification Name="Mike" Family="Brown" Age="23" /> <Identification Name="Sarah" Family="Johnson" Age="30" />\[/code\]and I want to change all \[code\]Age\[/code\] attributes that are 30 to 40 such as below:\[code\] <Identification Name="John" Family="Brown" Age="40" /> <Identification Name="Smith" Family="Johnson" Age="35" /> <Identification Name="Jessy" Family="Albert" Age="60" /> <Identification Name="Mike" Family="Brown" Age="23" /> <Identification Name="Sarah" Family="Johnson" Age="40" />\[/code\]