doubt in insertion syntax

[sharravananap]

INSERT #Orders (OrderID, CustomerID, EmployeeID, OrderDate)
SELECT OrderID, CustomerID, EmployeeID, OrderDate
FROM
OPENXML(@iTree, 'Order', 1)
WITH ( OrderID INTEGER,
EmployeeID INTEGER,
OrderDate DATETIME,
CustomerID nCHAR(5))

-- Insert Order Details Record
INSERT #OrderDetails
SELECT * FROM
OPENXML(@iTree, 'Order/Items/Item', 1)
WITH ( OrderID INTEGER '../../@OrderID',
ProductID INTEGER,
Qty INTEGER,
UnitPrice MONEY,
Discount REAL 'Discount')

in the above syntax for inserting xml data into sql table, in the fourth line syntax OPENXML(@iTree, 'Order', 1)

here in the above why 'Order' is placed there, i dont know for what purpose it is placed, please clarify this as soon as possible

[jkmyoung]

The OPENXML function accepts three arguments, the first two of which are required. ....
The second argument is an XPATH (XML Path Language) pattern used to identify the nodes in the XML document.

From:

http://www.sql-server-performance.com/articles/per/openxml_minimise_database_calls_p2.aspx

http://www.google.ca/search?hl=en&q=OPENXML+SQL&meta=

So basically, you're pointing to the Order nodes.