How to find the max attribute from an XML document using Xpath 1.0

Question

Is there a way to query an XML document to return the maximum of a given attribute using Xpath 1.0 ?

For example is there a way to get the max id ?

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Answer 1

This example can be used to find the max.

XmlDocument doc = new XmlDocument();                    
doc.Load("../../Employees.xml");
XmlNode node = doc.SelectSingleNode("//Employees/Employee/@Id[not(. <=../preceding-sibling::Employee/@id) and not(. <=../following-sibling::Employee/@Id)]");
int maxId = Convert.ToInt32(node.Value);

For other similar topics on xpath and linq check out http://rmanimaran.wordpress.com/2011/03/20/xml-find-max-and-min-value-in-a-attribute-using-xpath-and-linq/