XPath to get the maximum ID

Question

XML Source:

    
        School A
        
            Student A

        

Answer 1

Just for completeness... If you could had XPath 2.0 available, you could use max(), as in:

/*/school[*/id = max(//id)]/name

It's a little easier than in XPath 1.0.

However AFAIK you do not have XPath 2.0 available in Python. So go with @cdhowie's or @Alejandro's answer.

Answer 2

What about:

//student[not(../../school/student/id > id)]

Or, more simply:

//student[not(//student/id > id)]

To get the <school/> element with the highest student ID, I believe this will work:

//school[student[not(//student/id > id)]]

Answer 3

Use:

/schools/school[student[not(../../school/student/id > id)]]/name

Or shorter (just for this schema):

/*/school[*/id[not(//id > .)]]/name