XPath TutorialLesson 51Free preview
XPath Examples
This lesson is part of XML · All levels
Summary
A practical example of XPath shows how the expression selects real data: take the most expensive book title, filter by attribute, count the number of items, to pick the first element. The pattern is always the same: determine the starting point, determine the axis or path, and then add the predicate if you need to filter.
Key points
- Common examples select elements based on attributes and positions
- Predicate allows filters based on values and positions
- The functions count() and sum() process the set of nodes
- The absolute or relative starting point determines the selection coverage
- XPath is used across languages to process XML
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