XPath Expressions
The XPath language is capable of building sophisticated expressions that aren't always completely obvious. This section provides some examples of the more esoteric XPath expressions.
/guitars/guitar[model] Identifies all guitar element nodes (under the root guitars element node) that have a child model element node. //guitar[@type and @topic] Identifies all guitar element nodes anywhere in the document that have both a type and topic attribute node. guitar[(sum(*/rating) div count(*/rating)) > 4.0] This expression identifies all guitar element nodes that are children of the context node and that have a rating average (average value of rating grandchildren element nodes) greater then 4.0. //guitar[/featured-model = model[1]] ... |
Get Essential XML: Beyond Markup now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
