IntelliJ IDEA features excellent support for XML development. Smart editor with code completion, error highlighting and other productivity aimed features help create efficient code. However, there is no limit in perfecting the development environment.
XPathView plugin extends IntelliJ IDEA XML and XSL support by providing for:
Instant XPath evaluation
Get the fully qualified XPath expression that identifies certain XML document node. Use it in your application to refer to that node, or create an XSL base stylesheet.
The plugin also lets you evaluate XPath queries and examine what results
XPathView Plugin: Boosting XSL and XML Development
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