Validating xml editor
Xerces is widely considered the best open-source XML parser and is used in many enterprise servers.
The Oxygen Validation Scenarios are very powerful and solve numerous important issues when working with XML markup and XML-related technologies.
When you work with modules, it is also common to re-use them in various contexts (master files).
Suppose that you are working with a large XML document that you decide to split into multiple files and use external entities to merge those files into a master document.
If you edit one of those files then you would want to check that the master document is valid.
At the bottom of the editing area, a message is displayed that describes the error that is closest to the cursor position.
The location of errors, including those that are generated by continuous validation, are marked in-place with an underline.