Added the following to an XML file...
<?xml version="1.0" encoding="UTF-8" ?>
I expected Intellij to resolve the mule.xsd file and enable code completion and error checking. Unfortunately, it did not unless I saved the XSD to a local file and registered the URI in the Resources. I was sort of hoping IDEA would handle that automatically when the XSD is public and accessible over http. Mule has a lot of schemas and I'd prefer to have Intellij register them automatically. Is it necessary to map the URI to a local XSD file even when the XSD is available over http?