XML Schema Validator
This tool will help you with writing EWP XML documents. For example, you can paste the contents of your Manifest file here before you upload it onto your production site. You should be able to validate any XML document described in all RELEASED, DEPRECATED and OBSOLETE specifications listed on Developers Hub website (plus, perhaps, some of the DRAFT ones).
Note, that this tool will validate against the schema only! Even if such validation succeeds,
your file may still be invalid (if, for example, you didn't adhere to the guidelines described in
<xs:documentation> elements included in the XSD files).
FailedThis seems to be a valid