There is no XSD and it most probably cannot be provided as XWT is a "dynamic language", i.e. "specific data" is only available at runtime.
Though, we could provide a better integration for the WTP XML Editor to support context sensitive content assist.
Sharon Dagan wrote on Sun, 24 November 2013 21:02
Is there a xml scheme file that describes the xwt markup?
I'm an old cowboy and I like to edit my .xwt files using the built-in xml editor.
However, without a proper xsd file, ctrl+space can't provide completion suggestions.