如何在Eclipse中为.xsd和相关文件禁用XML编辑器？

I want to be able to double-click on an .xsd and have Eclipse open it in a text editor, but if I add a ".xsd" file association it shows up with the XML Editor as the first editor in the list and it says "(locked by 'XML (Illformed)' content type) (locked by 'XSD' content type)" etc., and under the Content Types panel the section for XML is all locked. Eclipse is parsing my XML files all wrong and it just doesn't make sense to use the structured editor. How do I disable it?I want to be able to double-click on an .xsd an