xml/xsl validation errors

I have recently installed version 14.1 (trying to move from Eclipse), and there's a lot of issues with XML/XSL files I use.

Example 1 (XSL-FO template)




Example 2 (Tapestry .tml file)

• fo: namespace is not recognized and reports an error
• custom namespace declaration is ignored and reports an error
• custom attribute namespace reports an error

etc etc etc

The amount of XML/XSL files in this project is huge, so I simply won't be able to switch to IntelliJ if I can't resolve those "errors" (which are in fact not errors at all).

Could you advise? Many thanks.