Files with an XHTML extension which are not HTML documents (don't have any doctype) seem to be treated by JBDS as HTML files, not as XML files, despite being valid and correctly referencing namespaces.

Specifically, this appears to happen when the root element uses the default namespace. It doesn't happen when the namespace of the root element is named.

• The file src/main/webapp/table.xhtml triggers a lot of HTML problems, has root element in default namespace:

  <document xmlns:ui="http://java.sun.com/jsf/facelets" 
            xmlns:f="http://java.sun.com/jsf/core"
            xmlns="http://jboss.org/schema/seam/pdf">
  
      <image alignment="right" wrap="true" value="/jboss.jpg" /> 
      <font size="24"><paragraph spacingAfter="50">Table Test</paragraph></font>  
  ...
  </document>
  

  Unknown tag (document).
  table.xhtml
  /itext-web/src/main/webapp
  line 1
  HTML Problem
  

• src/main/webapp/whyseam.xhtml doesn't trigger HTML problems, has root element in a named namespace:

  <p:document xmlns:ui="http://java.sun.com/jsf/facelets"
              xmlns:f="http://java.sun.com/jsf/core"
              xmlns:p="http://jboss.org/schema/seam/pdf"
              title="Why Seam"
              keywords="mykeyword"
              subject="seam"
              author="Seam Team"
              creator="Seam PDF example app">
  
      <f:facet name="header">
          <p:font size="12">
              <p:footer borderWidthTop="1" borderColorTop="blue" borderWidthBottom="0" alignment="center">Why Seam? [<p:pageNumber />]</p:footer>
          </p:font>
      </f:facet>
  ... 
  </p:document>