How can I modify the conditions for which MyEclipse will throw up warning flags? I'd be happy to hear a generic solution, but here is my specific problem for the curious/if it turns out to be relevant:
<html xmlns="http://www.w3.org/1999/xhtml">
<wicket:panel>
<p>
<object type="text/html" width="750" height="360" wicket:id="htmlRendition"></object>
</wicket:panel>
</html>
causes warnings "Undefined attribute name (xmlns)," "Unknown tag (wicket:panel)" and "Undefined attribute name (wicket:id)." Oddly, there are no errors for most HTML files paired with Wicket Java files, only files with the format ClassName$InnerClassName.html.
In the project properties, you can turn off different types of validation. For example, you can say that you don't want DTD validation of XML files, or HTML validation, etc.
Myeclipse example is here.