Idea should know about all JavaBean properties of seam components. Specifically it fails to resolve the org.jboss.seam.web.ContextFilter.regexUrlPattern (defined in super class AbstractFilter) - see screenshot. If I control click on the "web:context-filter" part in my components.xml then Idea takes me to seam-support.jar!\resources\schemas\web-2.0.xsd Isn't it feasible to make Idea understand and process Seam's @Namespace annotation? Hardcoding the xsd's seems quite fragile and error-prone to me. Also Idea should "Go to declaration" to the Seam component rather than to Idea's own internals schema.