webappAttr.put("xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance");
webappAttr.put("xsi:schemaLocation","http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd");
webappAttr.put("metadata-complete","true");
webappAttr.put("version","3.1");
out.openTag("web-app",webappAttr);
if (_webApp.getDisplayName() != null)
out.tag("display-name",_webApp.getDisplayName());
// Set some special context parameters