1.0 1.2 scriptfree http://jakarta.apache.org/taglibs/standard/scriptfree Validates JSP pages to prohibit use of scripting elements. javax.servlet.jsp.jstl.tlv.ScriptFreeTLV allowDeclarations false Controls whether or not declarations are considered valid. allowScriptlets false Controls whether or not scriptlets are considered valid. allowExpressions false Controls whether or not top-level expressions are considered valid. allowRTExpressions true Controls whether or not expressions used to supply request-time attribute values are considered valid. Validates prohibitions against scripting elements. noop javax.servlet.jsp.tagext.TagSupport empty Does nothing.