What is the default value of 'scope' attribute in JSTL tags?

Question

It is not defined in docs neither for <fmt:message> nor for <c:url> tags.

Answer 1

From JSTL specification (emphasis mine):

2.2.1 var and scope

...

The scope attribute has the semantics defined in the JSP specification, and takes the same values as the ones allowed in the <jsp:useBean> action; i.e. page, request, session, application. If no value is specified for scope, page scope is the default unless otherwise specified.

...

In other words, the default is page, i.e. the current JSP page.

The same applies to <c:set>, by the way.