This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 112e. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
According to 7.2.1 [basic.lval] paragraph 1,
An xvalue is the result of certain kinds of expressions involving rvalue references (188.8.131.52 [dcl.ref]).
However, there are now expressions not involving rvalue references whose results are xvalues, e.g., a member access expression in which the left operand is a prvalue.
Rationale (November, 2014):
The cited wording does not preclude other kinds of expressions that result in xvalues. This wording could be expanded editorially if a more extensive coverage is desired.