On 17/09/2008, at 5:48 AM, Frank Mittelbach wrote: > \tlp_set:Nn\l_quark_test_tlp{#1} > \if_meaning:NN \l_quark_test_tlp #1 ... > > assuming that #1 has picked up a token which may or may not be a quark > > is that what you are looking for? Ha, so simple. Thanks. And if it's *not* a quark, you're still not going to want to expand it (fully)! Will