The IsAttribute(expr) command checks that its argument is an XML attribute data structure.

$\mathrm{with}\left(\mathrm{XMLTools}\right)\:$

$\mathrm{IsAttribute}\left(\mathrm{XMLAttribute}\left(''foo''\,''bar''\right)\right)$

$\mathrm{true}$

$\mathrm{IsAttribute}\left(\mathrm{XMLEntity}\left(''oplus''\right)\right)$

$\mathrm{false}$

$\mathrm{IsAttribute}\left(\mathrm{XMLElement}\left(''cn''\,\left[\right]\,''2.3''\right)\right)$

$\mathrm{false}$