The markdown help states
Available conditionals are
gt,gte,lt,lte,eq, andneq.
<!-- if version [eq C++03] -->
eqequal to<!-- end version if -->
<!-- if version [neq C++03] -->
neqnot equal to<!-- end version if -->
<!-- if version [gt C++03] -->
gtgreater than<!-- end version if -->
<!-- if version [gte C++03] -->
gtegreater than equal<!-- end version if -->
<!-- if version [lt C++03] -->
ltless than<!-- end version if -->
<!-- if version [lte C++03] -->
lteless than equal<!-- end version if -->