// requires at least SPIP 2.0
<necessite id="SPIP" version="[2.0;)" />
// requires SPIP < 2.0
<necessite id="SPIP" version="[;2.0)" />
// requires SPIP >= 2.0, and <= 2.1
<necessite id="SPIP" version="[2.0;2.1]" />
 
// requires spip_bonux at least at version 1.2
<necessite id="spip_bonux" version="[1.2;]" />