<div>Hi,</div>
<div><br clear="all">I've been recently reading an article about OCL where the authour states he sees no major dificulties for adopting OCL as notation for specifying the <i>activation condition</i> that triggers the
<i>action part</i> of a reactive rule.</div>
<div> </div>
<div>I wonder than why rule engines use proprietary rule languages and not smth standardized like OCL?<br> </div>