rem: var oldN2 = this.ds.GetTarget (n1, a, true); if (!oldN2) { dd ("** Unable to change " + n1.Value + " -[" + a.Value + "]->, " + "because old value was not found."); return null; } 
add: var n1v = n1 ? n1.Value : "!!!"; var av = a ? a.Value : "!!!"; var n2v = n2 ? n2.Value : "!!!"; 
context: function rdf_duassert (n1, a, n2){    var oldN2 = this.ds.GetTarget (n1, a, true);    if (!oldN2)    {        dd ("** Unable to change " + n1.Value + " -[" + a.Value + "]->, " +            "because old value was not found.");        return null;    }        return this.ds.Change (n1, a, oldN2, n2);    }
meta: 3298	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3298/a8c889b5b927b282ce157d449072c1fdcf24b2cd/rdf.js/clean/xul/content/rdf.js