protected override string BuildStringSTEP()
{
if (mElements.Count == 0)
return "";
string str = base.BuildStringSTEP() + ",(" + ParserSTEP.LinkToString(mElements[0]);
for (int icounter = 1; icounter < mElements.Count; icounter++)
str += "," + ParserSTEP.LinkToString(mElements[icounter]);
return str + ")";
}