convertToSvgId = function(sAppVarId, sTerminologyId) {
		return "terminology-" + sAppVarId + (sTerminologyId ? "-" + sTerminologyId.substring("terminology".length + 1) : "");
	}
@param {string} sAppVarId app variant id, e.g. "appvar1"
@param {string} sTerminologyId terminology id, e.g. "terminology2"
@returns {string} the id of the box in the svg image, e.g. "terminology-appvar1-2"