evalEnclosedExpr(((Expression)next).eval(docs, contextSequence, contextItem), buf);
evalEnclosedExpr(((Expression)next).eval(contextSequence, contextItem), buf);
	public Sequence eval(		DocumentSet docs,		Sequence contextSequence,		Item contextItem)		throws XPathException {		StringBuffer buf = new StringBuffer();		Object next;		for(Iterator i = contents.iterator(); i.hasNext(); ) {			next = i.next();			if(next instanceof Expression)				evalEnclosedExpr(((Expression)next).eval(docs, contextSequence, contextItem), buf);			else				buf.append(next);		}		return new StringValue(buf.toString());	}