return Dependency.CONTEXT_SET + Dependency.GLOBAL_VARS;
return Dependency.CONTEXT_SET + Dependency.GLOBAL_VARS+ Dependency.CONTEXT_ITEM;
	public int getDependencies(XQueryContext context) {		if(context.getCurrentStackSize() > positionInStack)			return Dependency.CONTEXT_SET + Dependency.GLOBAL_VARS;		else			return Dependency.CONTEXT_SET + Dependency.LOCAL_VARS;	}