Does XmlStore retain retrieved data?

Question

I'm using dojox.data.XmlStore and noticed that it issues an HTTP request every time I try to do an operation on it. I took a look at the code and sure enough it executes dojo.xhrGet all the time.

Is there a way to get my hands on the returned data, or even better, have XmlStore cache the data so it doesn't have to hit the back end server every time? I'm thinking of extending XmlStore to do this, but wanted to check before I invest my time.

Thanks. Carl.