Use this tag for questions related to dataScroller, a scroller for UIData components
Quoting Apache's page:
Scroller for UIData components eg. dataTable Must be nested inside footer facet of dataTable OR for attribute must be given so that corresponding uiData can be found. Unless otherwise specified, all attributes accept static values or EL expressions. A component which works together with a UIData component to allow a user to view a large list of data one "page" at a time, and navigate between pages.
datascroller is usually used along with the jsf, so think about whether you should use it or not.