jQuery Forum

http://view.jquerymobile.com/1.2.1/docs/pages/page-navmodel.html

1.

$.ajaxPrefilter( function(options, originalOptions, jqXHR) { if ( applicationCache && applicationCache.status != applicationCache.UNCACHED && applicationCache.status != applicationCache.OBSOLETE ) { // the important bit options.isLocal = true; } 

});

this code above about  options.isLocal = true;

needed for phonegap app?

2.

The below instruction the  data-ajax="false" needed in all external local links along rel=external,...?

If you link to multipage document, you must use a data-ajax="false" attribute on the link to cause a full page refresh due to the limitation above where we only load the first page node in an Ajax request due to potential hash collisions. There is currently a subpage plugin that makes it possible to load in multi-page documents

3. 

Both these required or only first in other domain url load or in a phonegap app...?

rel=external

target (with any value, such as "_blank")

???