Help to understand how a dae file with empty p element works (Maya can load it)

I´m making my own collada parser, and found something I have never seen before, so I don´t know how to interpret.

I´m exporting a model I have in FBX to collada Dae. My problem is that now, the only “p” xml element I found inside is empty and I don´t know to load the mesh without this tag.

The really funny thing is that Maya can import it without problems. Can anyone explain to me how to interpret a dae file with the empty p tag?


I thought it might be unindexed primitives. But, how data source is interpreted without indexes ? I´m asking this because the number of normal, positions and text coords differs in the accessor.