openlayers/ol3 — pull request #2129 by fredj (2014-05-27 15:26:22+00:00)
Title: Add feature id prefix in ol.format.OSMXML

Avoids to have the same id in the parsed features.
"Node ids are unique between nodes. However, a way or a relation can
have the same id number as a node." (from http://wiki.openstreetmap.org/wiki/Node)