Permalink
PL stands for permalink; symbol 
. A PL is an URL like this one referring to two streets in Antwerp:
https://www.waze.com/editor?env=row&lon=4.41241&lat=51.22180&zoom=5&segments=88565023,358431133
- The first parameter specifies the environment where row stands for rest of the world.
- Next attribute specify the geographic coordinates to the position of a point on the Earth's surface via the longtitude and latitude
- Third attribute is the zoom level
- Fourth optional attribute are referring to selected segments.