[PW] Spatial Location File (SLF) - ERROR Opening Spatial Location File

What is the specification of SLF XML files? Is there a xsd available for validation? Does it support relative/full path for documents?

This custom generated SLF file doesn't work for me gives ERROR,Opening Spatial Location File.

<?xml version="1.0"?>
<Slf version="1.0">
<Pairs>
<Pair>
<ObjectName type="Document">ABC.dgn</ObjectName>
<Geometry type="polygon">
<Coords type="2d">
<Coord>
<X>501747</X><Y>312692</Y>
</Coord>
<Coord>
<X>501902</X><Y>312692</Y>
</Coord>
<Coord>
<X>501902</X><Y>312502</Y>
</Coord>
<Coord>
<X>501747</X><Y>312502</Y>
</Coord>
<Coord>
<X>501747</X><Y>312692</Y>
</Coord>
</Coords>
</Geometry>
</Pair>
<Pair>
<ObjectName type="Document">ĀBČ.dgn</ObjectName>
<Geometry type="polygon">
<Coords type="2d">
<Coord>
<X>511068</X><Y>312788</Y>
</Coord>
<Coord>
<X>511261</X><Y>312788</Y>
</Coord>
<Coord>
<X>511261</X><Y>312512</Y>
</Coord>
<Coord>
<X>511068</X><Y>312512</Y>
</Coord>
<Coord>
<X>511068</X><Y>312788</Y>
</Coord>
</Coords>
</Geometry>
</Pair>
</Pairs>
</Slf>