What populates the OptimizeRaster ExcludeFilter

[Warwick]

I created a template file with nothing in the ExcludeFilter tag 

but in the log message is below

The raster format filter is the same as the template but the exclude filter is different. Where is that coming from?

[AbhijitDoshi]

Warwick Sayers‌ if there is no exclude filter in that case it uses a default filter, in case you can use some dummy value xyz if you do not want to use default filters