What is the best way to read XMP\metadata from rendered file?

I'm trying to read marker data from a QT file that I rendered, I want to locate a specific marker data and other software that I'm developing needs to read this marker data, One problem that I have is that the XMP data that comes out of the file is pretty big aprox 50mb that contain all the project data inculeding layers and files names and type. 

The other problem is that all this data is messy and it is very hard to parse it. 

Do oyu know a way that I can set in After Effects to only export marker data in XMP and don't export all the other data?