[GeoNetwork-devel] Metadata Schema Definition help

Hello, im writing on behalf of a working group of students from Computer Science of the Universidad del Valle de Guatemala. We are currently developing a clearinghouse node for the course Electronic Information Management. For this reason, we want to use the GeoNetwork software. As part of this process we need to define a metadata scheme to represent the metadata standard we use in the GIS department. Where can i get information on how to create and implement a new scheme of metadata?

Regards