It is a very tiny meta-model including everything needed for modeling the contents of every XML doc.
Figure 1 - XML meta-model
Figure 2 - XML.ecore
EMF provides in meta-model format the meta-schema specification that rules the construction of W3C-Schemas.
Figure 3 - Kernel of the XSD meta-model
EMF provides the Mapping.ecore meta-model, appropriate for the formulation of a generic set of correspondences as a model compliant to it.
Figure 4 - Kernel of the Mapping meta-model
Figure 5 - Mapping.ecore
Figure 6 - Injection and extraction HOTs
Figure 7 - Kernel of the XSD model corresponding to the MAST-2 W3C-Schema
Figure 8 - Mast2_Model.xsd.xmi
Figure 8 - Kernel of the mappings model for MAST-2
Figure 9 - Mast2-Mast2_Model.map.xmi