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