// Add the layout constraints supplementary validator.
validator.addSupplementaryValidator(
MCSNamespace.LPDM.getURI(),
LayoutSchemaType.LAYOUT.getName(),
new LayoutConstraintsValidator());
// Add the layout duplicate name supplementary validator.
validator.addSupplementaryValidator(
MCSNamespace.LPDM.getURI(),
LayoutSchemaType.LAYOUT.getName(),