1. A method of reducing the size of a simpleType element in an Efficient XML Interchange (EXI) schema document, the method comprising: modifying each simpleType element in an XML Schema Definition (XSD) document by eliminating one or more validation-specific facets from each simpleType element; and encoding the XSD document into an EXI schema document by transforming each modified simpleType element in the XSD document from an XSD simpleType element with start and end tags to an encoded EXI simpleType element expressed as a sequence of bits, wherein each of the one or more validation-specific facets includes a facet employed to validate whether a document conforms to the XSD.
3. The method according to claim 1 , further comprising utilizing the encoded EXI schema document in a task of encoding an XML document into an EXI document.