Notation declarations are made with XSC:Notation elements nested in the XSC:XSchema element. .
<!ELEMENT XSC:Notation (XSC:Doc?, XSC:More?) >
Name NMTOKEN #REQUIRED
id ID #IMPLIED
PubidLiteral CDATA #IMPLIED
SystemLiteral CDATA #IMPLIED>
Notations may include Public Identifier or a system literal, or both. XSchema processors should ignore XSC:Notation elements that contain neither. Public Identifiers and system literals should conform to the rules in Section 4.7 of the XML 1.0 Specification.