%Schema.prefix;
Make Prefix Equal “xsi”
Establishes the “xsi” prefix to enable use of the W3C XSD Schema elements (part of the MathML DTD setup)
Model
<!ENTITY % Schema.prefix "xsi" >
<!ENTITY % Schema.prefix "xsi" >
Book Interchange Tag Suite (BITS) Version 2.0 Tag Library
Version of February 2016