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%ISOmfrk; Math Alphabets: Fraktur for MathML

External file containing ISO Standard Math Alphabets (Fraktur).
Declaration
<!ENTITY % ISOmfrk PUBLIC
"-//W3C//ENTITIES Math Alphabets: Fraktur for MathML 2.0//EN"
"iso9573-13/isomfrk.ent"                                             >