<!-- ISO and MathML DTDs and entities -->
<!--Added Math Symbols: Arrows-->
<!ENTITY % isoamsae.dtd SYSTEM "isoamsae.dtd">
<!--Added Math Symbols: Binary Operators-->
<!ENTITY % isoamsbe.dtd SYSTEM "isoamsbe.dtd">
<!--Added Math Symbols: Delimiters-->
<!ENTITY % isoamsce.dtd SYSTEM "isoamsce.dtd">
<!--Added Math Symbols: Negated Relations-->
<!ENTITY % isoamsne.dtd SYSTEM "isoamsne.dtd">
<!--Added Math Symbols: Ordinary-->
<!ENTITY % isoamsoe.dtd SYSTEM "isoamsoe.dtd">
<!--Added Math Symbols: Relations-->
<!ENTITY % isoamsre.dtd SYSTEM "isoamsre.dtd">
<!--General Technical-->
<!ENTITY % isoteche.dtd SYSTEM "isoteche.dtd">
<!--Numbers and Currency symbols-->
<!ENTITY % isonume.dtd SYSTEM "isonume.dtd">
<!--MathML Aliases (From ISO PUB,DIA,NUM)-->
<!ENTITY % mmaliase.dtd SYSTEM "mmaliase.dtd">
<!--Greek Symbols-->
<!ENTITY % isogrk3e.dtd SYSTEM "isogrk3e.dtd">
<!--Math Script Font-->
<!ENTITY % isomscre.dtd SYSTEM "isomscre.dtd">
<!--Math Open Face Font-->
<!ENTITY % isomopfe.dtd SYSTEM "isomopfe.dtd">
<!--MathML Entities-->
<!ENTITY % mmlent.dtd SYSTEM "mmlent.dtd">
<!--Main MathML DTD -->
<!ENTITY % mathml.dtd SYSTEM "mathml.dtd">