<!--
   MathML Entitites PROVISIONAL
   David Carlisle
   Copyright 1998 Nag Ltd, The OpenMath Consortium. Esprit Project 24.969.
-->

<!-- Section 6.2.1 -->

<!ENTITY tab "&#9;"><!--   tabulator stop -->

<!ENTITY NewLine  "[NewLine]"><!--  force a line break -->

<!ENTITY IndentingNewLine "[IndentingNewLine]"><!--
          force a line break and indent appropriately on next line -->

<!ENTITY  NoBreak   "[NoBreak]"><!--
                          never break line here -->

<!ENTITY  GoodBreak   "[GoodBreak]"><!--
                         if a linebreak is needed, here is a good spot -->
<!ENTITY  BadBreak   "[BadBreak]"><!--
       if a linebreak is needed, try to avoid breaking here      -->

                          
<!ENTITY  Space  " "><!-- Space -->

<!ENTITY NonBreakingSpace "[NonBreakingSpace]"><!--
                          space that is not a legal breakpoint -->

<!ENTITY ZeroWidthSpace "[ZeroWidthSpace]"><!--
                          space of no width at all -->


<!ENTITY VeryThinSpace  "[VeryThinSpace]"><!--
              space of width 1/18 em      -->


<!ENTITY ThinSpace "[ThinSpace]"><!--
                  space of width 3/18 em   -->


<!ENTITY MediumSpace "[MediumSpace]"><!--
                 space of width 4/18 em    -->


<!ENTITY ThickSpace "[ThickSpace]"><!--
                 space of width 5/18 em   -->


<!ENTITY NegativeVeryThinSpace  "[NegativeVeryThinSpace]"><!--
                space of width -1/18 em    -->


<!ENTITY NegativeThinSpace "[NegativeThinSpace]"><!--
               space of width -3/18 em      -->


<!ENTITY NegativeMediumSpace "[NegativeMediumSpace]"><!--
               space of width -4/18 em     -->


<!ENTITY NegativeThickSpace "[NegativeThickSpace]"><!--
                  space of width -5/18 em   -->




<!ENTITY    InvisibleComma   ""><!-- 
             used as a separator, e.g., in indices (Section 3.2.4)   -->
<!ENTITY    ic   ""             ><!--
            short form of &InvisibleComma;  -->

<!ENTITY    InvisibleTimes   ""><!-- 
            marks multiplication when it is understood without a mark (Section 3.2.4 -->
<!ENTITY    it   ""><!--
            short form of &InvisibleTimes;   -->

<!ENTITY    ApplyFunction   ""  ><!--
            character showing function  application in presentation tagging (Section 3.2.4)  -->
<!ENTITY    af   ""            ><!-- 
            short form of &ApplyFunction; -->

                  
<!-- Section 6.2.3 -->

<!ENTITY    CapitalDifferentialD   "D"><!--
            D for use in differentials, e.g., within integrals  -->
<!ENTITY    DD   "D"             ><!--
            short form of &CapitalDifferentialD;  -->

<!ENTITY    DifferentialD   "d"><!--
            d for use in differentials, e.g., within integral  -->
<!ENTITY    dd   "d"             ><!--
            short form of &DifferentialD;  -->

<!ENTITY    ExponentialE   "e"><!--
            e for use for the exponential base of the natural logarithms   -->
<!ENTITY    ee   "e"             ><!--
            short form of &ExponentialE;  -->

<!ENTITY    false   "F"             ><!--
            logical constant false  -->

<!ENTITY    ImaginaryI   "i"><!--
            i for use as a square root of -1   -->
<!ENTITY    ii   "i"             ><!--
            short form of &ImaginaryI;  -->


<!ENTITY    NotANumber   "NaN"><!--
              used in 4.3.2.9    -->

<!ENTITY    true   "T"             ><!--
            logical constant true  -->
