Re: [MathML 4] Add rules to map from non-combining to combining accents

I can add some extra cross reference elements to Unicode.xml to map 
"related" combining and non combining forms.  I suggest an initial set 
might be as at the end of this message

Ignore the actual syntax below, it uses the same ids as unicode.xml for 
ease of merging later. The mapping is not 1-1 but that is Ok I suspect 
in this context.

I would propose to add an element referring to U00060 in the entry for 
U00300 and a (different) cross reference in the reverse direction.

Syntax to be determined but something in the style of the existing
          <surrogate mathvariant="bold" ref="U00041"/>
which maps the "holes" in the  math alphabet blocks to the equivalent 
bmp character.

David






<map>
     <a combining="U00300" style="above" name="COMBINING GRAVE ACCENT" 
noncomb="U00060" />
     <a combining="U00301" style="above" name="COMBINING ACUTE ACCENT" 
noncomb="U000B4" />
     <a combining="U00302" style="above" name="COMBINING CIRCUMFLEX 
ACCENT" noncomb="U002C6" />
     <a combining="U00302" style="above" name="COMBINING CIRCUMFLEX 
ACCENT" noncomb="U0005E" />
     <a combining="U00303" style="above" name="COMBINING TILDE" 
noncomb="U0007E" />
     <a combining="U00304" style="above" name="COMBINING MACRON" 
noncomb="U000AF" />
     <a combining="U00305" style="above" name="COMBINING OVERLINE" 
noncomb="U0203E" />
     <a combining="U00305" style="above" name="COMBINING OVERLINE" 
noncomb="U000AF" />
     <a combining="U00306" style="above" name="COMBINING BREVE" 
noncomb="U002D8" />
     <a combining="U00307" style="above" name="COMBINING DOT ABOVE" 
noncomb="U002D9" />
     <a combining="U00308" style="above" name="COMBINING DIAERESIS" 
noncomb="U00308" />
     <a combining="U0030B" style="above" name="COMBINING DOUBLE ACCUTE 
ACCENT" noncomb="U002DD" />
     <a combining="U0030C" style="above" name="COMBINING CARON" 
noncomb="U002C7" />
     <a combining="U00316" style="below" name="COMBINING GRAVE ACCENT 
BELOW" noncomb="U00060" />
     <a combining="U00317" style="below" name="COMBINING ACUTE ACCENT 
BELOW" noncomb="U000B4" />
     <a combining="U0031F" style="below" name="COMBINING PLUS SIGN 
BELOW" noncomb="U0002B" />
     <a combining="U00320" style="below" name="COMBINING MINUS SIGN 
BELOW" noncomb="U0002D" />
     <a combining="U00327" style="below" name="COMBINING CEDILLA" 
noncomb="U000B8" />
     <a combining="U00328" style="below" name="COMBINING OGONEK" 
noncomb="U002DB" />
     <a combining="U00332" style="below" name="COMBINING LOW LINE" 
noncomb="U0005F" />
     <a combining="U00338" style="above" name="COMBINING LONG SOLIDUS 
OVERLAY" noncomb="U002F" />
</map>

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