[Xmlgraphics-fop Wiki] Update of "FontSelectionStrategy" by MaxBerger

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The following page has been changed by MaxBerger:
http://wiki.apache.org/xmlgraphics-fop/FontSelectionStrategy

The comment on the change is:
added some references

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  Chatting with Manuel over Skype, he told me to pay attention on the dependencies between LM instances over the !AlignmentContext. Looking at this class shows that it takes values from a single font. So, the difficulty is not really keeping track of which font is used for each character. More difficult is to keep vertical alignment (baselines, ascenders etc.) under control. The situation with the dependencies needs to be improved which could make the implementation of the font-selection-strategy easier. Manuel suggests to follow the first approach above, unless those dependencies can be fixed in which case the second approach would work nicely.
  
+ There is a bug related to this issue, which has comments:
+ 
+ http://issues.apache.org/bugzilla/show_bug.cgi?id=39422
+ 
+ There is also a character-by-character font selection for JEuclid, which may serve as a reference. Please look at:
+ 
+ http://jeuclid.sourceforge.net/jeuclid-core/xref/net/sourceforge/jeuclid/elements/support/text/StringUtil.html#102
+ 
+ http://jeuclid.sourceforge.net/jeuclid-core/xref/net/sourceforge/jeuclid/elements/support/attributes/MathVariant.html#194
+ 

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