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Re: dimension based checksums

Dear Berthold,

You caught a typo (read 1 not 0).  Now reread the 
corrected message.

In particular, if you agree that:

 > It wouldn't make sense to replace an existing dimension.

(namely pure number fontdimen 1) then the approach I 
sketched is the only one I know.  

Larry S

PS.  Incidentally I was slightly exagerating the simplicity of 
extracting an pure integer checksum from dimensions,
but the idea is OK.