Reserved identifiers

Several identifiers are reserved, and this means that they may not be used as:

The following identifiers are reserved:

Arc abstype action all and andalso as
bool by
case color colorset colset
datatype declare do
else empty end EntireGraph eqtype exception
Fair false fn fun functor 
if Impartial in include index infix infixr input int
let list local
Node NoFairness NoLimit NONE nonfix not 
o of op open orelse output
print product
raise real rec record ref
Scc sharing sig signature size SOME step string struct structure subset
then time tms true type
val var
while with

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