Word description
A definition of a class of errors

Instances contain the following slots:
typesymbol representing the error type.
wordname of the word that lists all errors of this error type.
pluralpluralized description of this error type.
iconpath to an icon image representing this error type.
quotquotation that produces a list of all errors of this type.
forget-quota quotation that removes errors of this type for a given word.
fatal?whether the error is fatal or not. default t.


TUPLE: error-type-holder
type word plural icon quot forget-quot { fatal? initial: t }