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Some cladistic terms

I'm currently digging through Dinosauria II and would like to ask for some 
clarification on the following terms:

What is the difference between ACCTRANS and DELTRANS?

Is "bootstrapping" in a cladistic analysis the same as in other branches 
of data modelling i.e., making copies of the original data set by randomly 
choosing elements and submitting them to the same analysis to check for 
statistic significance?

Thanks for any help,


                   Priv.-Doz. Dr. Martin BÃker
                   Institut fÃr Werkstoffe
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