How to get a clean list of terms without duplicates

Cortesía de Ernesto Spinak

There is simple and effective way to get a clean list of terms without duplicates using Cisis utitlies from the command line

mxtb is a tabulator, i.e. it can extract all different instances of a data (see the manual)

I'll do an example using a marc database, to get an author list authors are recorded in v100^a and v700^a (repeatable) so the line would be

    mxtb marc create=author  "100:v100^a/(v700^a/)" class=2000 tell=100

it will get out something like

    mxtb: 5100 recs in
          1230 tabs
          860 recs out

just in case you have an error return, like the following line, fatal: mxtb/maxhash overflow the problem is that you have more than 2000 instances, then you increase the number to class=3000 or 10000 or ...etc

The author database has three fields like the example, one record for each different key

    mx author
    mfn=     1
      1  «Leite, José Alfredo A. (José Alfredo Américo).»
    998  «999999998»
    999  «1»

then you export the unique names

    mx author "proc='d998d999'" iso=author.iso now -all tell=100

mxtb is case sensitive