Yeah, Author collection is ok
But I want to keep series and authors separeted, so Author shelves are prefixed by "__ Author"
given that
seriesPre = series.ifempty('__ Author' + field{Author})
What I want is a collection field that fullfill this rule:
IF tag == 'ELECTRONICS':
->series = '__ Electronics'
elif tag == 'HISTORY':
->series = '__ HISTO ' + {#seriesPre}
...
Hope is more clear...
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