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I am currently working on migrating all my nodes from a Drupal 6 site to a Drupal 7 one. The site in Drupal 6 is heavily dependent upon taxonomy and has around 7 vocabularies applied to all the content types. So when I export a node of type "News", I get a whole bunch of fields in my DSV file such as field_news_body['0']['value'] & field_news_primary_image['0']['filepath']. However, all the taxonomy terms associated with this node are present as
field name: taxonomy['3']['29']; value: 29
field name: taxonomy['3']['31']; value: 31
field name: taxonomy['4']['39']; value: 39
field name: taxonomy['4']['40']; value: 40
field name: taxonomy['5']['47']; value: 47
In this, the first  is pointing to the vid and the second  is pointing to the tid. I was hoping that the export will group the terms belonging to one vocabulary together in one field and the values would be comma separated such as
field name: taxonomy['3']; value: 29,31
I don't know how to map such specific term field names to the term reference fields in Drupal 7.
Currently, I am only working on exporting just one node and have been unsuccessful in bringing / interpreting the taxonomy terms from Drupal 6 to Drupal 7.
I have tried looking everywhere and have been unable to find a solution for this problem that I am facing. I am hoping someone will be kind enough to shed some light on this or at least tell me if what I expect is not possible.
If I am not clear, please ask and I will try and explain as well as I can.
Many thanks in advance!