Hi.
This works:

substring(ExtractValue(marcxml,'//controlfield[@tag="008"]'), 8,4 ) AS 'PUB DATE'

Good luck.

On 11/09/2017 18:15, Luis Moises Rojas wrote:
Hello everybody
I am trying to use this instruction, but does not work,
i am using koha 17.05.

  ExtractValue(marcxml,'//controlfield[@tag="008"]'), 8,4 ) AS 'PUB DATE'


thanks



--
Ian Bays
Director of Projects, PTFS Europe Limited
Content Management and Library Solutions

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