# DVGRPID?

**URL:** <https://forum.certara.com/t/dvgrpid/240>\
**Category:** SDTM\
**Created:** [September 13, 2011, 8:25am UTC](https://forum.certara.com/t/dvgrpid/240 "2011-09-13T08:25:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Anthony\_Chow](https://avatars.discourse-cdn.com/v4/letter/a/b77776/32.png) [@Anthony\_Chow](https://forum.certara.com/u/Anthony_Chow)\
**Post date:** [December 10, 2011, 4:41pm UTC](https://forum.certara.com/t/dvgrpid/240/1 "2011-12-10T16:41:25Z")

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joerg.liebner,

Two places we can check when a variable appears in a dataset that does not appear in the SDTMIG modeled domain tables:

1. SDTM: SDMIG v1.2, section 2.2.4, pg. 15

> _All of the following Identifier variables are available for use in any domain based on one of the three general observation classes. STUDYID, DOMAIN, USUBJID, and --SEQ are required in all domains based on one of the three general observation classes._

where --GRPID is one of the identifier variables listed.

1. Assumption section of the corresponding domain in SDTMIG: SDTMIG v3.1.2, section 6.2.4.1(3), pg. 118 does _not_ list --GRPID as one of the “would not be used in DV”.

Therefore, DVGRPID is legal.

HTH.

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**Author:** ![joerg.liebner](https://avatars.discourse-cdn.com/v4/letter/j/a183cd/32.png) [@joerg.liebner](https://forum.certara.com/u/joerg.liebner)\
**Post date:** [September 13, 2011, 8:25am UTC](https://forum.certara.com/t/dvgrpid/240/2 "2011-09-13T08:25:52Z")

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Hello,

the data files for OpenCDISC contain a variable DVGRPID for 3.1.1. and 3.1.2. But this variable does not occur in the SDTMIMG. So is this an error, and whose error is it? Is DVGRPID legal?