Ok, I've figured out some answers. Although the CampaignCriterion and AdGroupCriterion classes look rather like they are building an N:N relation forcampaign-criterion and adgroup-criterion respectively, they are not. Instead, a criterion "belongs" to either a CampaignCriterion or AdGroupCriterion, and is created when its owner is ADDed.
It is therefore not possible to link the *same* criterion object to multiple AdGroup objects; a new one is created for each adgroup. And an AdParam is really "attached" to an AdGroupCriterion; the AdParam "key" is (groupid, criterionid) which is the same as the key for an AdGroupCriterion. I'd still appreciate some info on the purpose of CampaignCriterion.... -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Have you migrated to v200909 yet? The v13 sunset is on April 22, 2010. Also find us on our blog and discussion group: http://adwordsapi.blogspot.com http://groups.google.com/group/adwords-api =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API Forum" group. To post to this group, send email to adwords-api@googlegroups.com To unsubscribe from this group, send email to adwords-api+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/adwords-api?hl=en
