Feature request: cattax support in bidResponseFilter

[dgirardi]

Type of issue

Feature request

Description

The bidResponseFilter module should support ORTB 2.6 cattax.

Proposal

• update ortbConverter to carry over cattax from ORTB seatbid.bid.cattax into bid response's meta.cattax.
• bidResponseFilter should check response categories (meta.primaryCatId/meta.secondaryCatIds) against requests' bcat only when meta.cattax matches the request's cattax. (When not specified, cattax defaults to 1).
• When cattax does not match, the category should be considered unknown for the purposes of filtering (and controlled by the blockUnknown config).

[patmmccann]

Ideally, this should support if cattax varies over bidders. Openpath has migrated to content 2.2 and the IABTL is encouraging everyone to move to Ad Product taxonomy. Bidders may expect different bcat taxonomies.