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OpenProposal should explicitly support commercial offers combining multiple media channels into a coordinated advertising campaign.
For example, an OOH or DOOH campaign in public transport environments may be complemented by social media, mobile or display advertising to extend audience reach and reinforce campaign effectiveness.
Although OpenProposal supports multiple line items, it does not explicitly standardize all the commercial and operational relationships between channels within a coordinated campaign.
We recommend supporting:
Cross-media packages combining OOH, DOOH, social media, mobile and display.
Mandatory versus optional complementary media components.
Shared campaign objectives and coordinated activation periods.
Channel-specific budgets and overall package pricing.
Conditional discounts or pricing linked to combined media purchases.
Cross-media audience measurement and reporting references.
Explicit identification of the parties responsible for delivering each component.
This would allow buying agents to understand and compare integrated advertising offers rather than evaluating each media channel independently.
Concrete scenario
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Package and channel budgets: a commitment set (our commitment-set reply on #23). Each line item keeps its own commitment, its channel budget. The set adds one currency, a derived total, and a max_total over all of them.
Social and mobile: a display, native, or video line item on an app or site (our channel definitions change request). buying_route already has SEARCH_SOCIAL.
Should a commitment set also state this issue's shared objective and coordinated activation period, for example by requiring aligned flights across its line items, or is each line item's own flight enough?
Should proposal-level spend tiers (min_proposal_commitment) join the line-item dependencies draft PR (#70), attach to a commitment set as a minimum next to max_total, or stay out of 3.0?
Should social and mobile stay display, native, or video line items on an app or site, as our channel definitions change request proposes, or get their own channel values?
Analyzed and generated with the help of Claude, fully reviewed by me.
Activity
KonstantinMirin commentedon Oct 22, 2026
Postindustria (IAB Tech Lab member) maps #86 to proposals already open:
linked_execution,requires, and bonus lines (#23, line-item dependencies; draft PR #70).currency, a derivedtotal, and amax_totalover all of them.min_proposal_commitmentas not included.billing.supplier_id(§ 5.10) and #28, cross-publisher composition.display,native, orvideoline item on an app or site (our channel definitions change request).buying_routealready hasSEARCH_SOCIAL.We suggest tracking #86 under #23.
Open questions:
min_proposal_commitment) join the line-item dependencies draft PR (#70), attach to a commitment set as a minimum next tomax_total, or stay out of 3.0?display,native, orvideoline items on an app or site, as our channel definitions change request proposes, or get their ownchannelvalues?Analyzed and generated with the help of Claude, fully reviewed by me.