How should we map fields I.3.3.1 (ADDRESS_FURTHER_INFO_IDEM) and I.3.4.2 (CONTRACTING_BODY/ADDRESS_PARTICIPATION_IDEM) when there are multiple Buyers

[csnyulas]

This is question raised by @muricna, which was added as a comment to a related issue: #258 (comment)

1.3.3.1 When there is more than one buyer and therefore more than one address above should there not both addresses be foreseen.

The question is applicable for the mapping of either of the fields called "The above mentioned address" which can appear in F21, F22 and F23:

• field I.3.3.1 with XPath: CONTRACTING_BODY/ADDRESS_FURTHER_INFO_IDEM, and
• field I.3.4.2 with XPath: CONTRACTING_BODY/ADDRESS_PARTICIPATION_IDEM

Currently, if the XML element ADDRESS_FURTHER_INFO_IDEM, resp. ADDRESS_PARTICIPATION_IDEM, is present in the XML notice, we will create an epo:ProcurementProcedureInformationProvider, resp. epo:TenderReceiver, instance by using the information that is available on the Buyer, at XPATH CONTRACTING_BODY/ADDRESS_CONTRACTING_BODY. In case there are multiple buyers, which are expressed by the existence of (possibly multiple) CONTRACTING_BODY/ADDRESS_CONTRACTING_BODY_ADDITIONAL XML element(s), we do not map any of those additional addresses into the epo:ProcurementProcedureInformationProvider and/or the epo:TenderReceiver class.

The current solution has a clear interpretation: The "main" buyer, or the buyer mentioned first, is the one where further information can be obtained, resp. tenders/requests can be submitted. It is worth noting that the question does not imply in any form that there might be multiple such addresses. It is "The above mentioned address", not "The above mentioned address(es)"

If the current solution is not enough/appropriate, we will need to discuss:

• What does it meansto have multiple epo:ProcurementProcedureInformationProvider and/or the epo:TenderReceiver instances?
• If there are epo:ProcurementProcedureInformationProvider and/or the epo:TenderReceiver instances, is there any order of preference where the additional information can be obtained from, or tenders/request submitted to? How can we encode such order of preference?
• Do we need to create epo:ProcurementProcedureInformationProvider and/or the epo:TenderReceiver instances for all additional buyers (besides the "main" buyer), or just some of them? How would we know for which ones?