Preaward Catalogue Request

one of TC440 main objective is a stand-alone pre-award catalogue request
message. This is a message used by the contracting authority to describe
the requirements on the items the contracting authority intends to
tender. Up to now, the pre-award catalogue request was part of the Call
for tenders message and thus bound to the Call for tenders message of
UBL. As it should be now a stand-alone message, we can't use the Call
for tenders message anymore. As an alternative we consider the UBL's
catalogue request message. But as you may be know, this message is
intended to be used in post-award processes, for instance, in BII's
multi-party catalogue profile. So, there are some business terms in the
transaction model that can't be bound to an appropriate syntax element
of UBL's catalogue request message. The most important business terms are

• Item request minimum price
• Item request maximum price
• (Requested) Delivery period
• Item property request description (cac:AdditionalProperty has no
  description element)
• Item property request classification (with cardinality of 0..* instead
  of 0..1 of cac:Item/cac:AdditionalProperty/cbc:NameCode
• Estimated value
• Total budget amount