This element MUST be conveyed as the root element in any instance document based on this Schema expressionABIEContract Documents. DetailsThe document used for a Contracting Authority to define the procuring project to buy goods, services or works during an specified period.Contract DocumentsA container for all extensions present in the document.BBIEContract Documents. UBL Version Identifier. IdentifierThe version of the UBL schema being used.0..1Contract DocumentsUBL Version IdentifierIdentifierIdentifier. TypeBBIEContract Documents. Subset Identifier. IdentifierThe identifier for a user defined subset of UBL.0..1Contract DocumentsIdentifierIdentifierIdentifier. TypeBBIEContract Documents. Profile Identifier. IdentifierThe identifier for a user defined profile of the subset of UBL being used.0..1Contract DocumentsIdentifierIdentifierIdentifier. TypeBBIEContract Documents. IdentifierAn identifier for the Contract Documents assigned by the Contracting Authority Party0..1Contract DocumentsIdentifierIdentifierIdentifier. TypeBBIEContract Documents. Copy_ Indicator. IndicatorIndicates whether a document is a copy (true) or not (false)0..1Contract DocumentsCopyIndicatorIndicatorIndicator. TypeBBIEContract Documents. UUID. IdentifierA computer-generated universally unique identifier (UUID) for the Invoice instance0..1Contract DocumentsUUIDIdentifierIdentifier. TypeBBIEContract Documents. Contract File ID. IdentifierAn identifier for the process file (i.e. record) to which belongs the notification assigned by the sender.1Contract DocumentsContract File IdentifierIdentifierIdentifier. TypeBBIEContract Documents. Approval Date. DateThe date assigned by the Contractor on which the Contract Documents were approved.0..1Contract DocumentsApproval DateDateDate. TypeBBIEContract Documents. Issue Date. DateThe date assigned by the Contractor on which the Contract Documents were issued1Contract DocumentsIssue DateDateDate. TypeBBIEContract Documents. Issue Time. TimeThe time assigned by the Contractor on which the Contract Documents were issued0..1Contract DocumentsIssue TimeTimeTime. TypeASBIEContract Documents. Legal_ Document ReferenceAn association to a Legal Document Reference1Contract DocumentsLegalDocument ReferenceDocument ReferenceASBIEContract Documents. Technical_ Document ReferenceAn association to a Technical Document Reference1Contract DocumentsTechnicalDocument ReferenceDocument ReferenceASBIEContract Documents. Additional_ Document ReferenceAn association to additional document references0..nContract DocumentsAdditionalDocument ReferenceDocument ReferenceASBIEContract Documents. Procuring ProjectAn association to a procuring project.1Contract DocumentsProcuring ProjectProcuring ProjectASBIEContract Documents. Contracting Authority PartyAn association to a contracting authority Party.1Contract DocumentsContracting Authority PartyContracting Authority PartyASBIEContract Documents. Tendering TermsAn association to a tendering terms.1Contract DocumentsTendering TermsTendering TermsASBIEContract Documents. Tendering ProcessAn association to a tendering process.1Contract DocumentsTendering ProcessTendering Process