AS ISO 18626:2018 Information and documentation—Interlibrary Loan Transactions
Closed Code Lists (see 4.9) are a normative part of this document and shall be supported by applications conformant with this document. They are similar to Open Code Lists, except that Closed Code Lists of values are expected to be relatively comprehensive and stable. Therefore, no online version of these lists shall be made available. However, new closed code scheme elements and code values may be added to the future versions of this document.
Date and time shall always be provided in the form YYYY-MM-DDThh:mm:ssZ as specified by ISO 8601.
When time is not significant, e.g. when a due date is given, use 23:59:59Z to indicate the time, for example, 2013-05-15T23:59:59Z.
Use of the identifiers in Table B.1 shall be according to the referred standards: ISIL according to ISO 15511, ISBN according to ISO 2108, ISSN according to ISO 3297 and ISMN according to ISO 10957.
Use of the symbols in Table 7 shall be according to the referred standards: currency symbol to ISO 4217,region symbol to ISO 3166-2 and country symbol to ISO 3166-1.
4.2  Request
The Request contains information about the item and service requested.
The Request is sent from the requesting agency to the supplying agency.
The Request contains some or all of the following groups of data elements as shown in Table 1.
— Header: administrative information
— BibliographicInfo: details of the item being requested
— PublicationInfo: information about the publication
— ServiceInfo: details of the service being requested
— SupplierInfo: list of potential suppliers
— RequestedDeliveryInfo: where and how to send the item
— RequestingAgencyInfo: details about the requesting agency
— PatronInfo: details about the patron
— BillingInfo: how to charge the requesting agency
Type of service. Values: Copy, Loan or CopyOrLoan. If Copy is requested, then the requesting library is interested only in a copy. If Loan is requested, then the requesting library is interested only in a loan. If CopyOrLoan is requested, then the requesting library is willing to accept either a copy or a loan.