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acknowledgements for ansi/nist-itl 1-2011 - NIST Visual Image ...

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ANSI/<strong>NIST</strong>-ITL 1-<strong>2011</strong> - UPDATE 2013 DRAFT VERSIONC.5.7 Record lengthThere is no corresponding XML element. See Section 7.1.C.5.8 <strong>Image</strong> data<strong>Image</strong> data shall be converted to ASCII characters using the Base-64 encoding algorithm.(See Section 7.2)mrHbPdrko3u1s7ahtgPBjtmO1s85tfG2U7bpofY94Czu2SbY7d7wF9fQ7ZptgGrtkO2a2dsJ7wZbe8BlzvAmQ7xq+Y94GoHeEsR3ikWd4DIGhzmp3k42d4DRmzs94DKveDTB3hqw6PeBLrtpPep0H+hC.6 Missing Data <strong>for</strong> Mandatory and Optional ElementsIf the base specification and schema define an element as optional, it should be omittedaltogether rather than transmitting the element tags without any data content.For mandatory elements, in all cases, the element tags shall appear in the instance package.When there is no in<strong>for</strong>mation to be transmitted <strong>for</strong> a mandatory element, prior agreementshall be made with the recipient agency or organization be<strong>for</strong>e constructing and transmittingan instance package. For cases where an agreement is made to accept records with missingmandatory data, the following recommendations are made.C.6.1 Missing Mandatory String Element Data (nc:TextType)The content of certain elements (such as agency identifiers or types of transaction) is left tousers to define. For example, it is stated in this standard that the content of the element (or Source agency/SRC) “shall be defined by the user and bein accordance with the receiving agency.” The sender and receiver may choose to establishan identifier <strong>for</strong> missing in<strong>for</strong>mation. In this case, the preferred representation <strong>for</strong> missingdata is to use the value “UNKNOWN” (provided that there is no other option available).UNKNOWNC.6.2 Missing Mandatory Date Element Data (nc:Date)Due to NIEM rules <strong>for</strong> date elements, the preferred representation <strong>for</strong> missing date data is to“nil” the parent element, as shown in this example:Partially missing date data may be represented as follows:462

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