<status value="draft" /> <experimental value="true" /> <date value="2019-02-10T00:11:08+00:00" /> <publisher value="HL7 FHIR Standard" /> <contact> <telecom> <system value="url" /> <value value="http://hl7.org/fhir" /> </telecom> </contact> <description value="Data Element for Attachment.hash" /> <purpose value="Data Elements are defined for each element to assist in questionnaire construction etc" /> <fhirVersion value="4.0.0" /> <mapping> <identity value="v2" /> <uri value="http://hl7.org/v2" /> <name value="HL7 v2 Mapping" /> </mapping> <mapping> <identity value="rim" /> <uri value="http://hl7.org/v3" /> <name value="RIM Mapping" /> </mapping> <kind value="logical" /> <abstract value="false" /> <type value="Attachment.hash" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Element" /> <derivation value="specialization" /> <snapshot> <element id="Attachment.hash"> <path value="Attachment.hash" /> <short value="Hash of the data (sha-1, base64ed)" /> <definition value="The calculated hash of the data using SHA-1. Represented using base64." /> <comment value="The hash is calculated on the data prior to base64 encoding, if the data is based64 encoded. The hash is not intended to support digital signatures. Where protection against malicious threats a digital signature should be considered, see [Provenance.signature](provenance-definitions.html#Provenance.signature) for mechanism to protect a resource with a digital signature." /> <requirements value="Included so that applications can verify that the contents of a location have not changed due to technical failures (e.g., storage rot, transport glitch, incorrect version)." /> <min value="0" /> <max value="1" /> <base> <path value="Attachment.hash" /> <min value="0" /> <max value="1" /> </base> <type> <code value="base64Binary" /> </type> <isModifier value="false" /> <isSummary value="true" /> <mapping> <identity value="rim" /> <map value=".integrityCheck[parent::ED/integrityCheckAlgorithm="SHA-1"]" /> </mapping> </element> </snapshot> </StructureDefinition>