<?xml version="1.0" encoding="UTF-8"?><StructureDefinition xmlns="http://hl7.org/fhir"><id value="oid"/><text><status value="generated"/><div xmlns="http://www.w3.org/1999/xhtml">to do</div></text><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status"><valueCode value="normative"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-normative-version"><valueCode value="4.0.0"/></extension><url value="http://hl7.org/fhir/StructureDefinition/oid"/><version value="4.0.1"/><name value="oid"/><status value="active"/><date value="2019-11-01T09:29:23+11:00"/><publisher value="HL7 FHIR Standard"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom></contact><description value="Base StructureDefinition for oid type: An OID represented as a URI"/><fhirVersion value="4.0.1"/><kind value="primitive-type"/><abstract value="false"/><type value="oid"/><baseDefinition value="http://hl7.org/fhir/StructureDefinition/uri"/><derivation value="specialization"/><snapshot><element id="oid"><path value="oid"/><short value="Primitive Type oid"/><definition value="An OID represented as a URI"/><comment value="RFC 3001. See also ISO/IEC 8824:1990 &#x20AC;"/><min value="0"/><max value="*"/><base><path value="oid"/><min value="0"/><max value="*"/></base><constraint><key value="ele-1"/><severity value="error"/><human value="All FHIR elements must have a @value or children"/><expression value="hasValue() or (children().count() &gt; id.count())"/><xpath value="@value|f:*|h:div"/><source value="http://hl7.org/fhir/StructureDefinition/Element"/></constraint><isModifier value="false"/><isSummary value="false"/></element><element id="oid.id"><path value="oid.id"/><representation value="xmlAttr"/><short value="xml:id (or equivalent in JSON)"/><definition value="unique id for the element within a resource (for internal references)"/><min value="0"/><max value="1"/><base><path value="Element.id"/><min value="0"/><max value="1"/></base><type><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"><valueUrl value="string"/></extension><code value="http://hl7.org/fhirpath/System.String"/></type><isModifier value="false"/><isSummary value="false"/></element><element id="oid.extension"><path value="oid.extension"/><short value="Additional content defined by implementations"/><definition value="May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/><comment value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/><alias value="extensions"/><alias value="user content"/><min value="0"/><max value="*"/><base><path value="Element.extension"/><min value="0"/><max value="*"/></base><type><code value="Extension"/></type><constraint><key value="ele-1"/><severity value="error"/><human value="All FHIR elements must have a @value or children"/><expression value="hasValue() or (children().count() &gt; id.count())"/><xpath value="@value|f:*|h:div"/><source value="http://hl7.org/fhir/StructureDefinition/Element"/></constraint><constraint><key value="ext-1"/><severity value="error"/><human value="Must have either extensions or value[x], not both"/><expression value="extension.exists() != value.exists()"/><xpath value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &#39;value&#39;)])"/><source value="http://hl7.org/fhir/StructureDefinition/Extension"/></constraint><isModifier value="false"/><isSummary value="false"/></element><element id="oid.value"><path value="oid.value"/><representation value="xmlAttr"/><short value="Primitive value for oid"/><definition value="Primitive value for oid"/><min value="0"/><max value="1"/><base><path value="uri.value"/><min value="0"/><max value="1"/></base><type><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"><valueUrl value="string"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/regex"><valueString value="urn:oid:[0-2](\.(0|[1-9][0-9]*))+"/></extension><code value="http://hl7.org/fhirpath/System.String"/></type><isModifier value="false"/><isSummary value="false"/></element></snapshot><differential><element id="oid"><path value="oid"/><short value="Primitive Type oid"/><definition value="An OID represented as a URI"/><comment value="RFC 3001. See also ISO/IEC 8824:1990 &#x20AC;"/><min value="0"/><max value="*"/></element><element id="oid.value"><path value="oid.value"/><representation value="xmlAttr"/><short value="Primitive value for oid"/><definition value="Primitive value for oid"/><min value="0"/><max value="1"/><type><extension url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type"><valueUrl value="oid"/></extension><extension url="http://hl7.org/fhir/StructureDefinition/regex"><valueString value="urn:oid:[0-2](\.(0|[1-9][0-9]*))+"/></extension><code value="http://hl7.org/fhirpath/System.String"/></type></element></differential></StructureDefinition>