An authorization for the supply of glasses and/or contact lenses to a patient.

A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content.

Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element.

This element is labelled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation.

An Extension

R4: VisionPrescription.created (new:dateTime)

Element VisionPrescription.created has a context of VisionPrescription based on following the parent source element upwards and mapping to VisionPrescription. Element VisionPrescription.created has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).

May be used to represent additional information that is not part of the basic definition of the resource, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

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.

The status of the resource instance.

A code specifying the state of the resource instance.

R4: VisionPrescription.created (new:dateTime)

Element VisionPrescription.created has a context of VisionPrescription based on following the parent source element upwards and mapping to VisionPrescription. Element VisionPrescription.created has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).

R4: VisionPrescription.prescriber additional types from child elements (display, identifier, reference, type)

Element VisionPrescription.prescriber is mapped to FHIR STU3 element VisionPrescription.prescriber as SourceIsBroaderThanTarget. The mappings for VisionPrescription.prescriber do not cover the following types based on type expansion: display, identifier, reference, type. The standard extension alternate-reference has been mapped as the representation of FHIR R4 element VisionPrescription.prescriber with unmapped reference targets: PractitionerRole.

R4: VisionPrescription.lensSpecification.prism (new:BackboneElement)

Element VisionPrescription.lensSpecification.prism has a context of VisionPrescription.dispense based on following the parent source element upwards and mapping to VisionPrescription. Element VisionPrescription.lensSpecification.prism has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).

An authorization for the supply of glasses and/or contact lenses to a patient.

The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.

The only time that a resource does not have an id is when it is being submitted to the server using a create operation.

The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content may not always be associated with version changes to the resource.

A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content.

Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element.

This element is labelled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation.

The base language in which the resource is written.

Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute).

A human language.

A human-readable narrative that contains a summary of the resource, and may be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.

Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded in formation is added later.

These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope.

This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again.

An Extension

R4: VisionPrescription.created (new:dateTime)

Element VisionPrescription.created has a context of VisionPrescription based on following the parent source element upwards and mapping to VisionPrescription. Element VisionPrescription.created has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).

May be used to represent additional information that is not part of the basic definition of the resource, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

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.

Business identifier which may be used by other parties to reference or identify the prescription.

The status of the resource instance.

A code specifying the state of the resource instance.

A link to a resource representing the person to whom the vision products will be supplied.

A link to a resource that identifies the particular occurrence of contact between patient and health care provider.

The date (and perhaps time) when the prescription was written.

The healthcare professional responsible for authorizing the prescription.

unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

An Extension

R4: VisionPrescription.prescriber additional types from child elements (display, identifier, reference, type)

Element VisionPrescription.prescriber is mapped to FHIR STU3 element VisionPrescription.prescriber as SourceIsBroaderThanTarget. The mappings for VisionPrescription.prescriber do not cover the following types based on type expansion: display, identifier, reference, type. The standard extension alternate-reference has been mapped as the representation of FHIR R4 element VisionPrescription.prescriber with unmapped reference targets: PractitionerRole.

A reference to a location at which the other resource is found. The reference may be a relative reference, in which case it is relative to the service base URL, or an absolute URL that resolves to the location where the resource is found. The reference may be version specific or not. If the reference is not to a FHIR RESTful server, then it should be assumed to be version specific. Internal fragment references (start with '#') refer to contained resources.

Using absolute URLs provides a stable scalable approach suitable for a cloud/web context, while using relative/logical references provides a flexible approach suitable for use when trading across closed eco-system boundaries. Absolute URLs do not need to point to a FHIR RESTful server, though this is the preferred approach. If the URL conforms to the structure "/[type]/[id]" then it should be assumed that the reference is to a FHIR RESTful server.

An identifier for the other resource. This is used when there is no way to reference the other resource directly, either because the entity is not available through a FHIR server, or because there is no way for the author of the resource to convert a known identifier to an actual location. There is no requirement that a Reference.identifier point to something that is actually exposed as a FHIR instance, but it SHALL point to a business concept that would be expected to be exposed as a FHIR instance, and that instance would need to be of a FHIR resource type allowed by the reference.

When an identifier is provided in place of a reference, any system processing the reference will only be able to resolve the identifier to a reference if it understands the business context in which the identifier is used. Sometimes this is global (e.g. a national identifier) but often it is not. For this reason, none of the useful mechanisms described for working with references (e.g. chaining, includes) are possible, nor should servers be expected to be able resolve the reference. Servers may accept an identifier based reference untouched, resolve it, and/or reject it - see CapabilityStatement.rest.resource.referencePolicy.

When both an identifier and a literal reference are provided, the literal reference is preferred. Applications processing the resource are allowed - but not required - to check that the identifier matches the literal reference

Applications converting a logical reference to a literal reference may choose to leave the logical reference present, or remove it.

Plain text narrative that identifies the resource in addition to the resource reference.

This is generally not the same as the Resource.text of the referenced resource. The purpose is to identify what's being referenced, not to fully describe it.

Can be the reason or the indication for writing the prescription.

Deals with details of the dispense part of the supply specification.

unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

An Extension

R4: VisionPrescription.lensSpecification.prism (new:BackboneElement)

Element VisionPrescription.lensSpecification.prism has a context of VisionPrescription.dispense based on following the parent source element upwards and mapping to VisionPrescription. Element VisionPrescription.lensSpecification.prism has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).

May be used to represent additional information that is not part of the basic definition of the element, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

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.

Identifies the type of vision correction product which is required for the patient.

A coded concept describing the vision products.

The eye for which the lens applies.

A coded concept listing the eye codes.

Lens power measured in diopters (0.25 units).

Power adjustment for astigmatism measured in diopters (0.25 units).

Adjustment for astigmatism measured in integer degrees.

Amount of prism to compensate for eye alignment in fractional units.

The relative base, or reference lens edge, for the prism.

A coded concept listing the base codes.

Power adjustment for multifocal lenses measured in diopters (0.25 units).

Contact lens power measured in diopters (0.25 units).

Back curvature measured in millimeters.

Contact lens diameter measured in millimeters.

The recommended maximum wear period for the lens.

Special color or pattern.

Brand recommendations or restrictions.

Notes for special requirements such as coatings and lens materials.