2nd DSTU Draft For Comment

This page is part of the FHIR Specification (v0.4.0: DSTU 2 Draft). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions

Valueset.questionnaire.xml

Raw XML (canonical form)

Generated Questionnaire for ValueSet

<?xml version="1.0" encoding="UTF-8"?>

<Questionnaire xmlns="http://hl7.org/fhir">
  <id value="qs1"/>
  <identifier>
    <system value="urn:ietf:rfc:3986"/>
  </identifier>
  <status value="draft"/>
  <date value="2015-02-23T09:07:27+11:00"/>
  <publisher value="HL7 FHIR Project (Vocabulary)"/>
  <group>
    <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
      <valueString value="A value set specifies a set of codes drawn from one or more code systems."/>
    </extension>
    <linkId value="ValueSet"/>
    <title value="A set of codes drawn from one or more code systems"/>
    <required value="true"/>
    <repeats value="false"/>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="The logical id of the resource, as used in the url for the resoure. 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. Bundles always have an id, though it is usually a generated UUID."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="string"/>
      </extension>
      <linkId value="ValueSet.id"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.id.value"/>
        <text value="Logical id of this artefact"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="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."/>
      </extension>
      <linkId value="ValueSet.meta"/>
      <text value="Metadata about the resource"/>
      <required value="false"/>
      <repeats value="true"/>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="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 as much as possible."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="uri"/>
      </extension>
      <linkId value="ValueSet.implicitRules"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.implicitRules.value"/>
        <text value="A set of rules under which this content was created"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="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)."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="code"/>
      </extension>
      <linkId value="ValueSet.language"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.language.value"/>
        <text value="language"/>
        <type value="choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="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 &quot;clinically safe&quot; 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."/>
      </extension>
      <linkId value="ValueSet.text"/>
      <text value="Text summary of the resource, for human interpretation"/>
      <required value="false"/>
      <repeats value="true"/>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="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."/>
      </extension>
      <linkId value="ValueSet.contained"/>
      <text value="Contained, inline Resources"/>
      <required value="false"/>
      <repeats value="true"/>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="The uri that is used to identify this value set when it is referenced in a specification, model, design or an instance (should be globally unique URI, and an be urn:uuid: or urn:oid:)."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="uri"/>
      </extension>
      <linkId value="ValueSet.url"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.url.value"/>
        <text value="Globally unique logical id for  value set"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="Formal identifier that is used to identify this value set when it is represented in other formats, or referenced in a specification, model, design or an instance. Typically, this is used for values that can go in a v3 II data type."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="Identifier"/>
      </extension>
      <linkId value="ValueSet.identifier"/>
      <text value="Additional identifier for the value set (v2 / CDA)"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.identifier.label"/>
        <text value="label:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
      <question>
        <linkId value="ValueSet.identifier.system"/>
        <text value="system:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
      <question>
        <linkId value="ValueSet.identifier.value"/>
        <text value="value:"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="The identifier that is used to identify this version of the value set when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the profile author manually and the value should be a timestamp. There may be multiple resource versions of the value set that have the same identifier."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="string"/>
      </extension>
      <linkId value="ValueSet.version"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.version.value"/>
        <text value="Logical id for this version of the value set"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="A free text natural language name describing the value set. The name is not expected to be unique. A name should be provided unless the value set is a contained resource (e.g. an anonymous value set in a profile). Most registries will require a name."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="string"/>
      </extension>
      <linkId value="ValueSet.name"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.name.value"/>
        <text value="Informal name for this value set"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="If this is set to &#39;true&#39;, then no new versions of the content logical definition can be created.  Note: Other metadata might still change. Normally immutability is set to &#39;false&#39;, which is the default assumption if it is not populated.  Note that the implication is that if this is set to &#39;true&#39;, there may be only one Value Set Version for this Definition. Immutability tends to be set to &#39;true&#39; in one of two cases:
- Where the value set, by the nature of its usage, cannot change.  For example &quot;All specializations of ACT in ActClassCode&quot;
- Where there&#39;s no safe way to express the &quot;Purpose&quot; such that someone else could safely make changes to the value set definition
Source workflow control must guarantee that the same URI always yields the same definition."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="boolean"/>
      </extension>
      <linkId value="ValueSet.immutable"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.immutable.value"/>
        <text value="Indicates whether or not any change to the content logical definition may occur"/>
        <type value="boolean"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="The name of the individual or organization that published the value set. Usually an organization, but may be an individual. This item SHOULD be populated unless the information is available from context."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="string"/>
      </extension>
      <linkId value="ValueSet.publisher"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.publisher.value"/>
        <text value="Name of the publisher (Organization or individual)"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="Contacts to assist a user in finding and communicating with the publisher."/>
      </extension>
      <linkId value="ValueSet.contact"/>
      <title value="Contact details of the publisher"/>
      <text value="May be a web site, an email address, a telephone number (tel:), etc."/>
      <required value="false"/>
      <repeats value="true"/>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="unique id for the element within a resource (for internal references)."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="string"/>
        </extension>
        <linkId value="ValueSet.contact.id"/>
        <required value="false"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.contact.id.value"/>
          <text value="xml:id (or equivalent in JSON)"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="The name of an individual to contact regarding the value set. If there is no named individual, the telecom is for the organization as a whole."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="string"/>
        </extension>
        <linkId value="ValueSet.contact.name"/>
        <required value="false"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.contact.name.value"/>
          <text value="Name of a individual to contact"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="Contact details for individual (if a name was provided) or the publisher."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="ContactPoint"/>
        </extension>
        <linkId value="ValueSet.contact.telecom"/>
        <text value="Contact details for individual or publisher"/>
        <required value="false"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.contact.telecom.system"/>
          <text value="type:"/>
          <type value="choice"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
        <question>
          <linkId value="ValueSet.contact.telecom.value"/>
          <text value="value:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
        <question>
          <linkId value="ValueSet.contact.telecom.use"/>
          <text value="use:"/>
          <type value="choice"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="A free text natural language description of the use of the value set - reason for definition, &quot;the semantic space&quot; to be included in the value set, conditions of use, etc. The description may include a list of expected usages for the value set and can also describe the approach taken to build the value set. The description is not intended to describe the semantics of the Value Set - there are no intrinsic semantics separate from the codes contained in its expansion. The description should capture its intended use, which is needed for ensuring integrity for its use in models across future changes. . A description should be provided unless the value set is a contained resource (e.g. an anonymous value set in a profile). Most registries will require a description."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="string"/>
      </extension>
      <linkId value="ValueSet.description"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.description.value"/>
        <text value="Human language description of the value set"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="Explains why this value set is needed and why it&#39;s been constrained as it has. This element does not describe the usage of the value set (that&#39;s done in comments), rather it&#39;s for traceability of *why* the element is either needed or why the constraints exist as they do.  This may be used to point to source materials or specifications that drove the structure of this data element."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="string"/>
      </extension>
      <linkId value="ValueSet.requirements"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.requirements.value"/>
        <text value="Why is this needed?"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="A copyright statement relating to the value set and/or its contents. Copyright statements are generally legal restrictions on the use and publishing of the value set. Frequently, the copyright differs between the value set, and codes that are included. The copyright statement should clearly differentiate between these when required."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="string"/>
      </extension>
      <linkId value="ValueSet.copyright"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.copyright.value"/>
        <text value="Use and/or Publishing restrictions"/>
        <type value="string"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="The status of the value set. Allows filtering of valuesets that are appropriate for use vs. not."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="code"/>
      </extension>
      <linkId value="ValueSet.status"/>
      <required value="true"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.status.value"/>
        <text value="status"/>
        <type value="choice"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="This valueset was authored for testing purposes (or education/evaluation/marketing), and is not intended to be used for genuine usage. Allows filtering of valuesets that are appropriate for use vs. not."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="boolean"/>
      </extension>
      <linkId value="ValueSet.experimental"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.experimental.value"/>
        <text value="If for testing purposes, not real usage"/>
        <type value="boolean"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="Whether this is intended to be used with an extensible binding or not."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="boolean"/>
      </extension>
      <linkId value="ValueSet.extensible"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.extensible.value"/>
        <text value="Whether this is intended to be used with an extensible binding"/>
        <type value="boolean"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="The date that the value set status was last changed. Note that this is not the same as the resource last-modified-date, since the resource may be a secondary representation of the value set."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="datetime"/>
      </extension>
      <linkId value="ValueSet.date"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.date.value"/>
        <text value="Date for given status"/>
        <type value="dateTime"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="If a Stability Date is expanded by evaluating the Content Logical Definition using the current version of all referenced code system(s) and value sets as of the Stability Date. With a defined Stability Date the value set is considered &quot;Static&quot;.  Otherwise, the value set is considered to be &quot;Dynamic&quot; and may have different expansions as underlying code systems and/or value sets evolve."/>
      </extension>
      <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
        <valueString value="datetime"/>
      </extension>
      <linkId value="ValueSet.stableDate"/>
      <required value="false"/>
      <repeats value="true"/>
      <question>
        <linkId value="ValueSet.stableDate.value"/>
        <text value="Fixed date for the version of all referenced code systems and value sets"/>
        <type value="dateTime"/>
        <required value="false"/>
        <repeats value="false"/>
      </question>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="When value set defines its own codes."/>
      </extension>
      <linkId value="ValueSet.define"/>
      <title value="When value set defines its own codes"/>
      <required value="false"/>
      <repeats value="false"/>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="unique id for the element within a resource (for internal references)."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="string"/>
        </extension>
        <linkId value="ValueSet.define.id"/>
        <required value="false"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.define.id.value"/>
          <text value="xml:id (or equivalent in JSON)"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="URI to identify the code system."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="uri"/>
        </extension>
        <linkId value="ValueSet.define.system"/>
        <required value="true"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.define.system.value"/>
          <text value="URI to identify the code system"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="The version of this code system that defines the codes. Note that the version is optional because a well maintained code system does not suffer from versioning, and therefore the version does not need to be maintained. However many code systems are not well maintained, and the version needs to be defined and tracked."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="string"/>
        </extension>
        <linkId value="ValueSet.define.version"/>
        <required value="false"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.define.version.value"/>
          <text value="Version of this system"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="If code comparison is case sensitive when codes within this system are compared to each other. If this value is missing, then it is not specified whether a code system is case sensitive or not. When the rule is not known, Postel&#39;s law should be followed: produce codes with the correct case, and accept codes in any case. This element is primarily provided to support validation software."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="boolean"/>
        </extension>
        <linkId value="ValueSet.define.caseSensitive"/>
        <required value="false"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.define.caseSensitive.value"/>
          <text value="If code comparison is case sensitive"/>
          <type value="boolean"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="Concepts in the code system."/>
        </extension>
        <linkId value="ValueSet.define.concept"/>
        <title value="Concepts in the code system"/>
        <required value="false"/>
        <repeats value="true"/>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="unique id for the element within a resource (for internal references)."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="string"/>
          </extension>
          <linkId value="ValueSet.define.concept.id"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.define.concept.id.value"/>
            <text value="xml:id (or equivalent in JSON)"/>
            <type value="string"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="Code that identifies concept."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="code"/>
          </extension>
          <linkId value="ValueSet.define.concept.code"/>
          <required value="true"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.define.concept.code.value"/>
            <text value="code"/>
            <type value="choice"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="If this code is not for use as a real concept."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="boolean"/>
          </extension>
          <linkId value="ValueSet.define.concept.abstract"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.define.concept.abstract.value"/>
            <text value="If this code is not for use as a real concept"/>
            <type value="boolean"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="Text to Display to the user."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="string"/>
          </extension>
          <linkId value="ValueSet.define.concept.display"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.define.concept.display.value"/>
            <text value="Text to Display to the user"/>
            <type value="string"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="The formal definition of the concept. Formal definitions are not required, because of the prevalence of legacy systems without them, but they are highly recommended, as without them there is no formal meaning associated with the concept."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="string"/>
          </extension>
          <linkId value="ValueSet.define.concept.definition"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.define.concept.definition.value"/>
            <text value="Formal Definition"/>
            <type value="string"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="Additional representations for the concept - other languages, aliases, specialised purposes, used for particular purposes, etc."/>
          </extension>
          <linkId value="ValueSet.define.concept.designation"/>
          <title value="Additional representations for the concept"/>
          <required value="false"/>
          <repeats value="true"/>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="unique id for the element within a resource (for internal references)."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="string"/>
            </extension>
            <linkId value="ValueSet.define.concept.designation.id"/>
            <required value="false"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.define.concept.designation.id.value"/>
              <text value="xml:id (or equivalent in JSON)"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="The language this designation is defined for. In the absense of a language, the resource language applies."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="code"/>
            </extension>
            <linkId value="ValueSet.define.concept.designation.language"/>
            <required value="false"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.define.concept.designation.language.value"/>
              <text value="language"/>
              <type value="choice"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="A code that details how this designation would be used. if no use is provided, the designation can be assumed to be suitable for general display to a human user."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="Coding"/>
            </extension>
            <linkId value="ValueSet.define.concept.designation.use"/>
            <required value="false"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.define.concept.designation.use.value"/>
              <text value="Details how this designation would be used"/>
              <type value="open-choice"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="The text value for this designation."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="string"/>
            </extension>
            <linkId value="ValueSet.define.concept.designation.value"/>
            <required value="true"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.define.concept.designation.value.value"/>
              <text value="The text value for this designation"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="Child Concepts (is-a / contains)."/>
          </extension>
          <linkId value="ValueSet.define.concept.concept"/>
          <title value="Child Concepts (is-a / contains)"/>
          <required value="false"/>
          <repeats value="true"/>
        </group>
      </group>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="When value set includes codes from elsewhere."/>
      </extension>
      <linkId value="ValueSet.compose"/>
      <title value="When value set includes codes from elsewhere"/>
      <required value="false"/>
      <repeats value="false"/>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="unique id for the element within a resource (for internal references)."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="string"/>
        </extension>
        <linkId value="ValueSet.compose.id"/>
        <required value="false"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.compose.id.value"/>
          <text value="xml:id (or equivalent in JSON)"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="Includes the contents of the referenced value set as a part of the contents of this value set. The value set URI is either a logical reference to a defined value set such as a SNOMED CT reference set, or a literal reference to a value set definition (not an expansion). If the reference is a logical one, it may not reference a actual FHIR value set resource; in this case, the referenced definition of a set of coded values needs to be clear about how versions are resolved."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="uri"/>
        </extension>
        <linkId value="ValueSet.compose.import"/>
        <required value="false"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.compose.import.value"/>
          <text value="Import the contents of another value set"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="Include one or more codes from a code system."/>
        </extension>
        <linkId value="ValueSet.compose.include"/>
        <title value="Include one or more codes from a code system"/>
        <text value="If there are no codes or filters, the entire code system is included. Note that the set of codes hat are included may contain abstract codes."/>
        <required value="false"/>
        <repeats value="true"/>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="unique id for the element within a resource (for internal references)."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="string"/>
          </extension>
          <linkId value="ValueSet.compose.include.id"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.compose.include.id.value"/>
            <text value="xml:id (or equivalent in JSON)"/>
            <type value="string"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="The code system from which the selected codes come from. See *Coding.system* for further documentation."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="uri"/>
          </extension>
          <linkId value="ValueSet.compose.include.system"/>
          <required value="true"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.compose.include.system.value"/>
            <text value="The system the codes come from"/>
            <type value="string"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="The version of the code system that the codes are selected from. This is used when selecting the descendents of a concept - they may change between versions. If no version is specified, then the exact contents of the value set may not be known until a context of use binds it to a particular version."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="string"/>
          </extension>
          <linkId value="ValueSet.compose.include.version"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.compose.include.version.value"/>
            <text value="Specific version of the code system referred to"/>
            <type value="string"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="Specifies a concept to be included or excluded."/>
          </extension>
          <linkId value="ValueSet.compose.include.concept"/>
          <title value="A concept defined in the system"/>
          <text value="The list of concepts is considered ordered, though the order may not have any particular significance. Typically, the order an an expansion follows that defined in the compose."/>
          <required value="false"/>
          <repeats value="true"/>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="unique id for the element within a resource (for internal references)."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="string"/>
            </extension>
            <linkId value="ValueSet.compose.include.concept.id"/>
            <required value="false"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.compose.include.concept.id.value"/>
              <text value="xml:id (or equivalent in JSON)"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="Specifies a code for the concept to be included or excluded. Expressions are allowed if defined by the underlying code system."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="code"/>
            </extension>
            <linkId value="ValueSet.compose.include.concept.code"/>
            <required value="true"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.compose.include.concept.code.value"/>
              <text value="code"/>
              <type value="choice"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="The text to display to the user for this concept in the context of this valueset. If no display is provided, then applications using the value set use the display specified for the code by the system. The value set resource allows for an alternative display to be specified for when this concept is used in this particular value set. See notes in the value set narrative about the correct use of this element."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="string"/>
            </extension>
            <linkId value="ValueSet.compose.include.concept.display"/>
            <required value="false"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.compose.include.concept.display.value"/>
              <text value="Test to display for this code for this value set"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="Additional representations for this concept when used in this value set - other languages, aliases, specialised purposes, used for particular purposes, etc."/>
            </extension>
            <linkId value="ValueSet.compose.include.concept.designation"/>
            <title value="Additional representations for this valueset"/>
            <required value="false"/>
            <repeats value="true"/>
          </group>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="Select concepts by specify a matching criteria based on the properties (including relationships) defined by the system. If multiple filters are specified, they SHALL all be true."/>
          </extension>
          <linkId value="ValueSet.compose.include.filter"/>
          <title value="Select codes/concepts by their properties (including relationships)"/>
          <text value="Selecting codes by specifying filters based on properties is only possible where the underlying code system defines appropriate properties. Note that in some cases, the underlying code system defines the logical concepts but not the literal codes for the concepts. In such cases, the literal definitions may be provided by a third party."/>
          <required value="false"/>
          <repeats value="true"/>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="unique id for the element within a resource (for internal references)."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="string"/>
            </extension>
            <linkId value="ValueSet.compose.include.filter.id"/>
            <required value="false"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.compose.include.filter.id.value"/>
              <text value="xml:id (or equivalent in JSON)"/>
              <type value="string"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="A code that identifies a property defined in the code system."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="code"/>
            </extension>
            <linkId value="ValueSet.compose.include.filter.property"/>
            <required value="true"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.compose.include.filter.property.value"/>
              <text value="property"/>
              <type value="choice"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="The kind of operation to perform as a part of the filter criteria."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="code"/>
            </extension>
            <linkId value="ValueSet.compose.include.filter.op"/>
            <required value="true"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.compose.include.filter.op.value"/>
              <text value="op"/>
              <type value="choice"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
          <group>
            <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
              <valueString value="The match value may be either a code defined by the system, or a string value which is used a regex match on the literal string of the property value. Use regex matching with care - full regex matching on every SNOMED CT term is prohibitive, for example."/>
            </extension>
            <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
              <valueString value="code"/>
            </extension>
            <linkId value="ValueSet.compose.include.filter.value"/>
            <required value="true"/>
            <repeats value="true"/>
            <question>
              <linkId value="ValueSet.compose.include.filter.value.value"/>
              <text value="value"/>
              <type value="choice"/>
              <required value="false"/>
              <repeats value="false"/>
            </question>
          </group>
        </group>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="Exclude one or more codes from the value set."/>
        </extension>
        <linkId value="ValueSet.compose.exclude"/>
        <title value="Explicitly exclude codes"/>
        <text value="Usually this is used to selectively exclude codes that were included by subsumption in the inclusions. Any display names specified for the codes are ignored."/>
        <required value="false"/>
        <repeats value="true"/>
      </group>
    </group>
    <group>
      <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
        <valueString value="A value set can also be &quot;expanded&quot;, where the value set is turned into a simple collection of enumerated codes. This element holds the expansion, if it has been performed."/>
      </extension>
      <linkId value="ValueSet.expansion"/>
      <title value="Used when the value set is &quot;expanded&quot;"/>
      <text value="Expansion is performed to produce a collection of codes that are ready to use for data entry or validation."/>
      <required value="false"/>
      <repeats value="false"/>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="unique id for the element within a resource (for internal references)."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="string"/>
        </extension>
        <linkId value="ValueSet.expansion.id"/>
        <required value="false"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.expansion.id.value"/>
          <text value="xml:id (or equivalent in JSON)"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="An identifier that uniquely identifies this expansion of the valueset. Systems may re-use the same identifier as long as the expansion and the definition remain the same, but are not required to do so."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="Identifier"/>
        </extension>
        <linkId value="ValueSet.expansion.identifier"/>
        <text value="Uniquely identifies this expansion"/>
        <required value="false"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.expansion.identifier.label"/>
          <text value="label:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
        <question>
          <linkId value="ValueSet.expansion.identifier.system"/>
          <text value="system:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
        <question>
          <linkId value="ValueSet.expansion.identifier.value"/>
          <text value="value:"/>
          <type value="string"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="The time at which the expansion was produced by the expanding system. This SHOULD have be a fully populated instant, but in some circumstances, value sets are expanded by hand, of the expansion is published without that precision."/>
        </extension>
        <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
          <valueString value="datetime"/>
        </extension>
        <linkId value="ValueSet.expansion.timestamp"/>
        <required value="true"/>
        <repeats value="true"/>
        <question>
          <linkId value="ValueSet.expansion.timestamp.value"/>
          <text value="Time valueset expansion happened"/>
          <type value="dateTime"/>
          <required value="false"/>
          <repeats value="false"/>
        </question>
      </group>
      <group>
        <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
          <valueString value="The codes that are contained in the value set expansion."/>
        </extension>
        <linkId value="ValueSet.expansion.contains"/>
        <title value="Codes in the value set"/>
        <required value="false"/>
        <repeats value="true"/>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="unique id for the element within a resource (for internal references)."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="string"/>
          </extension>
          <linkId value="ValueSet.expansion.contains.id"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.expansion.contains.id.value"/>
            <text value="xml:id (or equivalent in JSON)"/>
            <type value="string"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="The system in which the code for this item in the expansion is defined."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="uri"/>
          </extension>
          <linkId value="ValueSet.expansion.contains.system"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.expansion.contains.system.value"/>
            <text value="System value for the code"/>
            <type value="string"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="If true, this entry is included in the expansion for navigational purposes, and the user cannot select the code directly as a proper value. This shouldn&#39;t be understood to exclude its use for searchig (e..g by subsumption testing). The client should know whether it is appropriate for the user to select an abstract code or not."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="boolean"/>
          </extension>
          <linkId value="ValueSet.expansion.contains.abstract"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.expansion.contains.abstract.value"/>
            <text value="If user cannot select this entry"/>
            <type value="boolean"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="The version of this code system that defined this code and/or display. This should only be used with code systems that do not enforce concept permanence. The exact value of the version string is specified by the system from which the code is derived."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="string"/>
          </extension>
          <linkId value="ValueSet.expansion.contains.version"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.expansion.contains.version.value"/>
            <text value="Version in which this code / display is defined"/>
            <type value="string"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="Code - if blank, this is not a choosable code."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="code"/>
          </extension>
          <linkId value="ValueSet.expansion.contains.code"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.expansion.contains.code.value"/>
            <text value="code"/>
            <type value="choice"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="User display for the concept."/>
          </extension>
          <extension url="http://www.healthintersections.com.au/fhir/Profile/metadata#type">
            <valueString value="string"/>
          </extension>
          <linkId value="ValueSet.expansion.contains.display"/>
          <required value="false"/>
          <repeats value="true"/>
          <question>
            <linkId value="ValueSet.expansion.contains.display.value"/>
            <text value="User display for the concept"/>
            <type value="string"/>
            <required value="false"/>
            <repeats value="false"/>
          </question>
        </group>
        <group>
          <extension url="http://hl7.org/fhir/Profile/questionnaire-extensions#flyover">
            <valueString value="Codes contained in this concept."/>
          </extension>
          <linkId value="ValueSet.expansion.contains.contains"/>
          <title value="Codes contained in this concept"/>
          <required value="false"/>
          <repeats value="true"/>
        </group>
      </group>
    </group>
  </group>
</Questionnaire>

Usage note: every effort has been made to ensure that the examples are correct and useful, but they are not a normative part of the specification.