Koppelmij Implementation Guide
0.1.0 - ci-build
Koppelmij Implementation Guide - Local Development build (v0.1.0) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions
| Active as of 2026-05-08 |
XML representation of the pt-lm-Task logical model.
<StructureDefinition xmlns="http://hl7.org/fhir">
<id value="pt-lm-Task"/>
<text>
<status value="empty"/>
<div xmlns="http://www.w3.org/1999/xhtml">No narrative is provided for definitional resources. A human-readable rendering can be found in the implementation guide(s) where this resource is used.</div>
</text>
<url value="http://medmij.nl/fhir/StructureDefinition/pt-lm-Task"/>
<version value="0.1.0"/>
<name value="LmTask"/>
<title value="Task"/>
<status value="active"/>
<date value="2026-05-08T08:30:17+00:00"/>
<publisher value="koppelmij"/>
<contact>
<name value="koppelmij"/>
<telecom>
<system value="url"/>
<value value="https://github.com/KoppelMij/"/>
</telecom>
</contact>
<description
value="Patient-specific workflow item that requests execution of a defined digital (eHealth) activity. Each Task represents an instance of “perform this activity for this patient”, optionally linking to an ActivityDefinition that describes the launchable activity."/>
<purpose
value="To represent and manage a concrete patient-specific request to perform a digital (eHealth) activity. The Task supports assignment, handover, and status tracking between systems and roles, so that initiation and completion of the activity can be monitored within the care process. The Task can be used in both MedMij and Koppeltaal implementations (client applications such as a PGO are one possible presentation layer)."/>
<copyright
value="Copyright and related rights waived via CC0, https://creativecommons.org/publicdomain/zero/1.0/. This does not apply to information from third parties, for example a medical terminology system. The implementer alone is responsible for identifying and obtaining any necessary licenses or authorizations to utilize third party IP in connection with the specification or otherwise."/>
<fhirVersion value="4.0.1"/>
<mapping>
<identity value="rim"/>
<uri value="http://hl7.org/v3"/>
<name value="RIM Mapping"/>
</mapping>
<kind value="logical"/>
<abstract value="true"/>
<type value="http://medmij.nl/fhir/StructureDefinition/pt-lm-Task"/>
<baseDefinition value="http://hl7.org/fhir/StructureDefinition/Element"/>
<derivation value="specialization"/>
<snapshot>
<extension
url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version">
<valueString value="4.0.1"/>
</extension>
<element id="pt-lm-Task">
<path value="pt-lm-Task"/>
<short value="Task"/>
<definition
value="Patient-specific workflow item that requests execution of a defined digital (eHealth) activity. Each Task represents an instance of “perform this activity for this patient”, optionally linking to an ActivityDefinition that describes the launchable activity."/>
<alias value="Taken"/>
<min value="0"/>
<max value="*"/>
<base>
<path value="Element"/>
<min value="0"/>
<max value="*"/>
</base>
<condition value="ele-1"/>
<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() > id.count())"/>
<xpath value="@value|f:*|h:div"/>
<source value="http://hl7.org/fhir/StructureDefinition/Element"/>
</constraint>
<isModifier value="false"/>
<mapping>
<identity value="rim"/>
<map value="n/a"/>
</mapping>
</element>
<element id="pt-lm-Task.id">
<path value="pt-lm-Task.id"/>
<representation value="xmlAttr"/>
<short value="Unique id for inter-element referencing"/>
<definition
value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
<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"/>
<mapping>
<identity value="rim"/>
<map value="n/a"/>
</mapping>
</element>
<element id="pt-lm-Task.extension">
<path value="pt-lm-Task.extension"/>
<slicing>
<discriminator>
<type value="value"/>
<path value="url"/>
</discriminator>
<description value="Extensions are always sliced by (at least) url"/>
<rules value="open"/>
</slicing>
<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 element. 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() > 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(.), "value")])"/>
<source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
</constraint>
<isModifier value="false"/>
<isSummary value="false"/>
<mapping>
<identity value="rim"/>
<map value="n/a"/>
</mapping>
</element>
<element id="pt-lm-Task.Instantiates">
<path value="pt-lm-Task.Instantiates"/>
<short value="Instantiates ActivityDefinition"/>
<definition
value="A link to the ActivityDefinition that defines the launchable eHealth activity (i.e., what module/content should be launched or performed) associated with this Task. In both MedMij and Koppeltaal implementations, this link is carried using the Koppeltaal instantiates extension."/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Instantiates"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="BackboneElement"/>
</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() > id.count())"/>
<xpath value="@value|f:*|h:div"/>
<source value="http://hl7.org/fhir/StructureDefinition/Element"/>
</constraint>
</element>
<element id="pt-lm-Task.Instantiates.id">
<path value="pt-lm-Task.Instantiates.id"/>
<representation value="xmlAttr"/>
<short value="Unique id for inter-element referencing"/>
<definition
value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
<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"/>
<mapping>
<identity value="rim"/>
<map value="n/a"/>
</mapping>
</element>
<element id="pt-lm-Task.Instantiates.extension">
<path value="pt-lm-Task.Instantiates.extension"/>
<slicing>
<discriminator>
<type value="value"/>
<path value="url"/>
</discriminator>
<description value="Extensions are always sliced by (at least) url"/>
<rules value="open"/>
</slicing>
<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 element. 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() > 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(.), "value")])"/>
<source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
</constraint>
<isModifier value="false"/>
<isSummary value="false"/>
<mapping>
<identity value="rim"/>
<map value="n/a"/>
</mapping>
</element>
<element id="pt-lm-Task.Instantiates.modifierExtension">
<path value="pt-lm-Task.Instantiates.modifierExtension"/>
<short value="Extensions that cannot be ignored even if unrecognized"/>
<definition
value="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 in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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. Applications processing a resource are required to check for modifier extensions.
Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
<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."/>
<requirements
value="Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension)."/>
<alias value="extensions"/>
<alias value="user content"/>
<alias value="modifiers"/>
<min value="0"/>
<max value="*"/>
<base>
<path value="BackboneElement.modifierExtension"/>
<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() > 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(.), "value")])"/>
<source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
</constraint>
<isModifier value="true"/>
<isModifierReason
value="Modifier extensions are expected to modify the meaning or interpretation of the element that contains them"/>
<isSummary value="true"/>
<mapping>
<identity value="rim"/>
<map value="N/A"/>
</mapping>
</element>
<element id="pt-lm-Task.Instantiates.ActivityDefinition">
<path value="pt-lm-Task.Instantiates.ActivityDefinition"/>
<short
value="Reference to the ActivityDefinition that describes the activity to launch/perform."/>
<definition
value="Reference to the ActivityDefinition that describes the activity to launch/perform."/>
<alias value="ActivityDefinition"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Instantiates.ActivityDefinition"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/ActivityDefinition"/>
</type>
</element>
<element id="pt-lm-Task.Identifier">
<path value="pt-lm-Task.Identifier"/>
<short
value="Business identifier that uniquely identifies this Task instance within or across systems."/>
<definition
value="Business identifier that uniquely identifies this Task instance within or across systems."/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Identifier"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="Identifier"/>
</type>
</element>
<element id="pt-lm-Task.GroupIdentifier">
<path value="pt-lm-Task.GroupIdentifier"/>
<short
value="Identifier used to group related tasks (e.g., tasks belonging to the same digital care module/program)."/>
<definition
value="Identifier used to group related tasks (e.g., tasks belonging to the same digital care module/program)."/>
<alias value="GroepIdentifier"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.GroupIdentifier"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="Identifier"/>
</type>
</element>
<element id="pt-lm-Task.BasedOn">
<path value="pt-lm-Task.BasedOn"/>
<short
value="Order(s) on which this Task is based. Typically a ServiceRequest represents the clinical order that triggered this patient-facing activity, and it may also carry patient-specific instructions for the activity (e.g., via ServiceRequest.patientInstruction)."/>
<definition
value="Order(s) on which this Task is based. Typically a ServiceRequest represents the clinical order that triggered this patient-facing activity, and it may also carry patient-specific instructions for the activity (e.g., via ServiceRequest.patientInstruction)."/>
<alias value="GebaseerdOp"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.BasedOn"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/ServiceRequest"/>
</type>
</element>
<element id="pt-lm-Task.PartOf">
<path value="pt-lm-Task.PartOf"/>
<short
value="Parent task of which this task is a part. Used to link subtasks (e.g., individual measurement moments) to a main task."/>
<definition
value="Parent task of which this task is a part. Used to link subtasks (e.g., individual measurement moments) to a main task."/>
<alias value="SubTaak"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.PartOf"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="Reference"/>
<targetProfile value="http://hl7.org/fhir/StructureDefinition/Task"/>
</type>
</element>
<element id="pt-lm-Task.Status">
<path value="pt-lm-Task.Status"/>
<short
value="Current state of the Task in the workflow (e.g., requested, received, accepted, in-progress, completed, cancelled)."/>
<definition
value="Current state of the Task in the workflow (e.g., requested, received, accepted, in-progress, completed, cancelled)."/>
<alias value="TaakStatus"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Status"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="code"/>
</type>
</element>
<element id="pt-lm-Task.Intent">
<path value="pt-lm-Task.Intent"/>
<short
value="Indicates whether the Task is a proposal, plan, or order. For patient-facing activities this will typically be an order."/>
<definition
value="Indicates whether the Task is a proposal, plan, or order. For patient-facing activities this will typically be an order."/>
<alias value="Bedoeling"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Intent"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="code"/>
</type>
</element>
<element id="pt-lm-Task.Priority">
<path value="pt-lm-Task.Priority"/>
<short
value="Indicates how urgent it is to perform the activity (e.g., routine, urgent, asap)."/>
<definition
value="Indicates how urgent it is to perform the activity (e.g., routine, urgent, asap)."/>
<alias value="TaakPrioriteit"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Priority"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="code"/>
</type>
</element>
<element id="pt-lm-Task.Description">
<path value="pt-lm-Task.Description"/>
<short
value="Short, human-readable description of what should be done. Keep the text concise and readable on mobile applications."/>
<definition
value="Short, human-readable description of what should be done. Keep the text concise and readable on mobile applications."/>
<alias value="TaakOmschrijving"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Description"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="string"/>
</type>
</element>
<element id="pt-lm-Task.For">
<path value="pt-lm-Task.For"/>
<short value="The patient for whom the Task is intended."/>
<definition value="The patient for whom the Task is intended."/>
<alias value="Voor"/>
<min value="1"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.For"/>
<min value="1"/>
<max value="1"/>
</base>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/Patient"/>
</type>
</element>
<element id="pt-lm-Task.ExecutionPeriod">
<path value="pt-lm-Task.ExecutionPeriod"/>
<short
value="Time window in which the Task is expected or allowed to be performed (start/end)."/>
<definition
value="Time window in which the Task is expected or allowed to be performed (start/end)."/>
<alias value="Periode"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.ExecutionPeriod"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="Period"/>
</type>
</element>
<element id="pt-lm-Task.AuthoredOn">
<path value="pt-lm-Task.AuthoredOn"/>
<short value="Date and time when the Task was created."/>
<definition value="Date and time when the Task was created."/>
<alias value="AanmaakDatumTijd"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.AuthoredOn"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="dateTime"/>
</type>
</element>
<element id="pt-lm-Task.LastModified">
<path value="pt-lm-Task.LastModified"/>
<short
value="Date and time when the Task was last updated (e.g., after status change, edits, or reassignment)."/>
<definition
value="Date and time when the Task was last updated (e.g., after status change, edits, or reassignment)."/>
<alias value="LaatstGewijzigd"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.LastModified"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="dateTime"/>
</type>
</element>
<element id="pt-lm-Task.Requester">
<path value="pt-lm-Task.Requester"/>
<short
value="The person or role who requested or initiated this Task."/>
<definition
value="The person or role who requested or initiated this Task."/>
<alias value="Aanvrager"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Requester"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/PractitionerRole"/>
</type>
</element>
<element id="pt-lm-Task.Owner">
<path value="pt-lm-Task.Owner"/>
<short value="The actor currently responsible for performing the Task"/>
<definition
value="The actor currently responsible for performing the Task"/>
<alias value="TaakEigenaar"/>
<min value="1"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Owner"/>
<min value="1"/>
<max value="1"/>
</base>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/Patient"/>
</type>
</element>
<element id="pt-lm-Task.Restriction">
<path value="pt-lm-Task.Restriction"/>
<short
value="Constraints on performing this Task, such as how many times it may be executed, within which period, and by which intended performers."/>
<definition
value="Constraints on performing this Task, such as how many times it may be executed, within which period, and by which intended performers."/>
<alias value="Frequentie"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Restriction"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="BackboneElement"/>
</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() > id.count())"/>
<xpath value="@value|f:*|h:div"/>
<source value="http://hl7.org/fhir/StructureDefinition/Element"/>
</constraint>
</element>
<element id="pt-lm-Task.Restriction.id">
<path value="pt-lm-Task.Restriction.id"/>
<representation value="xmlAttr"/>
<short value="Unique id for inter-element referencing"/>
<definition
value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
<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"/>
<mapping>
<identity value="rim"/>
<map value="n/a"/>
</mapping>
</element>
<element id="pt-lm-Task.Restriction.extension">
<path value="pt-lm-Task.Restriction.extension"/>
<slicing>
<discriminator>
<type value="value"/>
<path value="url"/>
</discriminator>
<description value="Extensions are always sliced by (at least) url"/>
<rules value="open"/>
</slicing>
<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 element. 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() > 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(.), "value")])"/>
<source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
</constraint>
<isModifier value="false"/>
<isSummary value="false"/>
<mapping>
<identity value="rim"/>
<map value="n/a"/>
</mapping>
</element>
<element id="pt-lm-Task.Restriction.modifierExtension">
<path value="pt-lm-Task.Restriction.modifierExtension"/>
<short value="Extensions that cannot be ignored even if unrecognized"/>
<definition
value="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 in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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. Applications processing a resource are required to check for modifier extensions.
Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
<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."/>
<requirements
value="Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored. This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension)."/>
<alias value="extensions"/>
<alias value="user content"/>
<alias value="modifiers"/>
<min value="0"/>
<max value="*"/>
<base>
<path value="BackboneElement.modifierExtension"/>
<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() > 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(.), "value")])"/>
<source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
</constraint>
<isModifier value="true"/>
<isModifierReason
value="Modifier extensions are expected to modify the meaning or interpretation of the element that contains them"/>
<isSummary value="true"/>
<mapping>
<identity value="rim"/>
<map value="N/A"/>
</mapping>
</element>
<element id="pt-lm-Task.Restriction.Repetitions">
<path value="pt-lm-Task.Restriction.Repetitions"/>
<short value="How many times to repeat"/>
<definition value="How many times to repeat"/>
<alias value="Herhaling"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Restriction.Repetitions"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="positiveInt"/>
</type>
</element>
<element id="pt-lm-Task.Restriction.Period">
<path value="pt-lm-Task.Restriction.Period"/>
<short
value="Time window during which this Task restriction applies. For example the period in which the task may be performed."/>
<definition
value="Time window during which this Task restriction applies. For example the period in which the task may be performed."/>
<alias value="GeldigBinnen"/>
<min value="0"/>
<max value="1"/>
<base>
<path value="pt-lm-Task.Restriction.Period"/>
<min value="0"/>
<max value="1"/>
</base>
<type>
<code value="Period"/>
</type>
</element>
</snapshot>
<differential>
<element id="pt-lm-Task">
<path value="pt-lm-Task"/>
<short value="Task"/>
<definition
value="Patient-specific workflow item that requests execution of a defined digital (eHealth) activity. Each Task represents an instance of “perform this activity for this patient”, optionally linking to an ActivityDefinition that describes the launchable activity."/>
<alias value="Taken"/>
</element>
<element id="pt-lm-Task.Instantiates">
<path value="pt-lm-Task.Instantiates"/>
<short value="Instantiates ActivityDefinition"/>
<definition
value="A link to the ActivityDefinition that defines the launchable eHealth activity (i.e., what module/content should be launched or performed) associated with this Task. In both MedMij and Koppeltaal implementations, this link is carried using the Koppeltaal instantiates extension."/>
<min value="0"/>
<max value="1"/>
<type>
<code value="BackboneElement"/>
</type>
</element>
<element id="pt-lm-Task.Instantiates.ActivityDefinition">
<path value="pt-lm-Task.Instantiates.ActivityDefinition"/>
<short
value="Reference to the ActivityDefinition that describes the activity to launch/perform."/>
<definition
value="Reference to the ActivityDefinition that describes the activity to launch/perform."/>
<alias value="ActivityDefinition"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/ActivityDefinition"/>
</type>
</element>
<element id="pt-lm-Task.Identifier">
<path value="pt-lm-Task.Identifier"/>
<short
value="Business identifier that uniquely identifies this Task instance within or across systems."/>
<definition
value="Business identifier that uniquely identifies this Task instance within or across systems."/>
<min value="0"/>
<max value="1"/>
<type>
<code value="Identifier"/>
</type>
</element>
<element id="pt-lm-Task.GroupIdentifier">
<path value="pt-lm-Task.GroupIdentifier"/>
<short
value="Identifier used to group related tasks (e.g., tasks belonging to the same digital care module/program)."/>
<definition
value="Identifier used to group related tasks (e.g., tasks belonging to the same digital care module/program)."/>
<alias value="GroepIdentifier"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="Identifier"/>
</type>
</element>
<element id="pt-lm-Task.BasedOn">
<path value="pt-lm-Task.BasedOn"/>
<short
value="Order(s) on which this Task is based. Typically a ServiceRequest represents the clinical order that triggered this patient-facing activity, and it may also carry patient-specific instructions for the activity (e.g., via ServiceRequest.patientInstruction)."/>
<definition
value="Order(s) on which this Task is based. Typically a ServiceRequest represents the clinical order that triggered this patient-facing activity, and it may also carry patient-specific instructions for the activity (e.g., via ServiceRequest.patientInstruction)."/>
<alias value="GebaseerdOp"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/ServiceRequest"/>
</type>
</element>
<element id="pt-lm-Task.PartOf">
<path value="pt-lm-Task.PartOf"/>
<short
value="Parent task of which this task is a part. Used to link subtasks (e.g., individual measurement moments) to a main task."/>
<definition
value="Parent task of which this task is a part. Used to link subtasks (e.g., individual measurement moments) to a main task."/>
<alias value="SubTaak"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="Reference"/>
<targetProfile value="http://hl7.org/fhir/StructureDefinition/Task"/>
</type>
</element>
<element id="pt-lm-Task.Status">
<path value="pt-lm-Task.Status"/>
<short
value="Current state of the Task in the workflow (e.g., requested, received, accepted, in-progress, completed, cancelled)."/>
<definition
value="Current state of the Task in the workflow (e.g., requested, received, accepted, in-progress, completed, cancelled)."/>
<alias value="TaakStatus"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="code"/>
</type>
</element>
<element id="pt-lm-Task.Intent">
<path value="pt-lm-Task.Intent"/>
<short
value="Indicates whether the Task is a proposal, plan, or order. For patient-facing activities this will typically be an order."/>
<definition
value="Indicates whether the Task is a proposal, plan, or order. For patient-facing activities this will typically be an order."/>
<alias value="Bedoeling"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="code"/>
</type>
</element>
<element id="pt-lm-Task.Priority">
<path value="pt-lm-Task.Priority"/>
<short
value="Indicates how urgent it is to perform the activity (e.g., routine, urgent, asap)."/>
<definition
value="Indicates how urgent it is to perform the activity (e.g., routine, urgent, asap)."/>
<alias value="TaakPrioriteit"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="code"/>
</type>
</element>
<element id="pt-lm-Task.Description">
<path value="pt-lm-Task.Description"/>
<short
value="Short, human-readable description of what should be done. Keep the text concise and readable on mobile applications."/>
<definition
value="Short, human-readable description of what should be done. Keep the text concise and readable on mobile applications."/>
<alias value="TaakOmschrijving"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="string"/>
</type>
</element>
<element id="pt-lm-Task.For">
<path value="pt-lm-Task.For"/>
<short value="The patient for whom the Task is intended."/>
<definition value="The patient for whom the Task is intended."/>
<alias value="Voor"/>
<min value="1"/>
<max value="1"/>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/Patient"/>
</type>
</element>
<element id="pt-lm-Task.ExecutionPeriod">
<path value="pt-lm-Task.ExecutionPeriod"/>
<short
value="Time window in which the Task is expected or allowed to be performed (start/end)."/>
<definition
value="Time window in which the Task is expected or allowed to be performed (start/end)."/>
<alias value="Periode"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="Period"/>
</type>
</element>
<element id="pt-lm-Task.AuthoredOn">
<path value="pt-lm-Task.AuthoredOn"/>
<short value="Date and time when the Task was created."/>
<definition value="Date and time when the Task was created."/>
<alias value="AanmaakDatumTijd"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="dateTime"/>
</type>
</element>
<element id="pt-lm-Task.LastModified">
<path value="pt-lm-Task.LastModified"/>
<short
value="Date and time when the Task was last updated (e.g., after status change, edits, or reassignment)."/>
<definition
value="Date and time when the Task was last updated (e.g., after status change, edits, or reassignment)."/>
<alias value="LaatstGewijzigd"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="dateTime"/>
</type>
</element>
<element id="pt-lm-Task.Requester">
<path value="pt-lm-Task.Requester"/>
<short
value="The person or role who requested or initiated this Task."/>
<definition
value="The person or role who requested or initiated this Task."/>
<alias value="Aanvrager"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/PractitionerRole"/>
</type>
</element>
<element id="pt-lm-Task.Owner">
<path value="pt-lm-Task.Owner"/>
<short value="The actor currently responsible for performing the Task"/>
<definition
value="The actor currently responsible for performing the Task"/>
<alias value="TaakEigenaar"/>
<min value="1"/>
<max value="1"/>
<type>
<code value="Reference"/>
<targetProfile
value="http://hl7.org/fhir/StructureDefinition/Patient"/>
</type>
</element>
<element id="pt-lm-Task.Restriction">
<path value="pt-lm-Task.Restriction"/>
<short
value="Constraints on performing this Task, such as how many times it may be executed, within which period, and by which intended performers."/>
<definition
value="Constraints on performing this Task, such as how many times it may be executed, within which period, and by which intended performers."/>
<alias value="Frequentie"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="BackboneElement"/>
</type>
</element>
<element id="pt-lm-Task.Restriction.Repetitions">
<path value="pt-lm-Task.Restriction.Repetitions"/>
<short value="How many times to repeat"/>
<definition value="How many times to repeat"/>
<alias value="Herhaling"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="positiveInt"/>
</type>
</element>
<element id="pt-lm-Task.Restriction.Period">
<path value="pt-lm-Task.Restriction.Period"/>
<short
value="Time window during which this Task restriction applies. For example the period in which the task may be performed."/>
<definition
value="Time window during which this Task restriction applies. For example the period in which the task may be performed."/>
<alias value="GeldigBinnen"/>
<min value="0"/>
<max value="1"/>
<type>
<code value="Period"/>
</type>
</element>
</differential>
</StructureDefinition>