Please note:

This version of the UK Core is a development copy.
This contains BREAKING CHANGES as a result of the C&TA Sprint 7 Review, and STU2 Sequence ballot reconciliation.
This version is not yet reviewed for implementation. Other versions are available on the UK Core Version History Guide
Please follow the guidance on the Contact Us page if you need any assistance.
A summary of changes is available on the STU3 Sequence Change Log

StructureDefinition UKCore-Slot

Canonical_URL	Status	Current_Version	Last_Updated	Description
https://fhir.hl7.org.uk/StructureDefinition/UKCore-Slot	active	1.3.0	2023-12-12	This profile defines the UK constraints and extensions on the International FHIR resource Slot.

Profile_Purpose
Slot resources are used to provide time-slots that can be booked using an appointment. They do not provide any information about appointments that are available, just the time, and optionally what the time can be used for. These are effectively spaces of free/busy time. Slots can also be marked as busy without having appointments associated.

UKCoreSlot (Slot)	I		Slot	There are no (further) constraints on this element Element id Slot Short description A slot of time on a schedule that may be available for booking appointments Definition A slot of time on a schedule that may be available for booking appointments. Data type Slot Constraints dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources `contained.contained.empty()` dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated `contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()` dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource `contained.where((('#'+id in (%resource.descendants().reference \| %resource.descendants().as(canonical) \| %resource.descendants().as(uri) \| %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()` dom-6: A resource should have narrative for robust management text.`div`.exists() dom-5: If a resource is contained in another resource, it SHALL NOT have a security label `contained.meta.security.empty()` Mappings rim: Entity. Role, or Act rim: n/a ical: (refer to the Availability resource for the header mapping details)
id	Σ	0..1	string	There are no (further) constraints on this element Element id Slot.id Short description Logical id of this artifact Definition The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes. Comments The only time that a resource does not have an id is when it is being submitted to the server using a create operation. Data type string
meta	Σ	0..1	Meta	There are no (further) constraints on this element Element id Slot.meta Short description Metadata about the resource Definition The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource. Data type Meta Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: N/A
implicitRules	Σ ?!	0..1	uri	There are no (further) constraints on this element Element id Slot.implicitRules Short description A set of rules under which this content was created Definition A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc. Comments 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. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
language		0..1	codeBinding	There are no (further) constraints on this element Element id Slot.language Short description Language of the resource content Definition The base language in which the resource is written. Comments 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). Data type code Binding A human language. CommonLanguages (preferred) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
text		0..1	Narrative	There are no (further) constraints on this element Element id Slot.text Short description Text summary of the resource, for human interpretation Alternate names narrative, html, xhtml, display Definition A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety. Comments Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded information is added later. Data type Narrative Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a rim: N/A rim: Act.text?
contained		0..*	Resource	There are no (further) constraints on this element Element id Slot.contained Short description Contained, inline Resources Alternate names inline resources, anonymous resources, contained resources Definition 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. Comments 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. Contained resources may have profiles and tags In their meta elements, but SHALL NOT have security labels. Data type Resource Mappings rim: Entity. Role, or Act rim: N/A
extension	I	0..*	Extension	There are no (further) constraints on this element Element id Slot.extension Short description Additional content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments 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. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
deliveryChannel	I	0..1	Extension(CodeableConcept)	Element id Slot.extension:deliveryChannel Short description This describes the delivery channel of a scheduled appointment. Alternate names extensions, user content Definition An extension to record the delivery channel of a scheduled Appointment. Comments 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. Data type Extension(CodeableConcept) Extension URL https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-DeliveryChannel Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
modifierExtension	?! I	0..*	Extension	There are no (further) constraints on this element Element id Slot.modifierExtension Short description Extensions that cannot be ignored Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself). Requirements 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. Comments 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. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
identifier	Σ	0..*	Identifier	There are no (further) constraints on this element Element id Slot.identifier Short description External Ids for this item Definition External Ids for this item. Data type Identifier Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CX / EI (occasionally, more often EI maps to a resource id or a URL) rim: II - The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs. Also maps to Role[classCode=IDENT] servd: Identifier w5: FiveWs.identifier
serviceCategory	Σ	0..*	CodeableConcept	There are no (further) constraints on this element Element id Slot.serviceCategory Short description A broad categorization of the service that is to be performed during this appointment Definition A broad categorization of the service that is to be performed during this appointment. Comments Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. Data type CodeableConcept Binding ServiceCategory (example) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: FiveWs.class
serviceType	Σ	0..*	CodeableConcept	There are no (further) constraints on this element Element id Slot.serviceType Short description The type of appointments that can be booked into this slot (ideally this would be an identifiable service - which is at a location, rather than the location itself). If provided then this overrides the value provided on the availability resource Definition The type of appointments that can be booked into this slot (ideally this would be an identifiable service - which is at a location, rather than the location itself). If provided then this overrides the value provided on the availability resource. Comments Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. Data type CodeableConcept Binding ServiceType (example) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: FiveWs.class
specialty	S Σ	0..*	CodeableConceptBinding	Element id Slot.specialty Short description The specialty of a practitioner that would be required to perform the service requested in this appointment. Definition The specialty of a practitioner that would be required to perform the service requested in this appointment. Comments Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. Data type CodeableConcept Binding Additional details about where the content was created (e.g. clinical specialty). UKCorePracticeSettingCode (extensible) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: FiveWs.class
appointmentType	S Σ	0..1	CodeableConceptBinding	Element id Slot.appointmentType Short description The style of appointment or patient that may be booked in the slot. Definition The style of appointment or patient that may be booked in the slot (not service type). Comments Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination. Data type CodeableConcept Binding v2.0276 (preferred) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: FiveWs.class
schedule	S Σ I	1..1	Reference(Schedule)	Element id Slot.schedule Short description A reference to the Schedule that this Slot is an interval of. Definition The schedule resource that this slot defines an interval of status information. Comments References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc.). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository. Data type Reference(Schedule) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
status	S Σ	1..1	codeBinding	Element id Slot.status Short description The status of the slot, e.g free, busy, etc. Definition busy \| free \| busy-unavailable \| busy-tentative \| entered-in-error. Comments Note that FHIR strings SHALL NOT exceed 1MB in size Data type code Binding The free/busy status of the slot. SlotStatus (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a ical: FREEBUSY;FBTYPE=(freeBusyType):19980314T233000Z/19980315T003000Z If the freeBusyType is BUSY, then this value can be excluded
start	S Σ	1..1	instant	Element id Slot.start Short description Date/Time that the slot is to begin. Definition Date/Time that the slot is to begin. Comments Note: This is intended for where precisely observed times are required, typically system logs etc., and not human-reported times - for them, see date and dateTime (which can be as precise as instant, but is not required to be) below. Time zone is always required Data type instant Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a w5: FiveWs.planned ical: FREEBUSY;FBTYPE=FREE:(start)/19980315T003000Z If the freeBusyType is BUSY, then this value can be excluded
end	S Σ	1..1	instant	Element id Slot.end Short description Date/Time that the slot is to conclude. Definition Date/Time that the slot is to conclude. Comments Note: This is intended for where precisely observed times are required, typically system logs etc., and not human-reported times - for them, see date and dateTime (which can be as precise as instant, but is not required to be) below. Time zone is always required Data type instant Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a w5: FiveWs.planned ical: FREEBUSY:19980314T233000Z/(end) If the freeBusyType is BUSY, then this value can be excluded (as shown)
overbooked		0..1	boolean	There are no (further) constraints on this element Element id Slot.overbooked Short description This slot has already been overbooked, appointments are unlikely to be accepted for this time Definition This slot has already been overbooked, appointments are unlikely to be accepted for this time. Meaning when missing If overbooked is missing, systems may assume that there are still appointments available Data type boolean Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a
comment		0..1	string	There are no (further) constraints on this element Element id Slot.comment Short description Comments on the slot to describe any extended information. Such as custom constraints on the slot Definition Comments on the slot to describe any extended information. Such as custom constraints on the slot. Comments Note that FHIR strings SHALL NOT exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` Mappings rim: n/a

Detailed Descriptions

Slot
Definition	A slot of time on a schedule that may be available for booking appointments.
Cardinality	0...*
Invariants	dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources `contained.contained.empty()` dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated `contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()` dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource `contained.where((('#'+id in (%resource.descendants().reference \| %resource.descendants().as(canonical) \| %resource.descendants().as(uri) \| %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()` dom-6: A resource should have narrative for robust management text.`div`.exists() dom-5: If a resource is contained in another resource, it SHALL NOT have a security label `contained.meta.security.empty()`
Mappings	rim: Entity. Role, or Act rim: n/a ical: (refer to the Availability resource for the header mapping details)
Slot.id
Definition	The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.
Cardinality	0...1
Type	string
Summary	True
Comments	The only time that a resource does not have an id is when it is being submitted to the server using a create operation.
Slot.meta
Definition	The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.
Cardinality	0...1
Type	Meta
Summary	True
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a rim: N/A
Slot.implicitRules
Definition	A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.
Cardinality	0...1
Type	uri
Modifier	True
Summary	True
Comments	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. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc.
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a
Slot.language
Definition	The base language in which the resource is written.
Cardinality	0...1
Type	code
Binding	A human language. CommonLanguages (preferred)
Comments	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).
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a
Slot.text
Definition	A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.
Cardinality	0...1
Type	Narrative
Alias	narrative, html, xhtml, display
Comments	Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded information is added later.
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a rim: N/A rim: Act.text?
Slot.contained
Definition	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.
Cardinality	0...*
Type	Resource
Alias	inline resources, anonymous resources, contained resources
Comments	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. Contained resources may have profiles and tags In their meta elements, but SHALL NOT have security labels.
Mappings	rim: Entity. Role, or Act rim: N/A
Slot.extension
Definition	May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Cardinality	0...*
Type	Extension
Alias	extensions, user content
Comments	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.
Slicing	Unordered, Open, by url(Value)
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()`
Mappings	rim: n/a rim: N/A
Slot.extension:deliveryChannel
Definition	An extension to record the delivery channel of a scheduled Appointment.
Cardinality	0...1
Type	Extension(CodeableConcept)
Alias	extensions, user content
Comments	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.
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()`
Mappings	rim: n/a rim: N/A
Slot.modifierExtension
Definition	May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).
Cardinality	0...*
Type	Extension
Modifier	True
Alias	extensions, user content
Requirements	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.
Comments	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.
Slicing	Unordered, Open, by url(Value)
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()`
Mappings	rim: n/a rim: N/A
Slot.identifier
Definition	External Ids for this item.
Cardinality	0...*
Type	Identifier
Summary	True
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a v2: CX / EI (occasionally, more often EI maps to a resource id or a URL) rim: II - The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs. Also maps to Role[classCode=IDENT] servd: Identifier w5: FiveWs.identifier
Slot.serviceCategory
Definition	A broad categorization of the service that is to be performed during this appointment.
Cardinality	0...*
Type	CodeableConcept
Binding	ServiceCategory (example)
Summary	True
Comments	Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination.
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: FiveWs.class
Slot.serviceType
Definition	The type of appointments that can be booked into this slot (ideally this would be an identifiable service - which is at a location, rather than the location itself). If provided then this overrides the value provided on the availability resource.
Cardinality	0...*
Type	CodeableConcept
Binding	ServiceType (example)
Summary	True
Comments	Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination.
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: FiveWs.class
Slot.specialty
Definition	The specialty of a practitioner that would be required to perform the service requested in this appointment.
Cardinality	0...*
Type	CodeableConcept
Binding	Additional details about where the content was created (e.g. clinical specialty). UKCorePracticeSettingCode (extensible)
Must Support	True
Summary	True
Comments	Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination.
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: FiveWs.class
Slot.appointmentType
Definition	The style of appointment or patient that may be booked in the slot (not service type).
Cardinality	0...1
Type	CodeableConcept
Binding	v2.0276 (preferred)
Must Support	True
Summary	True
Comments	Not all terminology uses fit this general pattern. In some cases, models should not use CodeableConcept and use Coding directly and provide their own structure for managing text, codings, translations and the relationship between elements and pre- and post-coordination.
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: FiveWs.class
Slot.schedule
Definition	The schedule resource that this slot defines an interval of status information.
Cardinality	1...1
Type	Reference(Schedule)
Must Support	True
Summary	True
Comments	References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc.). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository.
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %rootResource.contained.id.trace('ids'))`
Mappings	rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
Slot.status
Definition	busy \| free \| busy-unavailable \| busy-tentative \| entered-in-error.
Cardinality	1...1
Type	code
Binding	The free/busy status of the slot. SlotStatus (required)
Must Support	True
Summary	True
Comments	Note that FHIR strings SHALL NOT exceed 1MB in size
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a ical: FREEBUSY;FBTYPE=(freeBusyType):19980314T233000Z/19980315T003000Z If the freeBusyType is BUSY, then this value can be excluded
Slot.start
Definition	Date/Time that the slot is to begin.
Cardinality	1...1
Type	instant
Must Support	True
Summary	True
Comments	Note: This is intended for where precisely observed times are required, typically system logs etc., and not human-reported times - for them, see date and dateTime (which can be as precise as instant, but is not required to be) below. Time zone is always required
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a w5: FiveWs.planned ical: FREEBUSY;FBTYPE=FREE:(start)/19980315T003000Z If the freeBusyType is BUSY, then this value can be excluded
Slot.end
Definition	Date/Time that the slot is to conclude.
Cardinality	1...1
Type	instant
Must Support	True
Summary	True
Comments	Note: This is intended for where precisely observed times are required, typically system logs etc., and not human-reported times - for them, see date and dateTime (which can be as precise as instant, but is not required to be) below. Time zone is always required
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a w5: FiveWs.planned ical: FREEBUSY:19980314T233000Z/(end) If the freeBusyType is BUSY, then this value can be excluded (as shown)
Slot.overbooked
Definition	This slot has already been overbooked, appointments are unlikely to be accepted for this time.
Cardinality	0...1
Type	boolean
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a
Slot.comment
Definition	Comments on the slot to describe any extended information. Such as custom constraints on the slot.
Cardinality	0...1
Type	string
Comments	Note that FHIR strings SHALL NOT exceed 1MB in size
Invariants	ele-1: All FHIR elements must have a @value or children `hasValue() or (children().count() > id.count())`
Mappings	rim: n/a

Table View

Slot		..
Slot.extension	Extension	..1
Slot.specialty		..
Slot.appointmentType		..
Slot.schedule		..
Slot.status		..
Slot.start		..
Slot.end		..

XML View

<StructureDefinition xmlns="http://hl7.org/fhir">
    <id value="UKCore-Slot" />
    <url value="https://fhir.hl7.org.uk/StructureDefinition/UKCore-Slot" />
    <version value="1.3.0" />
    <name value="UKCoreSlot" />
    <title value="UK Core Slot" />
    <status value="active" />
    <date value="2023-12-12" />
    <publisher value="HL7 UK" />
    <contact>
        <name value="HL7 UK" />
        <telecom>
            <system value="email" />
            <value value="ukcore@hl7.org.uk" />
            <use value="work" />
            <rank value="1" />
        </telecom>
    </contact>
    <description value="This profile defines the UK constraints and extensions on the International FHIR resource [Slot](https://hl7.org/fhir/R4/Slot.html)." />
    <purpose value="Slot resources are used to provide time-slots that can be booked using an appointment. They do not provide any information about appointments that are available, just the time, and optionally what the time can be used for. These are effectively spaces of free/busy time.\nSlots can also be marked as busy without having appointments associated." />
    <copyright value="Copyright &#169; 2021+ HL7 UK Licensed under the Apache License, Version 2.0 (the &quot;License&quot;); you may not use this file except in compliance with the License. You may obtain a copy of the License at  http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. HL7&#174; FHIR&#174; standard Copyright &#169; 2011+ HL7 The HL7&#174; FHIR&#174; standard is used under the FHIR license. You may obtain a copy of the FHIR license at  https://www.hl7.org/fhir/license.html." />
    <fhirVersion value="4.0.1" />
    <kind value="resource" />
    <abstract value="false" />
    <type value="Slot" />
    <baseDefinition value="http://hl7.org/fhir/StructureDefinition/Slot" />
    <derivation value="constraint" />
    <differential>
        <element id="Slot.extension:deliveryChannel">
            <path value="Slot.extension" />
            <sliceName value="deliveryChannel" />
            <short value="This describes the delivery channel of a scheduled appointment." />
            <max value="1" />
            <type>
                <code value="Extension" />
                <profile value="https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-DeliveryChannel" />
            </type>
            <isModifier value="false" />
        </element>
        <element id="Slot.specialty">
            <path value="Slot.specialty" />
            <short value="The specialty of a practitioner that would be required to perform the service requested in this appointment." />
            <mustSupport value="true" />
            <binding>
                <strength value="extensible" />
                <valueSet value="https://fhir.hl7.org.uk/ValueSet/UKCore-PracticeSettingCode" />
            </binding>
        </element>
        <element id="Slot.appointmentType">
            <path value="Slot.appointmentType" />
            <short value="The style of appointment or patient that may be booked in the slot." />
            <mustSupport value="true" />
        </element>
        <element id="Slot.schedule">
            <path value="Slot.schedule" />
            <short value="A reference to the Schedule that this Slot is an interval of." />
            <mustSupport value="true" />
        </element>
        <element id="Slot.status">
            <path value="Slot.status" />
            <short value="The status of the slot, e.g free, busy, etc." />
            <mustSupport value="true" />
        </element>
        <element id="Slot.start">
            <path value="Slot.start" />
            <short value="Date/Time that the slot is to begin." />
            <mustSupport value="true" />
        </element>
        <element id="Slot.end">
            <path value="Slot.end" />
            <short value="Date/Time that the slot is to conclude." />
            <mustSupport value="true" />
        </element>
    </differential>
</StructureDefinition>

JSON View

{
    "resourceType": "StructureDefinition",
    "id": "UKCore-Slot",
    "url": "https://fhir.hl7.org.uk/StructureDefinition/UKCore-Slot",
    "version": "1.3.0",
    "name": "UKCoreSlot",
    "title": "UK Core Slot",
    "status": "active",
    "date": "2023-12-12",
    "publisher": "HL7 UK",
    "contact":  [
        {
            "name": "HL7 UK",
            "telecom":  [
                {
                    "system": "email",
                    "value": "ukcore@hl7.org.uk",
                    "use": "work",
                    "rank": 1
                }
            ]
        }
    ],
    "description": "This profile defines the UK constraints and extensions on the International FHIR resource [Slot](https://hl7.org/fhir/R4/Slot.html).",
    "purpose": "Slot resources are used to provide time-slots that can be booked using an appointment. They do not provide any information about appointments that are available, just the time, and optionally what the time can be used for. These are effectively spaces of free/busy time.\nSlots can also be marked as busy without having appointments associated.",
    "copyright": "Copyright © 2021+ HL7 UK Licensed under the Apache License, Version 2.0 (the \"License\"); you may not use this file except in compliance with the License. You may obtain a copy of the License at  http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. HL7® FHIR® standard Copyright © 2011+ HL7 The HL7® FHIR® standard is used under the FHIR license. You may obtain a copy of the FHIR license at  https://www.hl7.org/fhir/license.html.",
    "fhirVersion": "4.0.1",
    "kind": "resource",
    "abstract": false,
    "type": "Slot",
    "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Slot",
    "derivation": "constraint",
    "differential": {
        "element":  [
            {
                "id": "Slot.extension:deliveryChannel",
                "path": "Slot.extension",
                "sliceName": "deliveryChannel",
                "short": "This describes the delivery channel of a scheduled appointment.",
                "max": "1",
                "type":  [
                    {
                        "code": "Extension",
                        "profile":  [
                            "https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-DeliveryChannel"
                        ]
                    }
                ],
                "isModifier": false
            },
            {
                "id": "Slot.specialty",
                "path": "Slot.specialty",
                "short": "The specialty of a practitioner that would be required to perform the service requested in this appointment.",
                "mustSupport": true,
                "binding": {
                    "strength": "extensible",
                    "valueSet": "https://fhir.hl7.org.uk/ValueSet/UKCore-PracticeSettingCode"
                }
            },
            {
                "id": "Slot.appointmentType",
                "path": "Slot.appointmentType",
                "short": "The style of appointment or patient that may be booked in the slot.",
                "mustSupport": true
            },
            {
                "id": "Slot.schedule",
                "path": "Slot.schedule",
                "short": "A reference to the Schedule that this Slot is an interval of.",
                "mustSupport": true
            },
            {
                "id": "Slot.status",
                "path": "Slot.status",
                "short": "The status of the slot, e.g free, busy, etc.",
                "mustSupport": true
            },
            {
                "id": "Slot.start",
                "path": "Slot.start",
                "short": "Date/Time that the slot is to begin.",
                "mustSupport": true
            },
            {
                "id": "Slot.end",
                "path": "Slot.end",
                "short": "Date/Time that the slot is to conclude.",
                "mustSupport": true
            }
        ]
    }
}

Feedback

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Examples

Available Walk In Visit - An example to illustrate a slot regarding a walk in visit.
Example UKCore-Slot-AvailableWalkInVisit

Example Usage Scenarios

The following are example usage scenarios for the UK Core Slot profile:

Query for slot information from a given schedule
Exchange slot information within a FHIR document or message.

Profile Specific Implementation Guidance:

Mandatory and Must Support Data Elements

The following elements are identified as MustSupport, and it is expected that consumers and suppliers SHALL support these as per the MustSupport Guidance.

Element	Reason
`Slot.specialty`	The specialty of a practitioner that would be required to perform the service requested in this appointment.
`Slot.appointmentType`	The style of appointment or patient that may be booked in the slot.
`Slot.schedule`	A reference to the Schedule that this Slot is an interval of.
`Slot.status`	The status of the slot, e.g free, busy, etc.
`Slot.start`	Date/Time that the slot is to begin.
`Slot.end`	Date/Time that the slot is to conclude.

Extensions

More information about the extensions on the UKCore-Slot profile can be found using the links below.

Extension	Context	Link	Comment
deliveryChannel	Slot.extension	https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-DeliveryChannel	This describes the delivery channel of a scheduled appointment.

Bindings (differential)

More information about the bindings to UK Core ValueSets can be found below.

Context	Strength	Link
Slot.specialty	extensible	https://fhir.hl7.org.uk/ValueSet/UKCore-PracticeSettingCode

Slot.extension:deliveryChannel

extensible

ValueSet UKCore-DeliveryChannel

`schedule`

Where possible, it is expected that the resource being referenced SHOULD conform to Profile UKCore-Schedule.