Implementation Guide
ePA MHD Service
Version 1.1.0 - release

## Extension: EPAMatchSnippetExtension - Detailed Descriptions

Active as of 2025-12-15

Definitions for the epa-match-snippet extension.

- Key Elements Table
- Differential Elements Table
- Snapshot Elements Table

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition | Diese Erweiterung enthält einen Textausschnitt, der den Kontext eines Suchtreffers beschreibt. Sie hebt relevante Inhalte hervor, die den eingegebenen Suchbegriffen entsprechen und bietet so eine präzise Vorschau auf das Suchergebnis. Optional Extension Element - found in all resources.
Short | EPA Match Snippet ExtensionOptional Extensions Element
Control | 0..* This element is affected by the following invariants: ele-1
Is Modifier | false
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())
2. Extension.extension
Definition | An Extension 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.
Short | ExtensionAdditional content defined by implementations
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.
Control | 0..* This element is affected by the following invariants: ele-1
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
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()`) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing | This element introduces a set of slices on `Extension.extension`. The slices areUnordered and ClosedOpen, and can be differentiated using the following discriminators: value @ url
4. Extension.extension:snippet
Slice Name | snippet
Definition | An Extension
Short | ExtensionAdditional content defined by implementations
Control | 0..1* This element is affected by the following invariants: ele-1
Type | Extension
Is Modifier | false
Summary | false
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()`) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
6. Extension.extension:snippet.extension
Definition | An Extension 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.
Short | ExtensionAdditional content defined by implementations
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.
Control | 0..0* This element is affected by the following invariants: ele-1
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
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()`) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing | This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
8. Extension.extension:snippet.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
XML Format | In the XML format, this property is represented as an attribute.
Fixed Value | `snippet`
10. Extension.extension:snippet.value[x]
Definition | Dieser Wert enthält einen kurzen, menschenlesbaren Textausschnitt, der den Kontext des Suchtreffers beschreibt. Er ermöglicht eine schnelle Orientierung indem relevante Inhalte aus dem gefundenen Dokument oder der Ressource dargestellt werden. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Menschenlesbarer Textausschnitt, der den Kontext des Suchtreffers beschreibtValue of extension
Control | 10..1 This element is affected by the following invariants: ele-1
Type | string, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
12. Extension.extension:pageNumber
Slice Name | pageNumber
Definition | An Extension
Short | ExtensionAdditional content defined by implementations
Control | 0..1* This element is affected by the following invariants: ele-1
Type | Extension
Is Modifier | false
Summary | false
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()`) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
14. Extension.extension:pageNumber.extension
Definition | An Extension 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.
Short | ExtensionAdditional content defined by implementations
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.
Control | 0..0* This element is affected by the following invariants: ele-1
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
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()`) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing | This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
16. Extension.extension:pageNumber.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
XML Format | In the XML format, this property is represented as an attribute.
Fixed Value | `pageNumber`
18. Extension.extension:pageNumber.value[x]
Definition | Bei Dokumenten mit Seitennummerierung, wie etwa PDF-Dateien, kann hier die konkrete Seite angegeben werden, auf der die Volltextsuche einen Treffer gefunden hat. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Bei Dokumenten mit Seitennummerierung (z.B. PDF) lässt sich hier die genaue Trefferseite der Volltextsuche angeben.Value of extension
Control | 10..1 This element is affected by the following invariants: ele-1
Type | string, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
20. Extension.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
XML Format | In the XML format, this property is represented as an attribute.
Fixed Value | `https://gematik.de/fhir/epa-mhd/StructureDefinition/epa-match-snippet`
22. Extension.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Value of extension
Control | 0..01 This element is affected by the following invariants: ele-1
Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition | Diese Erweiterung enthält einen Textausschnitt, der den Kontext eines Suchtreffers beschreibt. Sie hebt relevante Inhalte hervor, die den eingegebenen Suchbegriffen entsprechen und bietet so eine präzise Vorschau auf das Suchergebnis.
Short | EPA Match Snippet Extension
2. Extension.extension
Slicing | This element introduces a set of slices on `Extension.extension`. The slices areUnordered and Closed, and can be differentiated using the following discriminators: value @ url
4. Extension.extension:snippet
Slice Name | snippet
Control | 0..1
6. Extension.extension:snippet.extension
Control | 0..0
8. Extension.extension:snippet.url
Fixed Value | `snippet`
10. Extension.extension:snippet.value[x]
Definition | Dieser Wert enthält einen kurzen, menschenlesbaren Textausschnitt, der den Kontext des Suchtreffers beschreibt. Er ermöglicht eine schnelle Orientierung indem relevante Inhalte aus dem gefundenen Dokument oder der Ressource dargestellt werden.
Short | Menschenlesbarer Textausschnitt, der den Kontext des Suchtreffers beschreibt
Control | 1..?
Type | string
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
12. Extension.extension:pageNumber
Slice Name | pageNumber
Control | 0..1
14. Extension.extension:pageNumber.extension
Control | 0..0
16. Extension.extension:pageNumber.url
Fixed Value | `pageNumber`
18. Extension.extension:pageNumber.value[x]
Definition | Bei Dokumenten mit Seitennummerierung, wie etwa PDF-Dateien, kann hier die konkrete Seite angegeben werden, auf der die Volltextsuche einen Treffer gefunden hat.
Short | Bei Dokumenten mit Seitennummerierung (z.B. PDF) lässt sich hier die genaue Trefferseite der Volltextsuche angeben.
Control | 1..?
Type | string
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
20. Extension.url
Fixed Value | `https://gematik.de/fhir/epa-mhd/StructureDefinition/epa-match-snippet`
22. Extension.value[x]
Control | 0..0

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition | Diese Erweiterung enthält einen Textausschnitt, der den Kontext eines Suchtreffers beschreibt. Sie hebt relevante Inhalte hervor, die den eingegebenen Suchbegriffen entsprechen und bietet so eine präzise Vorschau auf das Suchergebnis.
Short | EPA Match Snippet Extension
Control | 0..* This element is affected by the following invariants: ele-1
Is Modifier | false
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()`)
2. Extension.id
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
4. Extension.extension
Definition | An Extension
Short | Extension
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
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()`)
Slicing | This element introduces a set of slices on `Extension.extension`. The slices areUnordered and Closed, and can be differentiated using the following discriminators: value @ url
6. Extension.extension:snippet
Slice Name | snippet
Definition | An Extension
Short | Extension
Control | 0..1
Type | Extension
Is Modifier | false
Summary | false
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()`)
8. Extension.extension:snippet.id
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
10. Extension.extension:snippet.extension
Definition | An Extension
Short | Extension
Control | 0..0
Type | Extension
Is Modifier | false
Summary | false
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()`)
Slicing | This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
12. Extension.extension:snippet.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
XML Format | In the XML format, this property is represented as an attribute.
Fixed Value | `snippet`
14. Extension.extension:snippet.value[x]
Definition | Dieser Wert enthält einen kurzen, menschenlesbaren Textausschnitt, der den Kontext des Suchtreffers beschreibt. Er ermöglicht eine schnelle Orientierung indem relevante Inhalte aus dem gefundenen Dokument oder der Ressource dargestellt werden.
Short | Menschenlesbarer Textausschnitt, der den Kontext des Suchtreffers beschreibt
Control | 1..1 This element is affected by the following invariants: ele-1
Type | string
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
16. Extension.extension:pageNumber
Slice Name | pageNumber
Definition | An Extension
Short | Extension
Control | 0..1
Type | Extension
Is Modifier | false
Summary | false
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()`)
18. Extension.extension:pageNumber.id
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
20. Extension.extension:pageNumber.extension
Definition | An Extension
Short | Extension
Control | 0..0
Type | Extension
Is Modifier | false
Summary | false
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()`)
Slicing | This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
22. Extension.extension:pageNumber.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
XML Format | In the XML format, this property is represented as an attribute.
Fixed Value | `pageNumber`
24. Extension.extension:pageNumber.value[x]
Definition | Bei Dokumenten mit Seitennummerierung, wie etwa PDF-Dateien, kann hier die konkrete Seite angegeben werden, auf der die Volltextsuche einen Treffer gefunden hat.
Short | Bei Dokumenten mit Seitennummerierung (z.B. PDF) lässt sich hier die genaue Trefferseite der Volltextsuche angeben.
Control | 1..1 This element is affected by the following invariants: ele-1
Type | string
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
26. Extension.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
XML Format | In the XML format, this property is represented as an attribute.
Fixed Value | `https://gematik.de/fhir/epa-mhd/StructureDefinition/epa-match-snippet`
28. Extension.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Value of extension
Control | 0..0 This element is affected by the following invariants: ele-1
Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)