---
type: "search-params"
title: "Composition Search Parameters"
resource: "Composition"
---
# Composition Search Parameters

<a id="attester"></a>

## attester
**Description:** Who attested the composition

**Type:** reference

**Expression:** Composition.attester.party

**Path:** Composition.attester.party

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-attester


<a id="author"></a>

## author
**Description:** Who and/or what authored the composition

**Type:** reference

**Expression:** Composition.author

**Path:** Composition.author

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-author


<a id="category"></a>

## category
**Description:** Categorization of Composition

**Type:** token

**Expression:** Composition.category

**Path:** Composition.category

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-category


<a id="event-code"></a>

## event-code
**Description:** Main clinical acts documented as codes

**Type:** token

**Expression:** Composition.event.detail.concept

**Path:** Composition.event.detail.concept

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-event-code


<a id="event-reference"></a>

## event-reference
**Description:** Main clinical acts documented as references

**Type:** reference

**Expression:** Composition.event.detail.reference

**Path:** Composition.event.detail.reference

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-event-reference


<a id="date"></a>

## date
**Description:** Composition editing time

**Type:** date

**Expression:** Composition.date

**Path:** Composition.date

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-date


<a id="encounter"></a>

## encounter
**Description:** Context of the Composition

**Type:** reference

**Expression:** Composition.encounter

**Path:** Composition.encounter

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-encounter


<a id="entry"></a>

## entry
**Description:** A reference to data that supports this section

**Type:** reference

**Expression:** Composition.repeat(section).entry

**Path:** Composition.section.entry

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-entry


<a id="identifier"></a>

## identifier
**Description:** Version-independent identifier for the Composition

**Type:** token

**Expression:** Composition.identifier

**Path:** Composition.identifier

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-identifier


<a id="patient"></a>

## patient
**Description:** Who and/or what the composition is about

**Type:** reference

**Expression:** Composition.subject.where(resolve() is Patient)

**Path:** Composition.subject

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-patient


<a id="period"></a>

## period
**Description:** The period covered by the documentation

**Type:** date

**Expression:** Composition.event.period

**Path:** Composition.event.period

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-period


<a id="section"></a>

## section
**Description:** Classification of section (recommended)

**Type:** token

**Expression:** Composition.repeat(section).code

**Path:** Composition.section.code

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-section


<a id="status"></a>

## status
**Description:** preliminary | final | amended | entered-in-error

**Type:** token

**Expression:** Composition.status

**Path:** Composition.status

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-status


<a id="subject"></a>

## subject
**Description:** Who and/or what the composition is about

**Type:** reference

**Expression:** Composition.subject

**Path:** Composition.subject

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-subject


<a id="title"></a>

## title
**Description:** Human Readable name/title

**Type:** string

**Expression:** Composition.title

**Path:** Composition.title

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-title


<a id="type"></a>

## type
**Description:** Kind of composition (LOINC if possible)

**Type:** token

**Expression:** Composition.type

**Path:** Composition.type

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-type


<a id="url"></a>

## url
**Description:** The uri that identifies the activity definition

**Type:** uri

**Expression:** Composition.url

**Path:** {{name}}.url

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-url


<a id="version"></a>

## version
**Description:** The business version of the activity definition

**Type:** token

**Expression:** Composition.version

**Path:** {{name}}.version

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-version


<a id="section-text"></a>

## section-text
**Description:** Search on the section narrative of the resource

**Type:** special

**Expression:** Composition.repeat(section).text

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-section-text


<a id="section-code-text"></a>

## section-code-text
**Description:** Search on the section narrative of the resource

**Type:** composite

**Expression:** Composition.repeat(section)

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Composition-section-code-text