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

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

## author
**Description:** Who created

**Type:** reference

**Expression:** Basic.author

**Path:** Basic.author

**Standards Status:** normative

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


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

## code
**Description:** Kind of Resource

**Type:** token

**Expression:** Basic.code

**Path:** Basic.code

**Standards Status:** normative

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


<a id="created"></a>

## created
**Description:** When created

**Type:** date

**Expression:** Basic.created

**Path:** Basic.created

**Standards Status:** normative

**URL:** http://hl7.org/fhir/build/SearchParameter/Basic-created


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

## identifier
**Description:** Business identifier

**Type:** token

**Expression:** Basic.identifier

**Path:** Basic.identifier

**Standards Status:** normative

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


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

## patient
**Description:** Identifies the focus of this resource

**Type:** reference

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

**Path:** Basic.subject

**Standards Status:** normative

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


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

## subject
**Description:** Identifies the focus of this resource

**Type:** reference

**Expression:** Basic.subject

**Path:** Basic.subject

**Standards Status:** normative

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