SubstanceSpecification

The detailed description of a substance, typically at a level beyond what is used for prescribing.

Properties

Name	Required	Type	Description
identifier		Identifier	Identifier by which this substance is known Details Identifier by which this substance is known.
type		CodeableConcept	High level categorization, e.g. polymer or nucleic acid Details High level categorization, e.g. polymer or nucleic acid.
status		CodeableConcept	Status of substance within the catalogue e.g. approved Details Status of substance within the catalogue e.g. approved.
domain		CodeableConcept	If the substance applies to only human or veterinary use Details If the substance applies to only human or veterinary use.
description		string	Textual description of the substance Details Textual description of the substance.
source		Reference<DocumentReference>[]	Supporting literature Details Supporting literature.
comment		string	Textual comment about this record of a substance Details Textual comment about this record of a substance.
moiety		SubstanceSpecificationMoiety[]	Moiety, for structural modifications Details Moiety, for structural modifications.
id		string	Unique id for inter-element referencing Details Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored even if unrecognized Details 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). 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.
role		CodeableConcept	Role that the moiety is playing Details Role that the moiety is playing.
identifier		Identifier	Identifier by which this moiety substance is known Details Identifier by which this moiety substance is known.
name		string	Textual name for this moiety substance Details Textual name for this moiety substance.
stereochemistry		CodeableConcept	Stereochemistry type Details Stereochemistry type.
opticalActivity		CodeableConcept	Optical activity type Details Optical activity type.
molecularFormula		string	Molecular formula Details Molecular formula.
amount[x]		Quantity, string	Quantitative value for this moiety Details Quantitative value for this moiety.
property		SubstanceSpecificationProperty[]	General specifications for this substance, including how it is related to other substances Details General specifications for this substance, including how it is related to other substances.
id		string	Unique id for inter-element referencing Details Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored even if unrecognized Details 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). 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.
category		CodeableConcept	A category for this property, e.g. Physical, Chemical, Enzymatic Details A category for this property, e.g. Physical, Chemical, Enzymatic.
code		CodeableConcept	Property type e.g. viscosity, pH, isoelectric point Details Property type e.g. viscosity, pH, isoelectric point.
parameters		string	Parameters that were used in the measurement of a property (e.g. for viscosity: measured at 20C with a pH of 7.1) Details Parameters that were used in the measurement of a property (e.g. for viscosity: measured at 20C with a pH of 7.1).
definingSubstance[x]		Reference<SubstanceSpecification | Substance>, CodeableConcept	A substance upon which a defining property depends (e.g. for solubility: in water, in alcohol) Details A substance upon which a defining property depends (e.g. for solubility: in water, in alcohol).
amount[x]		Quantity, string	Quantitative value for this property Details Quantitative value for this property.
referenceInformation		Reference<SubstanceReferenceInformation>	General information detailing this substance Details General information detailing this substance.
structure		SubstanceSpecificationStructure	Structural information Details Structural information.
id		string	Unique id for inter-element referencing Details Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored even if unrecognized Details 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). 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.
stereochemistry		CodeableConcept	Stereochemistry type Details Stereochemistry type.
opticalActivity		CodeableConcept	Optical activity type Details Optical activity type.
molecularFormula		string	Molecular formula Details Molecular formula.
molecularFormulaByMoiety		string	Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot Details Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot.
isotope		SubstanceSpecificationStructureIsotope[]	Applicable for single substances that contain a radionuclide or a non-natural isotopic ratio Details Applicable for single substances that contain a radionuclide or a non-natural isotopic ratio.
id		string	Unique id for inter-element referencing Details Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored even if unrecognized Details 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). 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.
identifier		Identifier	Substance identifier for each non-natural or radioisotope Details Substance identifier for each non-natural or radioisotope.
name		CodeableConcept	Substance name for each non-natural or radioisotope Details Substance name for each non-natural or radioisotope.
substitution		CodeableConcept	The type of isotopic substitution present in a single substance Details The type of isotopic substitution present in a single substance.
halfLife		Quantity	Half life - for a non-natural nuclide Details Half life - for a non-natural nuclide.
molecularWeight		SubstanceSpecificationStructureIsotopeMolecularWeight	The molecular weight or weight range (for proteins, polymers or nucleic acids) Details The molecular weight or weight range (for proteins, polymers or nucleic acids).
id		string	Unique id for inter-element referencing Details Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored even if unrecognized Details 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). 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.
method		CodeableConcept	The method by which the molecular weight was determined Details The method by which the molecular weight was determined.
type		CodeableConcept	Type of molecular weight such as exact, average (also known as. number average), weight average Details Type of molecular weight such as exact, average (also known as. number average), weight average.
amount		Quantity	Used to capture quantitative values for a variety of elements. If only limits are given, the arithmetic mean would be the average. If only a single definite value for a given element is given, it would be captured in this field Details Used to capture quantitative values for a variety of elements. If only limits are given, the arithmetic mean would be the average. If only a single definite value for a given element is given, it would be captured in this field.
molecularWeight			The molecular weight or weight range (for proteins, polymers or nucleic acids) Details The molecular weight or weight range (for proteins, polymers or nucleic acids).
source		Reference<DocumentReference>[]	Supporting literature Details Supporting literature.
representation		SubstanceSpecificationStructureRepresentation[]	Molecular structural representation Details Molecular structural representation.
id		string	Unique id for inter-element referencing Details Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored even if unrecognized Details 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). 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.
type		CodeableConcept	The type of structure (e.g. Full, Partial, Representative) Details The type of structure (e.g. Full, Partial, Representative).
representation		string	The structural representation as text string in a format e.g. InChI, SMILES, MOLFILE, CDX Details The structural representation as text string in a format e.g. InChI, SMILES, MOLFILE, CDX.
attachment		Attachment	An attached file with the structural representation Details An attached file with the structural representation.
code		SubstanceSpecificationCode[]	Codes associated with the substance Details Codes associated with the substance.
id		string	Unique id for inter-element referencing Details Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored even if unrecognized Details 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). 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.
code		CodeableConcept	The specific code Details The specific code.
status		CodeableConcept	Status of the code assignment Details Status of the code assignment.
statusDate		dateTime	The date at which the code status is changed as part of the terminology maintenance Details The date at which the code status is changed as part of the terminology maintenance.
comment		string	Any comment can be provided in this field, if necessary Details Any comment can be provided in this field, if necessary.
source		Reference<DocumentReference>[]	Supporting literature Details Supporting literature.
name		SubstanceSpecificationName[]	Names applicable to this substance Details Names applicable to this substance.
id		string	Unique id for inter-element referencing Details Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored even if unrecognized Details 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). 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.
name	✓	string	The actual name Details The actual name.
type		CodeableConcept	Name type Details Name type.
status		CodeableConcept	The status of the name Details The status of the name.
preferred		boolean	If this is the preferred name for this substance Details If this is the preferred name for this substance.
language		CodeableConcept[]	Language of the name Details Language of the name.
domain		CodeableConcept[]	The use context of this name for example if there is a different name a drug active ingredient as opposed to a food colour additive Details The use context of this name for example if there is a different name a drug active ingredient as opposed to a food colour additive.
jurisdiction		CodeableConcept[]	The jurisdiction where this name applies Details The jurisdiction where this name applies.
synonym		[]	A synonym of this name Details A synonym of this name.
translation		[]	A translation for this name Details A translation for this name.
official		SubstanceSpecificationNameOfficial[]	Details of the official nature of this name Details Details of the official nature of this name.
id		string	Unique id for inter-element referencing Details Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored even if unrecognized Details 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). 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.
authority		CodeableConcept	Which authority uses this official name Details Which authority uses this official name.
status		CodeableConcept	The status of the official name Details The status of the official name.
date		dateTime	Date of official name change Details Date of official name change.
source		Reference<DocumentReference>[]	Supporting literature Details Supporting literature.
molecularWeight		[]	The molecular weight or weight range (for proteins, polymers or nucleic acids) Details The molecular weight or weight range (for proteins, polymers or nucleic acids).
relationship		SubstanceSpecificationRelationship[]	A link between this substance and another, with details of the relationship Details A link between this substance and another, with details of the relationship.
id		string	Unique id for inter-element referencing Details Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored even if unrecognized Details 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). 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.
substance[x]		Reference<SubstanceSpecification>, CodeableConcept	A pointer to another substance, as a resource or just a representational code Details A pointer to another substance, as a resource or just a representational code.
relationship		CodeableConcept	For example "salt to parent", "active moiety", "starting material" Details For example "salt to parent", "active moiety", "starting material".
isDefining		boolean	For example where an enzyme strongly bonds with a particular substance, this is a defining relationship for that enzyme, out of several possible substance relationships Details For example where an enzyme strongly bonds with a particular substance, this is a defining relationship for that enzyme, out of several possible substance relationships.
amount[x]		Quantity, Range, Ratio, string	A numeric factor for the relationship, for instance to express that the salt of a substance has some percentage of the active substance in relation to some other Details A numeric factor for the relationship, for instance to express that the salt of a substance has some percentage of the active substance in relation to some other.
amountRatioLowLimit		Ratio	For use when the numeric Details For use when the numeric.
amountType		CodeableConcept	An operator for the amount, for example "average", "approximately", "less than" Details An operator for the amount, for example "average", "approximately", "less than".
source		Reference<DocumentReference>[]	Supporting literature Details Supporting literature.
nucleicAcid		Reference<SubstanceNucleicAcid>	Data items specific to nucleic acids Details Data items specific to nucleic acids.
polymer		Reference<SubstancePolymer>	Data items specific to polymers Details Data items specific to polymers.
protein		Reference<SubstanceProtein>	Data items specific to proteins Details Data items specific to proteins.
sourceMaterial		Reference<SubstanceSourceMaterial>	Material or taxonomic/anatomical source for the substance Details Material or taxonomic/anatomical source for the substance.

Search Parameters

Name	Type	Description	Expression
code	token	The specific code	SubstanceSpecification.code.code

Inherited Properties

Name	Required	Type	Description
id		string	Logical id of this artifact Details The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes. The only time that a resource does not have an id is when it is being submitted to the server using a create operation.
meta		Meta	Metadata about the resource Details 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.
implicitRules		uri	A set of rules under which this content was created Details 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. 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.
language		code	Language of the resource content Details The base language in which the resource is written. 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).
text		Narrative	Text summary of the resource, for human interpretation Details 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. 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.
contained		Resource[]	Contained, inline Resources Details 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. 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.
extension		Extension[]	Additional content defined by implementations Details 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. 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.
modifierExtension		Extension[]	Extensions that cannot be ignored Details 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). 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.