### ----------------------------------------------------
### -- FHIR
### -- Licenses: Artistic-2.0
### -- Authors: Hugh Simpson
### -- File: t/resources/structureDefinition/SubstanceSpecification.json
### ----------------------------------------------------
### -- Chunk 18 of 21
        "path" : "DomainResource.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "SubstanceSpecification.modifierExtension",
      "path" : "SubstanceSpecification.modifierExtension",
      "short" : "Extensions that cannot be ignored",
      "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.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
      "comment" : "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.",
      "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](extensibility.html#modifierExtension).",
      "alias" : ["extensions",
      "user content"],
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "DomainResource.modifierExtension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "isModifier" : true,
      "isModifierReason" : "Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them",
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "SubstanceSpecification.identifier",
      "path" : "SubstanceSpecification.identifier",
      "short" : "Identifier by which this substance is known",
      "definition" : "Identifier by which this substance is known.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.identifier",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Identifier"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.type",
      "path" : "SubstanceSpecification.type",
      "short" : "High level categorization, e.g. polymer or nucleic acid",
      "definition" : "High level categorization, e.g. polymer or nucleic acid.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.type",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.status",
      "path" : "SubstanceSpecification.status",
      "short" : "Status of substance within the catalogue e.g. approved",
      "definition" : "Status of substance within the catalogue e.g. approved.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.status",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.domain",
      "path" : "SubstanceSpecification.domain",
      "short" : "If the substance applies to only human or veterinary use",
      "definition" : "If the substance applies to only human or veterinary use.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.domain",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.description",
      "path" : "SubstanceSpecification.description",
      "short" : "Textual description of the substance",
      "definition" : "Textual description of the substance.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.description",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.source",
      "path" : "SubstanceSpecification.source",
      "short" : "Supporting literature",
      "definition" : "Supporting literature.",
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "SubstanceSpecification.source",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Reference",
        "targetProfile" : ["http://hl7.org/fhir/StructureDefinition/DocumentReference"]
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.comment",
      "path" : "SubstanceSpecification.comment",
      "short" : "Textual comment about this record of a substance",
      "definition" : "Textual comment about this record of a substance.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.comment",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.moiety",
      "path" : "SubstanceSpecification.moiety",
      "short" : "Moiety, for structural modifications",
      "definition" : "Moiety, for structural modifications.",
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "SubstanceSpecification.moiety",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "BackboneElement"
      }],
      "constraint" : [{
        "key" : "ele-1",
        "severity" : "error",
        "human" : "All FHIR elements must have a @value or children",
        "expression" : "hasValue() or (children().count() > id.count())",
        "xpath" : "@value|f:*|h:div",
        "source" : "Element"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.moiety.id",
      "path" : "SubstanceSpecification.moiety.id",
      "representation" : ["xmlAttr"],
      "short" : "Unique id for inter-element referencing",
      "definition" : "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Element.id",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "SubstanceSpecification.moiety.extension",
      "path" : "SubstanceSpecification.moiety.extension",
      "short" : "Additional content defined by implementations",
      "definition" : "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.",
      "comment" : "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.",
      "alias" : ["extensions",
      "user content"],
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "SubstanceSpecification.moiety.modifierExtension",
      "path" : "SubstanceSpecification.moiety.modifierExtension",
      "short" : "Extensions that cannot be ignored even if unrecognized",
      "definition" : "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.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
      "comment" : "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.",
      "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](extensibility.html#modifierExtension).",
      "alias" : ["extensions",
      "user content",
      "modifiers"],
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "BackboneElement.modifierExtension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "isModifier" : true,
      "isModifierReason" : "Modifier extensions are expected to modify the meaning or interpretation of the element that contains them",
      "isSummary" : true,
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "SubstanceSpecification.moiety.role",
      "path" : "SubstanceSpecification.moiety.role",
      "short" : "Role that the moiety is playing",
      "definition" : "Role that the moiety is playing.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.moiety.role",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.moiety.identifier",
      "path" : "SubstanceSpecification.moiety.identifier",
      "short" : "Identifier by which this moiety substance is known",
      "definition" : "Identifier by which this moiety substance is known.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.moiety.identifier",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Identifier"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.moiety.name",
      "path" : "SubstanceSpecification.moiety.name",
      "short" : "Textual name for this moiety substance",
      "definition" : "Textual name for this moiety substance.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.moiety.name",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.moiety.stereochemistry",
      "path" : "SubstanceSpecification.moiety.stereochemistry",
      "short" : "Stereochemistry type",
      "definition" : "Stereochemistry type.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.moiety.stereochemistry",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.moiety.opticalActivity",
      "path" : "SubstanceSpecification.moiety.opticalActivity",
      "short" : "Optical activity type",
      "definition" : "Optical activity type.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.moiety.opticalActivity",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.moiety.molecularFormula",
      "path" : "SubstanceSpecification.moiety.molecularFormula",
      "short" : "Molecular formula",
      "definition" : "Molecular formula.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.moiety.molecularFormula",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.moiety.amount[x]",
      "path" : "SubstanceSpecification.moiety.amount[x]",
      "short" : "Quantitative value for this moiety",
      "definition" : "Quantitative value for this moiety.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.moiety.amount[x]",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Quantity"
      },
      {
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.property",
      "path" : "SubstanceSpecification.property",
      "short" : "General specifications for this substance, including how it is related to other substances",
      "definition" : "General specifications for this substance, including how it is related to other substances.",
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "SubstanceSpecification.property",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "BackboneElement"
      }],
      "constraint" : [{
        "key" : "ele-1",
        "severity" : "error",
        "human" : "All FHIR elements must have a @value or children",
        "expression" : "hasValue() or (children().count() > id.count())",
        "xpath" : "@value|f:*|h:div",
        "source" : "Element"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.property.id",
      "path" : "SubstanceSpecification.property.id",
      "representation" : ["xmlAttr"],
      "short" : "Unique id for inter-element referencing",
      "definition" : "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Element.id",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "SubstanceSpecification.property.extension",
      "path" : "SubstanceSpecification.property.extension",
      "short" : "Additional content defined by implementations",
      "definition" : "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.",
      "comment" : "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.",
      "alias" : ["extensions",
      "user content"],
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "SubstanceSpecification.property.modifierExtension",
      "path" : "SubstanceSpecification.property.modifierExtension",
      "short" : "Extensions that cannot be ignored even if unrecognized",
      "definition" : "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.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
      "comment" : "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.",
      "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](extensibility.html#modifierExtension).",
      "alias" : ["extensions",
      "user content",
      "modifiers"],
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "BackboneElement.modifierExtension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "isModifier" : true,
      "isModifierReason" : "Modifier extensions are expected to modify the meaning or interpretation of the element that contains them",
      "isSummary" : true,
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "SubstanceSpecification.property.category",
      "path" : "SubstanceSpecification.property.category",
      "short" : "A category for this property, e.g. Physical, Chemical, Enzymatic",
      "definition" : "A category for this property, e.g. Physical, Chemical, Enzymatic.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.property.category",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.property.code",
      "path" : "SubstanceSpecification.property.code",
      "short" : "Property type e.g. viscosity, pH, isoelectric point",
      "definition" : "Property type e.g. viscosity, pH, isoelectric point.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.property.code",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.property.parameters",
      "path" : "SubstanceSpecification.property.parameters",
      "short" : "Parameters that were used in the measurement of a property (e.g. for viscosity: measured at 20C with a pH of 7.1)",
      "definition" : "Parameters that were used in the measurement of a property (e.g. for viscosity: measured at 20C with a pH of 7.1).",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.property.parameters",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.property.definingSubstance[x]",
      "path" : "SubstanceSpecification.property.definingSubstance[x]",
      "short" : "A substance upon which a defining property depends (e.g. for solubility: in water, in alcohol)",
      "definition" : "A substance upon which a defining property depends (e.g. for solubility: in water, in alcohol).",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.property.definingSubstance[x]",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Reference",
        "targetProfile" : ["http://hl7.org/fhir/StructureDefinition/SubstanceSpecification",
        "http://hl7.org/fhir/StructureDefinition/Substance"]
      },
      {
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.property.amount[x]",
      "path" : "SubstanceSpecification.property.amount[x]",
      "short" : "Quantitative value for this property",
      "definition" : "Quantitative value for this property.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.property.amount[x]",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Quantity"
      },
      {
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.referenceInformation",
      "path" : "SubstanceSpecification.referenceInformation",
      "short" : "General information detailing this substance",
      "definition" : "General information detailing this substance.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.referenceInformation",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Reference",
        "targetProfile" : ["http://hl7.org/fhir/StructureDefinition/SubstanceReferenceInformation"]
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.structure",
      "path" : "SubstanceSpecification.structure",
      "short" : "Structural information",
      "definition" : "Structural information.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.structure",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "BackboneElement"
      }],
      "constraint" : [{
        "key" : "ele-1",
        "severity" : "error",
        "human" : "All FHIR elements must have a @value or children",
        "expression" : "hasValue() or (children().count() > id.count())",
        "xpath" : "@value|f:*|h:div",
        "source" : "Element"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.structure.id",
      "path" : "SubstanceSpecification.structure.id",
      "representation" : ["xmlAttr"],
      "short" : "Unique id for inter-element referencing",
      "definition" : "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Element.id",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "SubstanceSpecification.structure.extension",
      "path" : "SubstanceSpecification.structure.extension",
      "short" : "Additional content defined by implementations",
      "definition" : "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.",
      "comment" : "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.",
      "alias" : ["extensions",
      "user content"],
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "SubstanceSpecification.structure.modifierExtension",
      "path" : "SubstanceSpecification.structure.modifierExtension",
      "short" : "Extensions that cannot be ignored even if unrecognized",
      "definition" : "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.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
      "comment" : "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.",
      "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](extensibility.html#modifierExtension).",
      "alias" : ["extensions",
      "user content",
      "modifiers"],
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "BackboneElement.modifierExtension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "isModifier" : true,
      "isModifierReason" : "Modifier extensions are expected to modify the meaning or interpretation of the element that contains them",
      "isSummary" : true,
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "SubstanceSpecification.structure.stereochemistry",
      "path" : "SubstanceSpecification.structure.stereochemistry",
      "short" : "Stereochemistry type",
      "definition" : "Stereochemistry type.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.structure.stereochemistry",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.structure.opticalActivity",
      "path" : "SubstanceSpecification.structure.opticalActivity",
      "short" : "Optical activity type",
      "definition" : "Optical activity type.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.structure.opticalActivity",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.structure.molecularFormula",
      "path" : "SubstanceSpecification.structure.molecularFormula",
      "short" : "Molecular formula",
      "definition" : "Molecular formula.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.structure.molecularFormula",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.structure.molecularFormulaByMoiety",
      "path" : "SubstanceSpecification.structure.molecularFormulaByMoiety",
      "short" : "Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot",
      "definition" : "Specified per moiety according to the Hill system, i.e. first C, then H, then alphabetical, each moiety separated by a dot.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "SubstanceSpecification.structure.molecularFormulaByMoiety",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "isModifier" : false,
      "isSummary" : true
    },
    {
      "id" : "SubstanceSpecification.structure.isotope",
      "path" : "SubstanceSpecification.structure.isotope",
      "short" : "Applicable for single substances that contain a radionuclide or a non-natural isotopic ratio",
      "definition" : "Applicable for single substances that contain a radionuclide or a non-natural isotopic ratio.",
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "SubstanceSpecification.structure.isotope",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "BackboneElement"
      }],
      "constraint" : [{
        "key" : "ele-1",
        "severity" : "error",
        "human" : "All FHIR elements must have a @value or children",
        "expression" : "hasValue() or (children().count() > id.count())",
        "xpath" : "@value|f:*|h:div",
        "source" : "Element"
      }],
      "isModifier" : false,
      "isSummary