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_Optional
_Textual description of the substance
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_A set of rules under which this content was created
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_Language of the resource content
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codeCodes associated with the substance
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commentTextual comment about this record of a substance
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containedContained, inline Resources
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descriptionTextual description of the substance
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domainIf the substance applies to only human or veterinary use
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extensionAdditional content defined by implementations
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idLogical id of this artifact
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identifierIdentifier by which this substance is known
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implicitA set of rules under which this content was created
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languageLanguage of the resource content
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metaMetadata about the resource
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modifierExtensions that cannot be ignored
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moietyMoiety, for structural modifications
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molecularThe molecular weight or weight range (for proteins, polymers or nucleic acids)
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nameNames applicable to this substance
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nucleicData items specific to nucleic acids
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polymerData items specific to polymers
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propertyGeneral specifications for this substance, including how it is related to other substances
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proteinData items specific to proteins
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referenceGeneral information detailing this substance
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relationshipA link between this substance and another, with details of the relationship
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sourceSupporting literature
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sourceMaterial or taxonomic/anatomical source for the substance
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statusStatus of substance within the catalogue e.g. approved
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structureStructural information
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textText summary of the resource, for human interpretation
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typeHigh level categorization, e.g. polymer or nucleic acid
Textual comment about this record of a substance