Metabolomics Hub Common Data Model Nodes

MHD Domain Objects

Assay

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	Its value MUST be assay
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
repository_identifier	required	str	An assay identifier that uniquely identifies the assay in repository Minimum length: 2 Validation Rule: Min Length: 2, Required
name	required	str	Name of the assay. It SHOULD be unique in a study Minimum length: 2 Validation Rule: Min Length: 2, Required
metadata_file_ref	required	MhdObjectId	Target node type: metadata-file Validation Rule: Target node type: metadata-file
technology_type_ref	required	CvTermObjectId	Target CV term type: descriptor Validation Rules: Target node type: descriptor Allowed CV Terms: * [OBI, OBI:0000470, mass spectrometry assay], * [OBI, OBI:0000623, NMR spectroscopy assay]
analysis_type_ref	required	CvTermObjectId	Target CV term type: descriptor Validation Rules: Target node type: descriptor Allowed CV Terms: * [OBI, OBI:0003097, liquid chromatography mass spectrometry assay], * [OBI, OBI:0003110, gas chromatography mass spectrometry assay], * [OBI, OBI:0000470, mass spectrometry assay], * [OBI, OBI:0000623, NMR spectroscopy assay]
measurement_methodology_ref	required	CvTermObjectId	Target CV term type: descriptor Validation Rules: Target node type: descriptor Allowed CV Terms: * [MSIO, MSIO:0000100, targeted metabolite profiling], * [MSIO, MSIO:0000101, untargeted metabolite profiling], * [OBI, OBI:0000366, metabolite profiling assay]
protocol_refs	optional	list[MhdObjectId]	The id properties of protocols used in assay. A protocol is a defined and standardized procedure followed to collect, prepare, or analyze biological samples Target node type: protocol Validation Rule: Target node type: protocol
sample_run_refs	optional	list[MhdObjectId]	Target node type: sample-run Validation Rule: Target node type: sample-run

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
assay	described-as	describes	descriptor	0	N	A link to a descriptor that describes the assay.
assay	follows	used-in	protocol	0	N	A link to a protocol conducted in assay.
assay	has-derived-data-file	created-in	derived-data-file	0	N	A link to a descriptor that describes the assay.
assay	part-of	has-assay	study	1	1	A link to a study that the assay was conducted as part of it to generate data addressing study objectives Required min count in the dataset: 1.

Embedded Relationships: descriptor, metadata-file, protocol, sample-run

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
derived-data-file	created-in	has-derived-data-file	assay	0	N
descriptor	describes	described-as	assay	0	N
protocol	used-in	follows	assay	0	N
study	has-assay	part-of	assay	1	N	Required min count in the dataset: 1.

Characteristic Definition

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be characteristic-definition
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
name	required	str	Minimum length: 2 Validation Rule: Min Length: 2, Required
characteristic_type_ref	required	CvTermObjectId	Target CV term type: characteristic-type Validation Rules: Target node type: characteristic-type Allowed CV Terms: * [NCIT, NCIT:C14250, organism], * [NCIT, NCIT:C103199, organism part], * [EFO, EFO:0000408, disease], * [EFO, EFO:0000324, cell type]

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
characteristic-definition	has-instance	instance-of	characteristic-value	0	N	Required min count in the dataset: 2. Target Validation Rules: ----- Conditional - (Organism) [Source characteristic_type_ref.accession = NCIT:C14250] Ontology Sources:ENVO, NCBITAXON Exceptions: Allowed Other Sources: wikidata ----- Conditional - (Organism part) [Source characteristic_type_ref.accession = NCIT:C103199] Ontology Sources:UBERON, BTO, NCIT Exceptions: Allowed Other Sources: wikidata ----- Conditional - (Disease) [Source characteristic_type_ref.accession = EFO:0000408] Ontology Sources:DOID, HP, MP ----- Conditional - (Cell type) [Source characteristic_type_ref.accession = EFO:0000324] Ontology Sources:CL -----
characteristic-definition	used-in	has-characteristic-definition	study	0	N	Required min count in the dataset: 2.

Embedded Relationships: characteristic-type

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
characteristic-value	instance-of	has-instance	characteristic-definition	1	N	Required min count in the dataset: 2.
study	has-characteristic-definition	used-in	characteristic-definition	2	N	Required min count in the dataset: 2.

Derived Data File

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be derived-data-file
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
name	required	str	Name of the file. File MUST be a file (not folder or link).It MAY be relative path (e.g., FILES/study.txt) or a file in a compressed file (e.g., FILES/study.zip#data/metadata.tsv) Minimum length: 2 Validation Rule: Min Length: 2, Required
size	optional	int	The size of the file in bytes, representing the total amount of data contained in the file
hash_sha256	optional	str	The SHA-256 cryptographic hash of the file content, used to verify file integrity and ensure that the file has not been altered
format_ref	required	CvTermObjectId	The structure or encoding used to store the contents of the file, typically indicated by its extension (e.g., .txt, .csv, .mzML, .raw, etc.) Target CV term type: descriptor Validation Rule: Allowed Parent CV Terms: * [EDAM, EDAM:1915, Format] Allow parent CV Term: No Allow only leaf CV Terms: No
compression_format_ref	optional	CvTermObjectId	The structure or encoding used to compress the contents of the file, typically indicated by its extension (e.g., .zip, .tar, .gz, etc.) Target CV term type: descriptor Validation Rule: Allowed Parent CV Terms: * [EDAM, EDAM:1915, Format] Allow parent CV Term: No Allow only leaf CV Terms: No
extension	optional	str	The extension of file. It MUST contain all extensions (e.g., .raw, .mzML, .d.zip, .raw.zip, etc.)

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
derived-data-file	created-in	has-derived-data-file	assay	0	N
derived-data-file	created-in	has-derived-data-file	study	1	1
derived-data-file	described-as	describes	descriptor	0	N	A link to a descriptor that describes the derived data file.
derived-data-file	referenced-in	references	metadata-file	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
assay	has-derived-data-file	created-in	derived-data-file	0	N	A link to a descriptor that describes the assay.
descriptor	describes	described-as	derived-data-file	0	N
metadata-file	references	referenced-in	derived-data-file	0	N
study	has-derived-data-file	created-in	derived-data-file	0	N

Factor Definition

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be factor-definition
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
name	required	str	Minimum length: 2 Validation Rule: Min Length: 2, Required
factor_type_ref	required	CvTermObjectId	Target CV term type: factor-type Validation Rules: Target node type: factor-type Allowed CV Terms: * [EFO, EFO:0000408, disease]

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
factor-definition	has-instance	instance-of	factor-value	0	N	Target Validation Rule: ----- Conditional - (Disease) [Source factor_type_ref.accession = EFO:0000408] Ontology Sources:DOID, HP, MP -----
factor-definition	used-in	has-factor-definition	study	0	N

Embedded Relationships: factor-type

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
factor-value	instance-of	has-instance	factor-definition	1	N
study	has-factor-definition	used-in	factor-definition	0	N

Metabolite

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be metabolite
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
name	required	str	Minimum length: 2 Validation Rule: Min Length: 2, Required

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
metabolite	described-as	describes	descriptor	0	N
metabolite	identified-as	reported-identifier-of	metabolite-identifier	0	N	Target Validation Rule: ----- Allowed Parent CV Terms: * [CHEMINF, CHEMINF:000464, chemical database identifier] Allow parent CV Term: No Allow only leaf CV Terms: No -----
metabolite	reported-in	reports	study	1	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	metabolite	0	N
metabolite-identifier	reported-identifier-of	identified-as	metabolite	1	N
study	reports	reported-in	metabolite	0	N

Metadata File

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be metadata-file
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	required	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term Minimum length: 1 Validation Rule: Min Length: 1, Required
name	required	str	Name of the file. File MUST be a file (not folder or link).It MAY be relative path (e.g., FILES/study.txt) or a file in a compressed file (e.g., FILES/study.zip#data/metadata.tsv) Minimum length: 2 Validation Rule: Min Length: 2, Required
size	optional	int	The size of the file in bytes, representing the total amount of data contained in the file
hash_sha256	optional	str	The SHA-256 cryptographic hash of the file content, used to verify file integrity and ensure that the file has not been altered
format_ref	required	CvTermObjectId	The structure or encoding used to store the contents of the file, typically indicated by its extension (e.g., .txt, .csv, .mzML, .raw, etc.) Target CV term type: descriptor Validation Rule: Allowed Parent CV Terms: * [EDAM, EDAM:1915, Format] Allow parent CV Term: No Allow only leaf CV Terms: No
compression_format_ref	optional	CvTermObjectId	The structure or encoding used to compress the contents of the file, typically indicated by its extension (e.g., .zip, .tar, .gz, etc.) Target CV term type: descriptor Validation Rule: Allowed Parent CV Terms: * [EDAM, EDAM:1915, Format] Allow parent CV Term: No Allow only leaf CV Terms: No
extension	required	str	The extension of file. It MUST contain all extensions (e.g., .raw, .mzML, .d.zip, .raw.zip, etc.)

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
metadata-file	describes	has-metadata-file	study	1	N	Required min count in the dataset: 1.
metadata-file	referenced-in	references	metadata-file	0	N
metadata-file	references	referenced-in	derived-data-file	0	N
metadata-file	references	referenced-in	raw-data-file	0	N
metadata-file	references	referenced-in	result-file	0	N
metadata-file	references	referenced-in	supplementary-file	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
derived-data-file	referenced-in	references	metadata-file	0	N
descriptor	describes	described-as	metadata-file	0	N
metadata-file	referenced-in	references	metadata-file	0	N
raw-data-file	referenced-in	references	metadata-file	0	N
result-file	referenced-in	references	metadata-file	0	N
study	has-metadata-file	describes	metadata-file	1	N	Required min count in the dataset: 1.
supplementary-file	referenced-in	references	metadata-file	0	N

Organization

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be organization
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
repository_identifier	optional	str
name	required	str	Minimum length: 2 Validation Rule: Min Length: 2, Required
department	optional	str
unit	optional	str
address	optional	str

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
organization	affiliates	affiliated-with	person	0	N
organization	coordinates	coordinated-by	project	0	N
organization	described-as	describes	descriptor	0	N
organization	funds	funded-by	project	0	N
organization	manages	managed-by	project	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	organization	0	N
person	affiliated-with	affiliates	organization	0	N
project	coordinated-by	coordinates	organization	0	N
project	funded-by	funds	organization	0	N
project	managed-by	manages	organization	0	N

Parameter Definition

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be parameter-definition
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
name	required	str	Minimum length: 2 Validation Rule: Min Length: 2, Required
parameter_type_ref	required	CvTermObjectId	Target node type: parameter-type Validation Rule: Target node type: parameter-type

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
parameter-definition	has-instance	instance-of	parameter-value	0	N	Required min count in the dataset: 1. Target Validation Rule: ----- Conditional - (Mass spectrometry instrument) [Source parameter_type_ref.accession = MSIO:0000171] Allowed Parent CV Terms: * [MS, MS:1000031, instrument model] Allow parent CV Term: No Allow only leaf CV Terms: Yes Excluded CV Terms: * [MS, MS:1000491, Dionex instrument model], * [MS, MS:1000488, Hitachi instrument model] -----

Embedded Relationships: parameter-type

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
parameter-value	instance-of	has-instance	parameter-definition	1	N	Required min count in the dataset: 1.
protocol	has-parameter-definition	defined-in	parameter-definition	0	N	Required min count in the dataset: 1.

Person

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The value of this property MUST be 'person' Its value MUST be person
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
full_name	optional	str	Full name of person
orcid	optional	str	ORCID identifier of person Example: "1234-0001-8473-1713" "1234-0001-8473-171X"
emails	optional	list[EmailStr]	Email addresses of person
phones	optional	list[str]	Phone number of person (with international country code) Example: [ "+449340917271", "00449340917271" ]
addresses	optional	list[str]

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
person	affiliated-with	affiliates	organization	0	N
person	author-of	has-author	publication	0	N
person	contributes	has-contributor	project	0	N
person	contributes	has-contributor	study	0	N
person	described-as	describes	descriptor	0	N
person	principal-investigator-of	has-principal-investigator	study	0	N	Required min count in the dataset: 1.
person	submits	submitted-by	study	0	1	Required min count in the dataset: 1.

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	person	0	N
organization	affiliates	affiliated-with	person	0	N
project	has-contributor	contributes	person	0	N
publication	has-author	author-of	person	0	N
study	has-contributor	contributes	person	0	N
study	has-principal-investigator	principal-investigator-of	person	0	N	Required min count in the dataset: 1.
study	submitted-by	submits	person	1	N	Required min count in the dataset: 1.

Project

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be project
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
title	required	str	Minimum length: 2 Validation Rule: Min Length: 2, Required
description	optional	str
grant_identifiers	optional	list[Annotated]
doi	optional	str

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
project	coordinated-by	coordinates	organization	0	N
project	described-as	describes	descriptor	0	N
project	funded-by	funds	organization	0	N
project	has-contributor	contributes	person	0	N
project	has-publication	describes	publication	0	N
project	has-study	part-of	study	0	N
project	managed-by	manages	organization	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	project	0	N
organization	coordinates	coordinated-by	project	0	N
organization	funds	funded-by	project	0	N
organization	manages	managed-by	project	0	N
person	contributes	has-contributor	project	0	N
publication	describes	has-publication	project	0	N
study	part-of	has-study	project	0	N

Protocol

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be protocol
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
name	required	str
protocol_type_ref	required	CvTermObjectId	Target CV term type: protocol-type Validation Rules: Target node type: protocol-type Allowed CV Terms: * [EFO, EFO:0005518, sample collection protocol], * [MS, MS:1000831, sample preparation], * [CHMO, CHMO:0000470, mass spectrometry], * [OBI, OBI:0200000, data transform], * [MI, MI:2131, metabolite identification], * [CHMO, CHMO:0001000, chromatography], * [EFO, EFO:0003969, treatment protocol], * [CHMO, CHMO:0001024, capillary electrophoresis], * [MS, MS:1000058, flow injection analysis] Exceptions: Allowed Other Sources: wikidata
description	required	str
parameter_definition_refs	optional	list[MhdObjectId]	Target node type: parameter-definition

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
protocol	described-as	describes	descriptor	0	N
protocol	has-parameter-definition	defined-in	parameter-definition	0	N	Required min count in the dataset: 1.
protocol	used-in	follows	assay	0	N
protocol	used-in	has-protocol	study	1	N	Required min count in the dataset: 1.

Embedded Relationships: protocol-type

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
assay	follows	used-in	protocol	0	N	A link to a protocol conducted in assay.
descriptor	describes	described-as	protocol	0	N
study	has-protocol	used-in	protocol	0	N	Required min count in the dataset: 1.

Publication

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be publication
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
title	required	str
doi	required	str
pub_med_id	optional	str
authors	optional	list[Annotated]

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
publication	described-as	describes	descriptor	0	N
publication	describes	has-publication	project	0	N
publication	describes	has-publication	study	0	1
publication	has-author	author-of	person	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	publication	0	N
person	author-of	has-author	publication	0	N
project	has-publication	describes	publication	0	N
study	has-publication	describes	publication	0	N

Raw Data File

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be raw-data-file
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	required	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term Minimum length: 1 Validation Rule: Min Length: 1, Required
name	required	str	Name of the file. File MUST be a file (not folder or link).It MAY be relative path (e.g., FILES/study.txt) or a file in a compressed file (e.g., FILES/study.zip#data/metadata.tsv) Minimum length: 2 Validation Rule: Min Length: 2, Required
size	optional	int	The size of the file in bytes, representing the total amount of data contained in the file
hash_sha256	optional	str	The SHA-256 cryptographic hash of the file content, used to verify file integrity and ensure that the file has not been altered
format_ref	required	CvTermObjectId	The structure or encoding used to store the contents of the file, typically indicated by its extension (e.g., .txt, .csv, .mzML, .raw, etc.) Target CV term type: descriptor Validation Rule: Allowed Parent CV Terms: * [EDAM, EDAM:1915, Format] Allow parent CV Term: No Allow only leaf CV Terms: No
compression_format_ref	optional	CvTermObjectId	The structure or encoding used to compress the contents of the file, typically indicated by its extension (e.g., .zip, .tar, .gz, etc.) Target CV term type: descriptor Validation Rule: Allowed Parent CV Terms: * [EDAM, EDAM:1915, Format] Allow parent CV Term: No Allow only leaf CV Terms: No
extension	optional	str	The extension of file. It MUST contain all extensions (e.g., .raw, .mzML, .d.zip, .raw.zip, etc.)

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
raw-data-file	created-in	has-raw-data-file	study	1	1	Required min count in the dataset: 1.
raw-data-file	described-as	describes	descriptor	0	N
raw-data-file	referenced-in	references	metadata-file	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	raw-data-file	0	N
metadata-file	references	referenced-in	raw-data-file	0	N
study	has-raw-data-file	created-in	raw-data-file	1	N	Required min count in the dataset: 1.

Result File

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be result-file
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	required	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term Minimum length: 1 Validation Rule: Min Length: 1, Required
name	required	str	Name of the file. File MUST be a file (not folder or link).It MAY be relative path (e.g., FILES/study.txt) or a file in a compressed file (e.g., FILES/study.zip#data/metadata.tsv) Minimum length: 2 Validation Rule: Min Length: 2, Required
size	optional	int	The size of the file in bytes, representing the total amount of data contained in the file
hash_sha256	optional	str	The SHA-256 cryptographic hash of the file content, used to verify file integrity and ensure that the file has not been altered
format_ref	required	CvTermObjectId	The structure or encoding used to store the contents of the file, typically indicated by its extension (e.g., .txt, .csv, .mzML, .raw, etc.) Target CV term type: descriptor Validation Rule: Allowed Parent CV Terms: * [EDAM, EDAM:1915, Format] Allow parent CV Term: No Allow only leaf CV Terms: No
compression_format_ref	optional	CvTermObjectId	The structure or encoding used to compress the contents of the file, typically indicated by its extension (e.g., .zip, .tar, .gz, etc.) Target CV term type: descriptor Validation Rule: Allowed Parent CV Terms: * [EDAM, EDAM:1915, Format] Allow parent CV Term: No Allow only leaf CV Terms: No
extension	optional	str	The extension of file. It MUST contain all extensions (e.g., .raw, .mzML, .d.zip, .raw.zip, etc.)

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
result-file	created-in	has-result-file	study	1	N
result-file	described-as	describes	descriptor	0	N
result-file	referenced-in	references	metadata-file	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	result-file	0	N
metadata-file	references	referenced-in	result-file	0	N
study	has-result-file	created-in	result-file	0	N

Sample

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be sample
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
name	required	str	Minimum length: 1 Validation Rule: Min Length: 1, Required
repository_identifier	required	str
additional_identifiers	optional	list[CvTermValue]
subject_refs	required	list[MhdObjectId]	Minimum length: 1 Target node type: subject Validation Rule: Min Length: 1, Required

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
sample	derived-from	source-of	subject	1	N
sample	described-as	describes	descriptor	0	N
sample	has-factor-value	value-of	factor-value	0	N
sample	used-in	has-sample	study	1	1

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	sample	0	N
factor-value	value-of	has-factor-value	sample	1	N
study	has-sample	used-in	sample	0	N
subject	source-of	derived-from	sample	1	N

Sample Run

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be sample-run
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
name	optional	str
sample_ref	required	MhdObjectId	Target node type: sample
sample_run_configuration_refs	optional	list[MhdObjectId]	Target node type: sample-run-configuration
raw_data_file_refs	required	list[MhdObjectId]	Minimum length: 1 Target node type: raw-data-file Validation Rule: Min Length: 1, Required
derived_data_file_refs	optional	list[MhdObjectId]	Target node type: derived-data-file
result_file_refs	optional	list[MhdObjectId]	Target node type: result-file
supplementary_file_refs	optional	list[MhdObjectId]	Target node type: supplementary-file

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
sample-run	described-as	describes	descriptor	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	sample-run	0	N

Sample Run Configuration

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be sample-run-configuration
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
protocol_ref	required	MhdObjectId	Target node type: protocol
parameter_value_refs	optional	list[MhdObjectId or CvTermObjectId or CvTermValueObjectId]	Target node type: parameter-value

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	sample-run-configuration	0	N

Study

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be study
created_by_ref	required	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
mhd_identifier	required	str	Minimum length: 8 Validation Rule: Min Length: 8, Required
repository_identifier	optional	str
additional_identifiers	optional	list[KeyValue]	Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
title	required	str	Minimum length: 2 Validation Rule: Min Length: 2, Required
description	required	str	Minimum length: 5 Validation Rule: Min Length: 5, Required
submission_date	required	datetime
public_release_date	required	datetime
dataset_license	required	HttpUrl	Example: "https://creativecommons.org/publicdomain/zero/1.0"
dataset_uri_list	optional	list[KeyValue]
related_datasets	optional	list[KeyValue]
protocol_refs	required	list[MhdObjectId]	Target node type: protocol

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
study	defines	defined-in	characteristic-type	2	N	Required min count in the dataset: 2.
study	described-as	describes	descriptor	0	N
study	has-assay	part-of	assay	1	N	Required min count in the dataset: 1.
study	has-characteristic-definition	used-in	characteristic-definition	2	N	Required min count in the dataset: 2.
study	has-contributor	contributes	person	0	N
study	has-derived-data-file	created-in	derived-data-file	0	N
study	has-factor-definition	used-in	factor-definition	0	N
study	has-metadata-file	describes	metadata-file	1	N	Required min count in the dataset: 1.
study	has-principal-investigator	principal-investigator-of	person	0	N	Required min count in the dataset: 1.
study	has-protocol	used-in	protocol	0	N	Required min count in the dataset: 1.
study	has-publication	describes	publication	0	N
study	has-raw-data-file	created-in	raw-data-file	1	N	Required min count in the dataset: 1.
study	has-repository-keyword	keyword-of	descriptor	0	N
study	has-result-file	created-in	result-file	0	N
study	has-sample	used-in	sample	0	N
study	has-submitter-keyword	keyword-of	descriptor	0	N	Target Validation Rule: ----- Allow any valid CV Term Exceptions: Allowed Placeholder Values: source='' accession='' Allowed Other Sources: wikidata -----
study	has-supplementary-file	created-in	supplementary-file	0	N
study	part-of	has-study	project	0	N
study	reports	reported-in	metabolite	0	N
study	submitted-by	submits	person	1	N	Required min count in the dataset: 1.

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
assay	part-of	has-assay	study	1	1	A link to a study that the assay was conducted as part of it to generate data addressing study objectives Required min count in the dataset: 1.
characteristic-definition	used-in	has-characteristic-definition	study	0	N	Required min count in the dataset: 2.
characteristic-type	defined-in	defines	study	1	1	Required min count in the dataset: 2.
data-provider	provides	provided-by	study	0	N
derived-data-file	created-in	has-derived-data-file	study	1	1
descriptor	describes	described-as	study	0	N
descriptor	keyword-of	has-repository-keyword	study	0	N
factor-definition	used-in	has-factor-definition	study	0	N
factor-type	used-in	use-factor-type	study	0	N
metabolite	reported-in	reports	study	1	N
metadata-file	describes	has-metadata-file	study	1	N	Required min count in the dataset: 1.
person	contributes	has-contributor	study	0	N
person	principal-investigator-of	has-principal-investigator	study	0	N	Required min count in the dataset: 1.
person	submits	submitted-by	study	0	1	Required min count in the dataset: 1.
project	has-study	part-of	study	0	N
protocol	used-in	has-protocol	study	1	N	Required min count in the dataset: 1.
publication	describes	has-publication	study	0	1
raw-data-file	created-in	has-raw-data-file	study	1	1	Required min count in the dataset: 1.
result-file	created-in	has-result-file	study	1	N
sample	used-in	has-sample	study	1	1
supplementary-file	created-in	has-supplementary-file	study	1	N

Subject

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be subject
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	optional	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term
name	required	str	Minimum length: 1 Validation Rule: Min Length: 1, Required
subject_type	optional	CvTerm
repository_identifier	required	str	Minimum length: 1 Validation Rule: Min Length: 1, Required

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
subject	described-as	describes	descriptor	0	N
subject	has-characteristic-value	value-of	characteristic-value	2	N
subject	source-of	derived-from	sample	1	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
characteristic-value	value-of	has-characteristic-value	subject	1	N
descriptor	describes	described-as	subject	0	N
sample	derived-from	source-of	subject	1	N

Supplementary File

Properties

Property Name	Necessity	Type	Description
id	optional	MhdObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the object Its value MUST be supplementary-file
created_by_ref	optional	CvTermValueObjectId	The id property of the data-provider who created the object Target CV term type: data-provider Validation Rule: Allow any valid CV Term Exceptions: Allowed Other Sources: wikidata
tags	optional	list[KeyValue]	Key-value tags related to the object
descriptors	optional	list[CvTerm]	Descriptors of the object
external_references	optional	list[KeyValue]	External references related to the object
uri_list	required	list[KeyValue]	URI list related to the object. Key MUST be uri type CV Term Minimum length: 1 Validation Rule: Min Length: 1, Required
name	required	str	Name of the file. File MUST be a file (not folder or link).It MAY be relative path (e.g., FILES/study.txt) or a file in a compressed file (e.g., FILES/study.zip#data/metadata.tsv) Minimum length: 2 Validation Rule: Min Length: 2, Required
size	optional	int	The size of the file in bytes, representing the total amount of data contained in the file
hash_sha256	optional	str	The SHA-256 cryptographic hash of the file content, used to verify file integrity and ensure that the file has not been altered
format_ref	required	CvTermObjectId	The structure or encoding used to store the contents of the file, typically indicated by its extension (e.g., .txt, .csv, .mzML, .raw, etc.) Target CV term type: descriptor Validation Rule: Allowed Parent CV Terms: * [EDAM, EDAM:1915, Format] Allow parent CV Term: No Allow only leaf CV Terms: No
compression_format_ref	optional	CvTermObjectId	The structure or encoding used to compress the contents of the file, typically indicated by its extension (e.g., .zip, .tar, .gz, etc.) Target CV term type: descriptor Validation Rule: Allowed Parent CV Terms: * [EDAM, EDAM:1915, Format] Allow parent CV Term: No Allow only leaf CV Terms: No
extension	optional	str	The extension of file. It MUST contain all extensions (e.g., .raw, .mzML, .d.zip, .raw.zip, etc.)

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
supplementary-file	created-in	has-supplementary-file	study	1	N
supplementary-file	described-as	describes	descriptor	0	N
supplementary-file	referenced-in	references	metadata-file	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	supplementary-file	0	N
metadata-file	references	referenced-in	supplementary-file	0	N
study	has-supplementary-file	created-in	supplementary-file	0	N

MHD CV Term Objects

Characteristic Type

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term object Its value MUST be characteristic-type
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
characteristic-type	defined-in	defines	study	1	1	Required min count in the dataset: 2.
characteristic-type	type-of	has-type	characteristic-value	0	N	Required min count in the dataset: 2.

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
study	defines	defined-in	characteristic-type	2	N	Required min count in the dataset: 2.

Characteristic Value

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermValueObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term Value object Its value MUST be characteristic-value
value	optional	str or int or float or Decimal
unit	optional	UnitCvTerm
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
characteristic-value	instance-of	has-instance	characteristic-definition	1	N	Required min count in the dataset: 2.
characteristic-value	value-of	has-characteristic-value	subject	1	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
characteristic-definition	has-instance	instance-of	characteristic-value	0	N	Required min count in the dataset: 2.
characteristic-type	type-of	has-type	characteristic-value	0	N	Required min count in the dataset: 2.
subject	has-characteristic-value	value-of	characteristic-value	2	N

Data Provider

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermValueObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term Value object Its value MUST be data-provider
value	required	str
unit	optional	UnitCvTerm
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
data-provider	provides	provided-by	study	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description

Descriptor

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term object Its value MUST be descriptor
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
descriptor	describes	described-as	assay	0	N
descriptor	describes	described-as	study	0	N
descriptor	describes	described-as	metadata-file	0	N
descriptor	describes	described-as	raw-data-file	0	N
descriptor	describes	described-as	derived-data-file	0	N
descriptor	describes	described-as	supplementary-file	0	N
descriptor	describes	described-as	result-file	0	N
descriptor	describes	described-as	metabolite	0	N
descriptor	describes	described-as	organization	0	N
descriptor	describes	described-as	person	0	N
descriptor	describes	described-as	project	0	N
descriptor	describes	described-as	publication	0	N
descriptor	describes	described-as	protocol	0	N
descriptor	describes	described-as	sample	0	N
descriptor	describes	described-as	subject	0	N
descriptor	describes	described-as	sample-run	0	N
descriptor	describes	described-as	sample-run-configuration	0	N
descriptor	keyword-of	has-repository-keyword	study	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
assay	described-as	describes	descriptor	0	N	A link to a descriptor that describes the assay.
derived-data-file	described-as	describes	descriptor	0	N	A link to a descriptor that describes the derived data file.
metabolite	described-as	describes	descriptor	0	N
organization	described-as	describes	descriptor	0	N
person	described-as	describes	descriptor	0	N
project	described-as	describes	descriptor	0	N
protocol	described-as	describes	descriptor	0	N
publication	described-as	describes	descriptor	0	N
raw-data-file	described-as	describes	descriptor	0	N
result-file	described-as	describes	descriptor	0	N
sample	described-as	describes	descriptor	0	N
sample-run	described-as	describes	descriptor	0	N
study	described-as	describes	descriptor	0	N
study	has-repository-keyword	keyword-of	descriptor	0	N
study	has-submitter-keyword	keyword-of	descriptor	0	N
subject	described-as	describes	descriptor	0	N
supplementary-file	described-as	describes	descriptor	0	N

Factor Type

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term object Its value MUST be factor-type
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
factor-type	type-of	has-type	factor-value	0	N
factor-type	used-in	use-factor-type	study	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description

Factor Value

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermValueObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term Value object Its value MUST be factor-value
value	optional	str or int or float or Decimal
unit	optional	UnitCvTerm
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
factor-value	instance-of	has-instance	factor-definition	1	N
factor-value	value-of	has-factor-value	sample	1	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
factor-definition	has-instance	instance-of	factor-value	0	N
factor-type	type-of	has-type	factor-value	0	N
sample	has-factor-value	value-of	factor-value	0	N

Metabolite Identifier

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term object Its value MUST be metabolite-identifier
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
metabolite-identifier	reported-identifier-of	identified-as	metabolite	1	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
metabolite	identified-as	reported-identifier-of	metabolite-identifier	0	N

Parameter Type

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term object Its value MUST be parameter-type
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
parameter-type	type-of	has-type	parameter-value	0	N

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
parameter-value	has-type	type-of	parameter-type	1	N	Required min count in the dataset: 1.

Parameter Value

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermValueObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term Value object Its value MUST be parameter-value
value	optional	str or int or float or Decimal
unit	optional	UnitCvTerm
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
parameter-value	has-type	type-of	parameter-type	1	N	Required min count in the dataset: 1.
parameter-value	instance-of	has-instance	parameter-definition	1	N	Required min count in the dataset: 1.

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description
parameter-definition	has-instance	instance-of	parameter-value	0	N	Required min count in the dataset: 1.
parameter-type	type-of	has-type	parameter-value	0	N

Protocol Type

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term object Its value MUST be protocol-type
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description

Uri Type

Properties

Property Name	Necessity	Type	Description
id	optional	CvTermObjectId	The id property uniquely identifies the object
type	optional	MhdObjectType	The type property identifies type of the CV Term object Its value MUST be uri-type
source	optional	str	Ontology source name
accession	optional	str	Accession number of CV term in compact URI format
name	optional	str	Label of CV term

Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description

Reverse Node Relationships

Source	Relationship	Reverse Name	Target	Min	Max	Description