Organic measures

organic_measures

This table records isotopic measurements related to organic proxies, such as stable isotope ratios (e.g., δ13C, δ15N) derived from bones, seeds, wood, or other biological samples. These measurements provide insights into past diets, environmental conditions, or ecological interactions.

Sample identifier

sample_id

Sample identifier is a unique identifier assigned first by the compiler and then by the IsoArcH database to each collected sample. In each dataset, these numbers will span from 1 to n, with n representing the maximum number of samples compiled. Once in the IsoArcH database, this identifier will include the dataset number as a prefix. GRIST may automatically populate this field. Example: 1

Type	Required	Table
identifier	yes	samples, organic_measures, mineral_measures, radiocarbon_measures, amino_acid_measures

Dataset DOI

dataset_doi

This field contains the Digital Object Identifier (DOI) assigned to the dataset. It provides a unique and permanent identifier for the dataset, ensuring it can be accurately cited and easily retrieved in digital repositories associated with IsoArcH. In the case of compilations, the IsoArcH DOI also references the original source works included in the dataset, providing proper attribution and a direct link to the foundational research.

Type	Required	Table
string	no	datasets, organic_measures, mineral_measures, radiocarbon_measures, amino_acid_measures

Database name

database_name

This field contains the official name of the source database. It is used specifically to identify and refer to the external database that provided the data, ensuring proper attribution.

Type	Required	Table
string	no	databases, organic_measures, mineral_measures, radiocarbon_measures, amino_acid_measures

Sampled zone identifier

sampled_zone_id

Serial order enables the numbering of sequential samplings taken from a specific sample, typically from dentine, enamel, or hair.

Type	Required	Table
string	no	organic_measures, mineral_measures, radiocarbon_measures, amino_acid_measures

Tooth fraction

tooth_fraction

Tooth fraction refers to the particular portion of the tooth that has been sampled.

Type	Required	Validations	Table
string	no	Lowercase: yes	organic_measures, mineral_measures, radiocarbon_measures, amino_acid_measures

Allowed Values:

• dentine
• enamel
• pulp

Analytical parameters identifier

analytical_parameters_id

This field contains the unique identifier for the set of analytical parameters associated with a specific analysis.

Type	Required	Table
identifier	no	organic_measures, mineral_measures, radiocarbon_measures, amino_acid_measures, analytical_parameters

Instrumentation

instrumentation

This field specifies the type of instrument or equipment used to conduct the analysis and obtain the measured values.

Type	Required	Table
string	no	organic_measures, mineral_measures, radiocarbon_measures, amino_acid_measures

Run identifier

run_id

This field contains a unique identifier for a specific analytical run or session in which data were collected.

Type	Required	Table
identifier	no	organic_measures, mineral_measures, radiocarbon_measures, amino_acid_measures

Run date

run_date

This field records the date when a specific analytical run or session was performed, documenting when the data were collected to ensure traceability. The date should be entered in the format YYYY-MM-DD (e.g., 2024-11-07).

Type	Required	Table
string	no	organic_measures, mineral_measures, radiocarbon_measures, amino_acid_measures

Result type

result_type

Result type is a field that enables specification of the type of measured value being reported. When multiple values, such as a range, are applicable to a specific sample, this field should be completed multiple times, each on a separate line.

Type	Required	Validations	Table
string	no	Lowercase: yes	organic_measures, mineral_measures, radiocarbon_measures

Allowed Values:

• min
• max
• mean
• exact

collagen yield (%)

collagen_yield

Type	Required	Table
decimal	no	organic_measures

%C

percent_c

Type	Required	Table
decimal	no	organic_measures

%N

percent_n

Type	Required	Table
decimal	no	organic_measures

C:N

c_n

Type	Required	Table
decimal	no	organic_measures

%S

percent_s

Type	Required	Table
decimal	no	organic_measures

N:S

n_s

Type	Required	Table
decimal	no	organic_measures

C:S

c_s

Type	Required	Table
decimal	no	organic_measures

δ13C (‰vpdb)

d13c_vpdb

Type	Required	Unit/Norm	Table
decimal	no	‰vpdb	organic_measures

δ13C (‰vpdb) uncertainty

d13c_vpdb_uncertainty

Type	Required	Unit/Norm	Table
decimal	no	‰vpdb	organic_measures

δ13C uncertainty type

d13c_uncertainty_type

Type	Required	Validations	Table
string	no	Lowercase: yes	organic_measures

Allowed Values:

• sd
• 2sd
• se
• 2se

δ15N (‰air)

d15n_air

Type	Required	Unit/Norm	Table
decimal	no	‰air	organic_measures

δ15N (‰air) uncertainty

d15n_air_uncertainty

Type	Required	Unit/Norm	Table
decimal	no	‰air	organic_measures

δ15N uncertainty type

d15n_uncertainty_type

Type	Required	Validations	Table
string	no	Lowercase: yes	organic_measures

Allowed Values:

• sd
• 2sd
• se
• 2se

δ34S (‰vcdt)

d34s_vcdt

Type	Required	Unit/Norm	Table
decimal	no	‰vcdt	organic_measures

δ34S (‰vcdt) uncertainty

d34s_vcdt_uncertainty

Type	Required	Unit/Norm	Table
decimal	no	‰vcdt	organic_measures

δ34S uncertainty type

d34s_uncertainty_type

Type	Required	Validations	Table
string	no	Lowercase: yes	organic_measures

Allowed Values:

• sd
• 2sd
• se
• 2se