POSC Specifications: Epicentre Version 3.0 | Logical Data Model |
This change defines a new characteristic for a component material type. This property a specific isotope ratio for a type of material within a sample.
CHANGE ESM_pty_isotope_ratio ALTER ENTITY bulk_material; INVERSE ADD pty_isotope_ratio : SET [0:?] OF pty_isotope_ratio FOR bulk_material (*<desc> This is an isotope ratio measured for the material class in the bulk material being characterized.*) (*<verb>have a property of*); END_ENTITY; ADD ENTITY pty_isotope_ratio (*<desc>This describes the ratio of a measured isotope to a reference isotope.*) SUBTYPE OF (property); bulk_material : OPTIONAL bulk_material (*<desc> This is the material in which the isotope ratio is measured.*) (*<verb>be a property of*); data_value : ndt_real4 (*<desc> This is the isotope ratio.*); measured_isotope : material_class (*<desc> This is the measured isotope - numerator value of ratio.*) (*<verb>measure*); referenced_isotope : material_class (*<desc> This is the reference isotope - denominator value.*) (*<verb>be measured with respect to*); UNIQUE si: bulk_material, measured_isotope, referenced_isotope, activity; END_ENTITY; ALTER ENTITY material_class; INVERSE ADD measured_isotope : SET[0:?] OF pty_isotope_ratio FOR measured_isotope (*<desc>This describes the use of an isotope as the measured value against a reference isotope.*) (*<verb>be measured as*); ADD referenced_isotope : SET[0:?] OF pty_isotope_ratio FOR referenced_isotope (*<desc>This describes the use of an isotope as the referenced value for a measured isotope ratio.*) (*<verb>be referenced in*); END_ENTITY; END_CHANGE;