## NMR-STAR dictionary: database table: CouplingConstant

Detailed description of the fields

### _Coupling_constant.ID (CouplingConstantID)

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NMR-STAR tag name | _Coupling_constant.ID
Description | NMR-STAR name: _Coupling_constant.ID An integer value that is a unique identifier for the coupling constant value.
Database field name | CouplingConstantID
SQL Database type | INTEGER
Part of primary Key | yes
Foreign Key on table, column | ,
Saveframe ID | yes: This tag contains the identifier for this saveframe in the entry.
Row Index | yes: This tag contains the index of this row in the loop, which is used when the data is loaded into a database which has a relational model in which ordering doesn't matter
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | ID
Examples | ?
Help text |

### _Coupling_constant.Code (Code)

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NMR-STAR tag name | _Coupling_constant.Code
Description | NMR-STAR name: _Coupling_constant.Code A code that defines the atoms involved in the coupling constant and the number of bonds between the named atoms. The code is generated on the basis of the standard nomenclature for coupling constants used in the NMR community.
Database field name | Code
SQL Database type | VARCHAR(31)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Code
Examples | ?
Help text |

### _Coupling_constant.Assembly_atom_ID_1 (AssemblyAtomID1)

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NMR-STAR tag name | _Coupling_constant.Assembly_atom_ID_1
Description | NMR-STAR name: _Coupling_constant.Assembly_atom_ID_1 Pointer to '_Atom.Assembly_atom_ID'
Database field name | AssemblyAtomID1
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Atom, Assembly_atom_ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Assembly atom ID 1
Examples | ?
Help text |

### _Coupling_constant.Entity_assembly_ID_1 (EntityAssemblyID1)

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NMR-STAR tag name | _Coupling_constant.Entity_assembly_ID_1
Description | NMR-STAR name: _Coupling_constant.Entity_assembly_ID_1 Pointer to '_Entity_assembly.ID'
Database field name | EntityAssemblyID1
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Entity_assembly, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Entity assembly ID 1
Examples | ?
Help text |

### _Coupling_constant.Entity_ID_1 (EntityID1)

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NMR-STAR tag name | _Coupling_constant.Entity_ID_1
Description | NMR-STAR name: _Coupling_constant.Entity_ID_1 Pointer to '_Entity.ID'
Database field name | EntityID1
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Entity, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Entity ID 1
Examples | ?
Help text |

### _Coupling_constant.Comp_index_ID_1 (CompIndexID1)

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NMR-STAR tag name | _Coupling_constant.Comp_index_ID_1
Description | NMR-STAR name: _Coupling_constant.Comp_index_ID_1 Pointer to '_Entity_comp_index.ID'
Database field name | CompIndexID1
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Entity_comp_index, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Comp index ID 1
Examples | ?
Help text |

### _Coupling_constant.Seq_ID_1 (SeqID1)

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NMR-STAR tag name | _Coupling_constant.Seq_ID_1
Description | NMR-STAR name: _Coupling_constant.Seq_ID_1 Pointer to '_PDBX_poly_seq_scheme.Seq_ID'
Database field name | SeqID1
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Entity_poly_seq, Num
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Seq ID 1
Examples | ?
Help text |

### _Coupling_constant.Comp_ID_1 (CompID1)

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NMR-STAR tag name | _Coupling_constant.Comp_ID_1
Description | NMR-STAR name: _Coupling_constant.Comp_ID_1 Pointer to '_Chem_comp.ID'
Database field name | CompID1
SQL Database type | CHAR(12)
Part of primary Key | no
Foreign Key on table, column | Chem_comp, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Comp ID 1
Examples | ?
Help text |

### _Coupling_constant.Atom_ID_1 (AtomID1)

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NMR-STAR tag name | _Coupling_constant.Atom_ID_1
Description | NMR-STAR name: _Coupling_constant.Atom_ID_1 Pointer to '_Chem_comp_atom.Atom_ID'
Database field name | AtomID1
SQL Database type | CHAR(12)
Part of primary Key | no
Foreign Key on table, column | Chem_comp_atom, Atom_ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Atom ID 1
Examples | ?
Help text |

### _Coupling_constant.Atom_type_1 (AtomType1)

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NMR-STAR tag name | _Coupling_constant.Atom_type_1
Description | NMR-STAR name: _Coupling_constant.Atom_type_1 Standard symbol used to define the atom element type.
Database field name | AtomType1
SQL Database type | VARCHAR(15)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Atom type 1
Examples | ?
Help text |

### _Coupling_constant.Atom_isotope_number_1 (AtomIsotopeNumber1)

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NMR-STAR tag name | _Coupling_constant.Atom_isotope_number_1
Description | NMR-STAR name: _Coupling_constant.Atom_isotope_number_1 ?
Database field name | AtomIsotopeNumber1
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Atom isotope number 1
Examples | ?
Help text |

### _Coupling_constant.Ambiguity_code_1 (AmbiguityCode1)

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NMR-STAR tag name | _Coupling_constant.Ambiguity_code_1
Description | NMR-STAR name: _Coupling_constant.Ambiguity_code_1 A code indicating the presence of ambiguity in the assignment of the atom to the coupling constant value. This type of ambiguity can arise for geminal groups like the glycine alpha protons and other methylene groups.
Database field name | AmbiguityCode1
SQL Database type | VARCHAR(3)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Ambiguity code 1
Examples | ?
Help text |

### _Coupling_constant.Assembly_atom_ID_2 (AssemblyAtomID2)

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NMR-STAR tag name | _Coupling_constant.Assembly_atom_ID_2
Description | NMR-STAR name: _Coupling_constant.Assembly_atom_ID_2 Pointer to '_Atom.Assembly_atom_ID'
Database field name | AssemblyAtomID2
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Atom, Assembly_atom_ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Assembly atom ID 2
Examples | ?
Help text |

### _Coupling_constant.Entity_assembly_ID_2 (EntityAssemblyID2)

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NMR-STAR tag name | _Coupling_constant.Entity_assembly_ID_2
Description | NMR-STAR name: _Coupling_constant.Entity_assembly_ID_2 Pointer to '_Entity_assembly.ID'
Database field name | EntityAssemblyID2
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Entity_assembly, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Entity assembly ID 2
Examples | ?
Help text |

### _Coupling_constant.Entity_ID_2 (EntityID2)

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NMR-STAR tag name | _Coupling_constant.Entity_ID_2
Description | NMR-STAR name: _Coupling_constant.Entity_ID_2 Pointer to '_Entity.ID'
Database field name | EntityID2
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Entity, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Entity ID 2
Examples | ?
Help text |

### _Coupling_constant.Comp_index_ID_2 (CompIndexID2)

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NMR-STAR tag name | _Coupling_constant.Comp_index_ID_2
Description | NMR-STAR name: _Coupling_constant.Comp_index_ID_2 Pointer to '_Entity_comp_index.ID'
Database field name | CompIndexID2
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Entity_comp_index, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Comp index ID 2
Examples | ?
Help text |

### _Coupling_constant.Seq_ID_2 (SeqID2)

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NMR-STAR tag name | _Coupling_constant.Seq_ID_2
Description | NMR-STAR name: _Coupling_constant.Seq_ID_2 Pointer to '_PDBX_poly_seq_scheme.Seq_ID'
Database field name | SeqID2
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Entity_poly_seq, Num
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Seq ID 2
Examples | ?
Help text |

### _Coupling_constant.Comp_ID_2 (CompID2)

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NMR-STAR tag name | _Coupling_constant.Comp_ID_2
Description | NMR-STAR name: _Coupling_constant.Comp_ID_2 Pointer to '_Chem_comp.ID'
Database field name | CompID2
SQL Database type | CHAR(12)
Part of primary Key | no
Foreign Key on table, column | Chem_comp, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Comp ID 2
Examples | ?
Help text |

### _Coupling_constant.Atom_ID_2 (AtomID2)

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NMR-STAR tag name | _Coupling_constant.Atom_ID_2
Description | NMR-STAR name: _Coupling_constant.Atom_ID_2 Pointer to '_Chem_comp_atom.Atom_ID'
Database field name | AtomID2
SQL Database type | CHAR(12)
Part of primary Key | no
Foreign Key on table, column | Chem_comp_atom, Atom_ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Atom ID 2
Examples | ?
Help text |

### _Coupling_constant.Atom_type_2 (AtomType2)

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NMR-STAR tag name | _Coupling_constant.Atom_type_2
Description | NMR-STAR name: _Coupling_constant.Atom_type_2 Standard symbol used to define the atom element type.
Database field name | AtomType2
SQL Database type | VARCHAR(15)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Atom type 2
Examples | ?
Help text |

### _Coupling_constant.Atom_isotope_number_2 (AtomIsotopeNumber2)

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NMR-STAR tag name | _Coupling_constant.Atom_isotope_number_2
Description | NMR-STAR name: _Coupling_constant.Atom_isotope_number_2 ?
Database field name | AtomIsotopeNumber2
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Atom isotope number 2
Examples | ?
Help text |

### _Coupling_constant.Ambiguity_code_2 (AmbiguityCode2)

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NMR-STAR tag name | _Coupling_constant.Ambiguity_code_2
Description | NMR-STAR name: _Coupling_constant.Ambiguity_code_2 A code indicating the presence of ambiguity in the assignment of the atom to the coupling constant value. This type of ambiguity can arise for geminal groups like the glycine alpha protons and other methylene groups.
Database field name | AmbiguityCode2
SQL Database type | VARCHAR(3)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Ambiguity code 2
Examples | ?
Help text |

### _Coupling_constant.Val (Val)

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NMR-STAR tag name | _Coupling_constant.Val
Description | NMR-STAR name: _Coupling_constant.Val Scalar coupling constant value
Database field name | Val
SQL Database type | FLOAT
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Val
Examples | ?
Help text |

### _Coupling_constant.Val_min (ValMin)

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NMR-STAR tag name | _Coupling_constant.Val_min
Description | NMR-STAR name: _Coupling_constant.Val_min Minimum estimated value for a scalar coupling constant when a specific defined value cannot be obtained.
Database field name | ValMin
SQL Database type | FLOAT
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Val min
Examples | ?
Help text |

### _Coupling_constant.Val_max (ValMax)

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NMR-STAR tag name | _Coupling_constant.Val_max
Description | NMR-STAR name: _Coupling_constant.Val_max Maximum estimated value for a scalar coupling constant when a specific value cannot be obtained.
Database field name | ValMax
SQL Database type | FLOAT
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Val max
Examples | ?
Help text |

### _Coupling_constant.Val_err (ValErr)

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NMR-STAR tag name | _Coupling_constant.Val_err
Description | NMR-STAR name: _Coupling_constant.Val_err Estimated or measured error in the scalar coupling constant value.
Database field name | ValErr
SQL Database type | FLOAT
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Val err
Examples | ?
Help text |

### _Coupling_constant.Resonance_ID_1 (ResonanceID1)

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NMR-STAR tag name | _Coupling_constant.Resonance_ID_1
Description | NMR-STAR name: _Coupling_constant.Resonance_ID_1 Pointer to '_Resonance.ID'
Database field name | ResonanceID1
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Resonance, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Resonance ID 1
Examples | ?
Help text |

### _Coupling_constant.Resonance_ID_2 (ResonanceID2)

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NMR-STAR tag name | _Coupling_constant.Resonance_ID_2
Description | NMR-STAR name: _Coupling_constant.Resonance_ID_2 Pointer to '_Resonance.ID'
Database field name | ResonanceID2
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Resonance, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Resonance ID 2
Examples | ?
Help text |

### _Coupling_constant.Auth_entity_assembly_ID_1 (AuthEntityAssemblyID1)

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NMR-STAR tag name | _Coupling_constant.Auth_entity_assembly_ID_1
Description | NMR-STAR name: _Coupling_constant.Auth_entity_assembly_ID_1 ?
Database field name | AuthEntityAssemblyID1
SQL Database type | VARCHAR(15)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Auth entity assembly ID 1
Examples | ?
Help text |

### _Coupling_constant.Auth_seq_ID_1 (AuthSeqID1)

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NMR-STAR tag name | _Coupling_constant.Auth_seq_ID_1
Description | NMR-STAR name: _Coupling_constant.Auth_seq_ID_1 An alternative identifier for Seq_id that may be provided by an author in order to match that used in the publication that describes the experimental data. Note that the value is not required to be a number and does not need to correspond to the value for Seq_ID or Comp_index_ID.
Database field name | AuthSeqID1
SQL Database type | VARCHAR(15)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Auth seq ID 1
Examples | -3
Help text |

### _Coupling_constant.Auth_comp_ID_1 (AuthCompID1)

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NMR-STAR tag name | _Coupling_constant.Auth_comp_ID_1
Description | NMR-STAR name: _Coupling_constant.Auth_comp_ID_1 An alternative identifier for Comp_id that may be provided by an author in order to match that used in the publication that describes the experimental data.
Database field name | AuthCompID1
SQL Database type | VARCHAR(15)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Auth comp ID 1
Examples | DPN
Help text |

### _Coupling_constant.Auth_atom_ID_1 (AuthAtomID1)

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NMR-STAR tag name | _Coupling_constant.Auth_atom_ID_1
Description | NMR-STAR name: _Coupling_constant.Auth_atom_ID_1 An alternative identifier for Atom_id that may be provided by an author in order to match that used in the publication that describes the experimental data.
Database field name | AuthAtomID1
SQL Database type | VARCHAR(15)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Auth atom ID 1
Examples | HB1
Help text |

### _Coupling_constant.Auth_entity_assembly_ID_2 (AuthEntityAssemblyID2)

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NMR-STAR tag name | _Coupling_constant.Auth_entity_assembly_ID_2
Description | NMR-STAR name: _Coupling_constant.Auth_entity_assembly_ID_2 ?
Database field name | AuthEntityAssemblyID2
SQL Database type | VARCHAR(15)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Auth entity assembly ID 2
Examples | ?
Help text |

### _Coupling_constant.Auth_seq_ID_2 (AuthSeqID2)

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NMR-STAR tag name | _Coupling_constant.Auth_seq_ID_2
Description | NMR-STAR name: _Coupling_constant.Auth_seq_ID_2 An alternative identifier for Seq_id that may be provided by an author in order to match that used in the publication that describes the experimental data. Note that the value is not required to be a number and does not need to correspond to the value for Seq_ID or Comp_index_ID.
Database field name | AuthSeqID2
SQL Database type | VARCHAR(15)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Auth seq ID 2
Examples | -3
Help text |

### _Coupling_constant.Auth_comp_ID_2 (AuthCompID2)

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NMR-STAR tag name | _Coupling_constant.Auth_comp_ID_2
Description | NMR-STAR name: _Coupling_constant.Auth_comp_ID_2 An alternative identifier for Comp_id that may be provided by an author in order to match that used in the publication that describes the experimental data.
Database field name | AuthCompID2
SQL Database type | VARCHAR(15)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Auth comp ID 2
Examples | DPN
Help text |

### _Coupling_constant.Auth_atom_ID_2 (AuthAtomID2)

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NMR-STAR tag name | _Coupling_constant.Auth_atom_ID_2
Description | NMR-STAR name: _Coupling_constant.Auth_atom_ID_2 An alternative identifier for Atom_id that may be provided by an author in order to match that used in the publication that describes the experimental data.
Database field name | AuthAtomID2
SQL Database type | VARCHAR(15)
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Auth atom ID 2
Examples | HB1
Help text |

### _Coupling_constant.Details (Details)

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NMR-STAR tag name | _Coupling_constant.Details
Description | NMR-STAR name: _Coupling_constant.Details ?
Database field name | Details
SQL Database type | TEXT
Part of primary Key | no
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | no
Prompt | Details
Examples |
Help text |

### _Coupling_constant.Sf_ID (SfID)

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NMR-STAR tag name | _Coupling_constant.Sf_ID
Description | NMR-STAR name: _Coupling_constant.Sf_ID Pointer to '_Coupling_constant_list.Sf_ID'
Database field name | SfID
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Coupling_constant_list, Sf_ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | yes This field's data is for internal use only and should be hidden in public versiond of the data.
Nulls allowed in database? | yes
Prompt | Sf ID
Examples | ?
Help text |

### _Coupling_constant.Entry_ID (EntryID)

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NMR-STAR tag name | _Coupling_constant.Entry_ID
Description | NMR-STAR name: _Coupling_constant.Entry_ID Pointer to '_Entry.ID'
Database field name | EntryID
SQL Database type | CHAR(12)
Part of primary Key | yes
Foreign Key on table, column | Coupling_constant_list, Entry_ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Entry ID
Examples | ?
Help text |

### _Coupling_constant.Coupling_constant_list_ID (CouplingConstantListID)

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NMR-STAR tag name | _Coupling_constant.Coupling_constant_list_ID
Description | NMR-STAR name: _Coupling_constant.Coupling_constant_list_ID Pointer to '_Coupling_constant_list.ID'
Database field name | CouplingConstantListID
SQL Database type | INTEGER
Part of primary Key | yes
Foreign Key on table, column | Coupling_constant_list, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Coupling constant list ID
Examples | ?
Help text |