## NMR-STAR dictionary: database table: Characteristic

Detailed description of the fields

### _Characteristic.ID (CharacteristicID)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.ID
Description | NMR-STAR name: _Characteristic.ID A value that uniquely identifies each characteristic provided in the list.
Database field name | CharacteristicID
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 | Characteristic ID
Examples | ?
Help text |

### _Characteristic.Name (Name)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.Name
Description | NMR-STAR name: _Characteristic.Name Name for the reported characteristic of the chemical component.
Database field name | Name
SQL Database type | VARCHAR(127)
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 | Designation for the characteristic for the chemical compound
Examples | UV absorption maximum
Help text |

### _Characteristic.Atom_ID (AtomID)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.Atom_ID
Description | NMR-STAR name: _Characteristic.Atom_ID Pointer to '_Chem_comp_atom.Atom_ID'
Database field name | AtomID
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
Examples | ?
Help text |

### _Characteristic.Chemical_group (ChemicalGroup)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.Chemical_group
Description | NMR-STAR name: _Characteristic.Chemical_group Chemical group that is responsible for the observed characteristic of the chemical component.
Database field name | ChemicalGroup
SQL Database type | VARCHAR(127)
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 | Chemical group
Examples | ?
Help text |

### _Characteristic.Val (Val)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.Val
Description | NMR-STAR name: _Characteristic.Val Value for the defined characteristic of the chemical component.
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? | yes
Prompt | Val
Examples | ?
Help text |

### _Characteristic.Val_err (ValErr)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.Val_err
Description | NMR-STAR name: _Characteristic.Val_err Estimated error in the reported characteristic of the chemical component.
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? | yes
Prompt | Val err
Examples | ?
Help text |

### _Characteristic.Source (Source)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.Source
Description | NMR-STAR name: _Characteristic.Source Experimental source for the value reported for the chemical component.
Database field name | Source
SQL Database type | VARCHAR(127)
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 | Source
Examples | ?
Help text |

### _Characteristic.Citation_ID (CitationID)

(go to parent tag category listing)

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

### _Characteristic.Citation_label (CitationLabel)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.Citation_label
Description | NMR-STAR name: _Characteristic.Citation_label Pointer to a saveframe of the category citation.
Database field name | CitationLabel
SQL Database type | VARCHAR(127)
Part of primary Key | no
Foreign Key on table, column | Citation, Sf_framecode
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Citation label
Examples | ?
Help text |

### _Characteristic.Sf_ID (SfID)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.Sf_ID
Description | NMR-STAR name: _Characteristic.Sf_ID Pointer to '_Chem_comp.Sf_ID'
Database field name | SfID
SQL Database type | INTEGER
Part of primary Key | no
Foreign Key on table, column | Chem_comp, 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 |

### _Characteristic.Entry_ID (EntryID)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.Entry_ID
Description | NMR-STAR name: _Characteristic.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 | Chem_comp, 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 |

### _Characteristic.Comp_ID (CompID)

(go to parent tag category listing)

NMR-STAR tag name | _Characteristic.Comp_ID
Description | NMR-STAR name: _Characteristic.Comp_ID Pointer to '_Chem_comp.ID'
Database field name | CompID
SQL Database type | CHAR(12)
Part of primary Key | yes
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
Examples | ?
Help text |