## NMR-STAR dictionary: database table: ForceConstant

Detailed description of the fields

### _Force_constant.ID (ForceConstantID)

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NMR-STAR tag name | _Force_constant.ID
Description | NMR-STAR name: _Force_constant.ID Unique identifier for the reported force constant.
Database field name | ForceConstantID
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 |

### _Force_constant.Term (Term)

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NMR-STAR tag name | _Force_constant.Term
Description | NMR-STAR name: _Force_constant.Term Select a force constant parameter from the list provided or enter your own name for the parameter that you are entering a value.
Database field name | Term
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
Enumerations | [click for a list of enumerations] This is an open enumeration. The list of values are only suggestions. They are not enforced.
Prompt | Force constant parameter
Examples | ?
Help text |

### _Force_constant.Units (Units)

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NMR-STAR tag name | _Force_constant.Units
Description | NMR-STAR name: _Force_constant.Units Provide the units for the value entered.
Database field name | Units
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
Enumerations | [click for a list of enumerations] This is an open enumeration. The list of values are only suggestions. They are not enforced.
Prompt | Units for the parameter
Examples | ?
Help text |

### _Force_constant.Val (Val)

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NMR-STAR tag name | _Force_constant.Val
Description | NMR-STAR name: _Force_constant.Val Enter the value for the selected or manually entered force constant parameter.
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 | Value for the parameter
Examples | ?
Help text |

### _Force_constant.Sf_ID (SfID)

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

### _Force_constant.Entry_ID (EntryID)

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NMR-STAR tag name | _Force_constant.Entry_ID
Description | NMR-STAR name: _Force_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 | 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 |

### _Force_constant.Force_constant_list_ID (ForceConstantListID)

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NMR-STAR tag name | _Force_constant.Force_constant_list_ID
Description | NMR-STAR name: _Force_constant.Force_constant_list_ID Pointer to '_Force_constant_list.ID'
Database field name | ForceConstantListID
SQL Database type | INTEGER
Part of primary Key | yes
Foreign Key on table, column | Force_constant_list, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Force constant list ID
Examples | ?
Help text |