## NMR-STAR dictionary: database table: DistConstraintTree

Detailed description of the fields

### _Dist_constraint_tree.Constraint_ID (ConstraintID)

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NMR-STAR tag name | _Dist_constraint_tree.Constraint_ID
Description | NMR-STAR name: _Dist_constraint_tree.Constraint_ID Unique identifier for the constraint in the list of constraints contained in one save frame.
Database field name | ConstraintID
SQL Database type | INTEGER
Part of primary Key | yes
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Constraint ID
Examples | ?
Help text |

### _Dist_constraint_tree.Node_ID (NodeID)

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NMR-STAR tag name | _Dist_constraint_tree.Node_ID
Description | NMR-STAR name: _Dist_constraint_tree.Node_ID Nodes with logic only do not need to be listed here. Combined atoms into pseudo atoms (e.g. LEU QG for all 6 protons) is preferred to keep this loop limited.
Database field name | NodeID
SQL Database type | INTEGER
Part of primary Key | yes
Foreign Key on table, column | ,
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Node ID
Examples | 1
Help text |

### _Dist_constraint_tree.Down_node_ID (DownNodeID)

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NMR-STAR tag name | _Dist_constraint_tree.Down_node_ID
Description | NMR-STAR name: _Dist_constraint_tree.Down_node_ID ID of first sibling down. 0 means no node below.
Database field name | DownNodeID
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 | Down node ID
Examples | 1
Help text |

### _Dist_constraint_tree.Right_node_ID (RightNodeID)

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NMR-STAR tag name | _Dist_constraint_tree.Right_node_ID
Description | NMR-STAR name: _Dist_constraint_tree.Right_node_ID ID of another sibling to the right. 0 means no node to the right.
Database field name | RightNodeID
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 | Right node ID
Examples | 1
Help text |

### _Dist_constraint_tree.Logic_operation (LogicOperation)

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NMR-STAR tag name | _Dist_constraint_tree.Logic_operation
Description | NMR-STAR name: _Dist_constraint_tree.Logic_operation A code describing a logic operation (OR, AND, XOR, etc.)
Database field name | LogicOperation
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 | Logic operation
Examples | OR
Help text |

### _Dist_constraint_tree.Sf_ID (SfID)

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

### _Dist_constraint_tree.Entry_ID (EntryID)

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NMR-STAR tag name | _Dist_constraint_tree.Entry_ID
Description | NMR-STAR name: _Dist_constraint_tree.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 |

### _Dist_constraint_tree.Distance_constraint_list_ID (DistanceConstraintListID)

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NMR-STAR tag name | _Dist_constraint_tree.Distance_constraint_list_ID
Description | NMR-STAR name: _Dist_constraint_tree.Distance_constraint_list_ID Pointer to '_Distance_constraint_list.ID'
Database field name | DistanceConstraintListID
SQL Database type | INTEGER
Part of primary Key | yes
Foreign Key on table, column | Distance_constraint_list, ID
Saveframe ID | no
Row Index | no
Secondary Index | no
Internal Flag | no
Nulls allowed in database? | yes
Prompt | Distance constraint list ID
Examples | ?
Help text |