ODM2 [ODM2_DBWrench_Schema.xml]

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VariableExternalIdentifiers

(Table)

Columns
PK	Name	Data Type	NULLs	A/N	Default	Comment	FK
	BridgeID	Integer				Primary key for a bridge table, enabling many-to-many joins.
	VariableID	Integer				Foreign Key to Variables
	ExternalIdentifierSystemID	Integer				Foreign Key to ExternalIdentifierSystems
	VariableExternalIdentifer	VarChar(255)				A resolvable, globally unique ID; could be a Uniform Resource Name (URN).
	VariableExternalIdentifierURI	VarChar(255)				Uniform Resource Identifier (URI), preferably in the form of a persistent URL that is self-documenting and maintained by the external identifier system.

Indexes (none)

Foreign Keys
Name	Parent Table	Child Table	Parent Columns	Child Columns
fk_VariableExternalIdentifiers_ExternalIdentifierSystems	ODM2ExternalIdentifiers.ExternalIdentifierSystems	ODM2ExternalIdentifiers.VariableExternalIdentifiers	ExternalIdentifierSystemID	ExternalIdentifierSystemID
fk_VariableExternalIdentifiers_Variables	ODM2Core.Variables	ODM2ExternalIdentifiers.VariableExternalIdentifiers	VariableID	VariableID

Parent Relations (none)

Used in Diagrams

Diagram Name

ODM2ExternalIdentifers