| %Relation | The labels of all files that are related to the file. Multi-Valued. |
| %RelationPrefix | The prefix of the related file. |
| %RelationAlias | Contains the name of the file being aliased if the current file named in %Relation is an alias. |
| %FileRelationType | Contains 1:MANY or MANY:1. |
| %RelationKey | The label of the related file's linking key. |
| %RelationPrimaryKey | The label of the related file's primary key. |
| %FileKey | The label of the file's linking key. |
| %RelationDriver | The label of the related file's driver. |
| %RelationConstraintDelete | May contain: RESTRICT, CASCADE, or CLEAR. |
| %RelationConstraintUpdate | May contain: RESTRICT, CASCADE, or CLEAR. |
| %RelationKeyField | The labels of all linking fields in the related file's key. Multi-valued. |
| %RelationKeyFieldLink | The label of the linking field in the file's key. Dependent on %RelationKeyField. |
| %FileKeyField | The labels of all linking fields in the file's key. Multi-valued. |
| %FileKeyFieldLink | The label of the linking field in the related file's key. Dependent on %FileKeyField. |
| %RelationQuickOptions | A comma-delimited string containing the choices the user made on the Options tab for the relation. |
| %RelationUserOptions | A string containing the entries the user made in the User Options text box on the Options tab for the relation. |
| %RelationToolOptions | A string containing the entries third-party tools have made in the TOOLOPTIONS section of the .TXD file for the relation. |
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