Field element Defines a field to be included in this tab of the search chain. Parent Fields Children Name Occurrences Description All Display [0, 1] Substitutions [0, 1] Defines possible substitutions to be applied to the field content. Validation [0, 1] Attributes Name Type Required Description columnPid unsignedInt Yes Specifies the column parameter ID of a column of the table referred to by the tablePid attribute of the enclosing Tab, or a column of a table that is linked with this table. name TypeNonEmptyString Yes Specifies the name of the search field.