9. A method for generating properly formed expressions for validating selected records of a computer system database, said method comprising: displaying in a metadata user interface a plurality of selected records of a computer system database; displaying an expression-builder user interface coupled to said metadata user interface, said expression-builder user interface configured to construct at least one conditional validation expression, said expression-builder user interface comprising a token-based menu, said token-based menu automatically generated to comprise tokens representing and coupled to fields of said plurality of selected records; obtaining at least one branch value selection for at least one of a plurality of expressions comprising at least one tokenized branch value from said token-based menu; accepting user selections from said token-based menu; computing said plurality of expressions, each expression comprising a properly-formed expression for validating said plurality of selected records comprising said user selections from said token-based menu; grouping said plurality of said expressions into a validation group; performing said plurality of expressions in said validation group as a single operation against said plurality of selected records; displaying results of performing said plurality of expressions of said validation group, wherein displaying said results comprises displaying: a name of said plurality of expressions; a list of tables associated with said plurality of expressions; at least one branch value for branching at least one of said plurality of expressions; a description of said plurality of expressions; an indicator of validity of each of said plurality of selected records, said indicator of validity visually coupled to each of said plurality of selected records and further comprising a plurality of levels of execution for each of said plurality of selected records, said levels of execution selected from the group consisting of: none, warning and error, wherein said indicator of validity comprises an error message indicating any invalid field of said selected records; a callable flag; and a parse result indicating a parsing validity of said plurality of expressions; and applying said plurality of expressions as a search filter against said plurality of selected records.
9. A method for generating properly formed expressions for validating selected records of a computer system database, said method comprising: displaying in a metadata user interface a plurality of selected records of a computer system database; displaying an expression-builder user interface coupled to said metadata user interface, said expression-builder user interface configured to construct at least one conditional validation expression, said expression-builder user interface comprising a token-based menu, said token-based menu automatically generated to comprise tokens representing and coupled to fields of said plurality of selected records; obtaining at least one branch value selection for at least one of a plurality of expressions comprising at least one tokenized branch value from said token-based menu; accepting user selections from said token-based menu; computing said plurality of expressions, each expression comprising a properly-formed expression for validating said plurality of selected records comprising said user selections from said token-based menu; grouping said plurality of said expressions into a validation group; performing said plurality of expressions in said validation group as a single operation against said plurality of selected records; displaying results of performing said plurality of expressions of said validation group, wherein displaying said results comprises displaying: a name of said plurality of expressions; a list of tables associated with said plurality of expressions; at least one branch value for branching at least one of said plurality of expressions; a description of said plurality of expressions; an indicator of validity of each of said plurality of selected records, said indicator of validity visually coupled to each of said plurality of selected records and further comprising a plurality of levels of execution for each of said plurality of selected records, said levels of execution selected from the group consisting of: none, warning and error, wherein said indicator of validity comprises an error message indicating any invalid field of said selected records; a callable flag; and a parse result indicating a parsing validity of said plurality of expressions; and applying said plurality of expressions as a search filter against said plurality of selected records. 11. The method of claim 9 , wherein said at least one branch value selection comprises a hierarchical family value.