1. A method, operative within a federated environment in which a token service fulfills requests by executing a module chain comprising a set of modules, comprising: responsive to receipt of a token, initiating processing of the module chain within a data processing system; during processing of the module chain within the data processing system, attempting to validate a value of a name-value pair based on a rule, wherein the rule is determined based on one or more invocation parameters of the module chain; and returning a response.
1. A method, operative within a federated environment in which a token service fulfills requests by executing a module chain comprising a set of modules, comprising: responsive to receipt of a token, initiating processing of the module chain within a data processing system; during processing of the module chain within the data processing system, attempting to validate a value of a name-value pair based on a rule, wherein the rule is determined based on one or more invocation parameters of the module chain; and returning a response. 2. The method as described in claim 1 wherein the value of the name-value pair is attempted to be validated upon execution of a custom module within the module chain.