A person may add functionality to an application.Logical formLearned from2 sentences. A functionality may be required by a client.Logical formLearned from2 sentences. A class may specify a functionality.Logical formLearned from2 sentences. Protocols may provide a functionality.Logical formLearned from2 sentences. A mechanism can be for encapsulatting types of functionality.Logical formLearned from2 sentences. Functionality can be in (custom tags).Logical formLearned from2 sentences. A component may have functionality.Logical formLearned from2 sentences. Trade-offs can be between keeping functionality.Logical formLearned from2 sentences. A context can be for a functionality.Logical formLearned from2 sentences. A functionality can be common to some applications.Logical formLearned from2 sentences. A (core functionality) may pertain-to an application.Logical formLearned from2 sentences. A functionality may pertain-to a contract.Logical formLearned from2 sentences. Functionality may pertain-to a tool.Logical formLearned from2 sentences. An (input functionality) can be basic.Logical formLearned from2 sentences. Functionality may be accomplished in the past.Logical formLearned from2 sentences.