4. The rules then need to be added to the DCO, as shown in Figure 9-47, using  the approaches described earlier in this chapter. 5. Save and publish the Signature Ruleset created using the approaches used  earlier in this chapter. 6. Save and unlock the DCO. 7. Close DStudio. Example B-1 on page 602 provides the source code for the Signature script. To ensure the quality of the data that we captured, we can apply validation  routines on a field-by-field level. Validation can be as simple as defining the  length of a field and the type of characters allowed, or it can involve more  complex validations against database values. 9.13 Validation setup  Chapter 9. Implementing an IBM Datacap and Mobile Capture application use case  233 Figure 9-47 Showing the specific rules that need to be added to the DCO