Signing portions of formsAdded by IBM on October 10, 2012 | Version 1 (Original)
|Forms are frequently signed by more than one person. This topic shows how it is possible to have multiple signatures on a form; where a secondary signature endorses the primary.
For example, many forms include a "For Office Use Only" section that requires a second signature by one of the staff processing the form. In these cases, the office worker must be able to enter more information in the unsigned portion of the form and then add their own signature.
The following diagrams show a form in which the first signature signs the body of the form, but not the second signature. The second signature then signs the body of the form, including the first signature. This allows the second signer to endorse the original signature.
XFDL makes this possible by using signature filters. Signature filters specify which parts of the form a particular signature will sign. This means that you can create one signature that sign only the first portion of the form, and then a second signature that signs the second portion of the form, or the entire form.
Note: If you do not use any signature filters, the entire form is signed by default.
You can use various keep and omit signature filters, as well as the filtering options that use the keep and omit filters.
Signature filters have an order of precedence.
Certain items should always be excluded from signatures to ensure that the Viewer can update properly.