The CCXML editor provides a way to check whether the structure of the document is well-formed and validates the document against the supplied Document Type Definition (DTD).
As you edit a CCXML file, a set of constraints is placed on that file through the DTD. In this mode, the content of an element must be valid to use the guided editing options of the editor.
The editor automatically checks the validity of the document during a save operation. Other validation of CCXML documents can occur when adding elements though the Outline or Design View.
Errors are listed in the Problems view. To clear the list, correct the errors and save the file.
Related Information
What is CCXML?
Creating a CCXML file