epilog-start condition?
     local declaration*
     action*

A rule performed immediately following the end of the document element. It separates the document element from those markup comments and processing instructions that follow the document element in the document instance.

When the document instance has markup errors, the programmer can still obtain control in the epilog-start rule to determine how to complete the processing. This allows the program to clean up properly, while still reporting as many errors as possible before terminating the parsing of the current document.