Bursts the locked document object represented by the document object handle dobj. The bursting process follows the established defaults and document-type-definition-specific rules for the applicable document type. If the dobj contains sibling (that is, more than one) top-level elements, it will not be burst.

If dobj is invalid, or the burst fails, the function sets $main::ioerr with error information and returns a zero (0). If the burst is successful, the function returns a one (1).