rng-error, common-lisp:simple-error, common-lisp:simple-condition, common-lisp:error, common-lisp:serious-condition, common-lisp:condition, sb-pcl::slot-object, common-lisp:t

None

The class of DTD compatibility errors.

Signalled while parsing a schema, this error signifies that the schema is not compatible (as opposed to incorrect).

Signalled during validation, this error signifies that the document is not sound (as opposed to invalid).