"Has processing error" is a predefined property provided by
Semantic MediaWiki and represents errors that appeared in connection with improper value annotations or input processing. Errors are collected in a
container that may include a reference to the property that caused the discrepancy. This property is pre-deployed (also known as
special property) and comes with additional administrative privileges but can be used just like any other
user-defined property.
'Ontology Design Patterns'