{'fraction_non_alphanumeric': 0.020477815699658702, 'fraction_numerical': 0.0, 'mean_word_length': 5.051546391752577, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Event Processing in an Object-Oriented Rule-Based System

This paper describes concepts being developed for processing events in a rule-based system, to be deployed in an embedded system that is part of a railway interlocking system, used as a safety-motivated secondary software channel. Events are either status notifications or operator commands, both of which operate on elements in a railway interlocking plant. It is shown that an object-oriented hierarchy of fact types results in a compact set of rules for processing both event types, illustrated by a prototype implementation.