{'fraction_non_alphanumeric': 0.028368794326241134, 'fraction_numerical': 0.0, 'mean_word_length': 5.494252873563219, '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}}
High-Performance XML Filtering: An Overview of YFilter

We have developed YFilter, an XML filtering system that provides fast, on-the-fly matching of XMLencoded data to large numbers of query specifications containing constraints on both structure and content. YFilter encodes path expressions using a novel NFA-based approach that enables highly-efficient, shared processing for large numbers of XPath expressions. In this paper, we provide a brief technical overview of YFilter, focusing on the NFA model, its implementation, and its performance characteristics.