{'fraction_non_alphanumeric': 0.014792899408284023, 'fraction_numerical': 0.0019723865877712033, 'mean_word_length': 4.734463276836158, '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}}
features of prefixed verbs in Czech and approaches to their capture in a valency lexicon

The paper reviews the specific features of prefixed verbs in Czech and approaches to their capture in a valency lexicon. We summarise means and functions of verbal prefixation. We illustrate a regular relation between base verbs and a derived verbs as to their syntactic and semantic properties. We show that the relation does not concern lexemes as wholes but specific lexical units only. We suggest describing such regularities in the form of rules and including them in a valency lexicon, namely in the Valency Lexicon of Czech Verbs VALLEX. To test the approach, we have formulated 21 rules in total for five prefixes. We used the rules to propose corrections of the manual annotations in VALLEX. We summarise results as well as problematic points. To handle those points in our future work, we consider corpus-based methods to be necessary. Therefore, we describe available corpora and methods used in related research.