prefixlister

Prefixlister is a software utility designed to identify and list prefixes found within a set of strings, tokens, or domain identifiers. It is used in linguistics, data processing, and network configuration to analyze common initial substrings and their frequencies. The term prefixlister refers to tools that can operate on large corpora and produce structured prefix inventories.

Operation and inputs: The tool scans inputs such as plain text, code files, or lists of domain names. It can be configured to extract prefixes up to a chosen maximum length, ignore case, and count occurrences. Options may include minimum frequency, truncation by word boundaries, and output format such as CSV or JSON.

Output and usage: The resulting inventory lists each prefix with its frequency and, optionally, the tokens that produced it or their contexts. This helps researchers study morphology, create autocompletion dictionaries, or manage network prefix lists.

Implementation notes: Prefixlister commonly relies on a trie or hash-based data structure to store prefixes and counts efficiently. Algorithms may generate prefixes by tokenizing input and enumerating initial substrings. For large datasets, streaming processing and pruning strategies improve memory usage.

See also: prefix tree, autocompletion, morphology analysis, lexicon generation.