def self.settings
[
:type, :path, :docinfo, :mlock, :morphology,
:dict, :index_sp, :index_zones, :min_stemming_len, :stopwords,
:wordforms, :exceptions, :min_word_len, :charset_dictpath,
:charset_type, :charset_table, :ignore_chars, :min_prefix_len,
:min_infix_len, :prefix_fields, :infix_fields, :enable_star,
:expand_keywords, :ngram_len, :ngram_chars, :phrase_boundary,
:phrase_boundary_step, :blend_chars, :blend_mode, :html_strip,
:html_index_attrs, :html_remove_elements, :preopen, :ondisk_dict,
:inplace_enable, :inplace_hit_gap, :inplace_docinfo_gap,
:inplace_reloc_factor, :inplace_write_factor, :index_exact_words,
:overshort_step, :stopwords_step, :hitless_words, :ha_strategy,
:bigram_freq_words, :bigram_index, :index_field_lengths,
:regexp_filter, :stopwords_unstemmed, :global_idf, :rlp_context,
:ondisk_attrs
]
end