.. _es-guide-reference-index-modules-analysis-lowercase-tokenizer: =================== Lowercase Tokenizer =================== A tokenizer of type **lowercase** that performs the function of :ref:`Letter Tokenizer ` and :ref:`Lower Case Token Filter ` together. It divides text at non-letters and converts them to lower case. While it is functionally equivalent to the combination of :ref:`Letter Tokenizer ` and :ref:`Lower Case Token Filter `, there is a performance advantage to doing the two tasks at once, hence this (redundant) implementation.