.. eyefall post example, created by `ablog start` on Jan 25, 2021.

B+ tree
==========

.. post:: May 4, 2021
   :tags: algo
   :author: joe
   :category: programming

`BM25 in details
<https://codingnote.cc/zh-tw/p/9017/>`_.

`BM25 on wikipedia
<https://en.wikipedia.org/wiki/Okapi_BM25>`_.