<?xml version="1.0" encoding="UTF-8"?>  <sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><sitemap><loc>https://refman.hatenablog.com/sitemap_common.xml</loc><lastmod>2025-10-27T21:19:25+09:00</lastmod></sitemap><sitemap><loc>https://refman.hatenablog.com/sitemap_periodical.xml?year=2025&amp;month=10</loc><lastmod>2025-10-27T21:19:24+09:00</lastmod></sitemap><sitemap><loc>https://refman.hatenablog.com/sitemap_periodical.xml?year=2019&amp;month=11</loc><lastmod>2019-11-22T17:12:20+09:00</lastmod></sitemap><sitemap><loc>https://refman.hatenablog.com/sitemap_periodical.xml?year=2019&amp;month=4</loc><lastmod>2019-04-16T20:48:28+09:00</lastmod></sitemap><sitemap><loc>https://refman.hatenablog.com/sitemap_periodical.xml?year=2018&amp;month=9</loc><lastmod>2018-09-27T22:16:29+09:00</lastmod></sitemap></sitemapindex>