CzechSGML, XML, HTML,...
- HTML Help by The Web Design Group EN
- Online HTML referential guide
- HTML language CZ
- Online HTML referential guide, examples
- Jirka Kosek homepage CZ
- Homepage of author of HTML, XML, PHP, etc. publications
- Robots EN
- Online robot.txt checker
- The SGML/XML Web Page - Home Page EN
- XML, XSL, CSS, DSSSL guide
- The Web Robots Pages EN
- Robot list, site configuration
- W3C - The World Wide Web Consortium EN
- W3C. HTML, XHTML consocium homepages