Google Doctype is an online open source encyclopedia for web programmers.
Google explains the reason of this new web resource creation as follows: "because none of the existing resources fit our needs exactly. For example, many sites offer articles on web development, but few allow continuous improvement once the articles have been written. They are ‘set in stone,’ stamped with today's date, discussed briefly, and then forgotten. As the open web evolves, we would like to keep articles section of Google Doctype as up-to-date as possible, for as long as possible.