I went searching for the answer to this question and the only thing I found was a comment on Matt Cutt’s blog in 2006 by a user stating he read somewhere inside Google sitemaps that the standard only allows 2000 characters.
How to effectively use xml sitemaps
Check out this blog post put together yesterday. After hours of research, reading, and brainstorming I feel really confident that this is a well thought out way to setup a blog in general and specifically a WordPress blog.
Information about Robots.txt file and how to use it.
7 years and they still wanna hide things from us,check and see all 911 files