我的网站在正确的地方使用了这个 DTD。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">
<html version="XHTML+RDFa 1.0" xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-gb">
但我在 W3C 网站上不断收到此验证错误？
DOCTYPE Override in effect!
The detected DOCTYPE Declaration "<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">" has been suppressed and the DOCTYPE for "XHTML + RDFa" inserted instead, but even if no errors are shown below the document will not be Valid until you update it to reflect this new DOCTYPE.
关于这里发生了什么以及如何解决它的任何建议？
谢谢。
