On W3schools.com I read the following about the table atributes:

align - Not supported in HTML5. Deprecated in HTML 4.01.
bgcolor - Not supported in HTML5. Deprecated in HTML 4.01.
cellpadding - Not supported in HTML5.
cellspacing - Not supported in HTML5.
width - Not supported in HTML5.

What does this all mean? Does this mean that if I build my website using <!DOCTYPE html> (HTML5) that these attributes won't work?