org: Tables in HTML export

 
 12.6.6 Tables
 -------------
 
 Org mode tables are exported to HTML using the table attributes defined
 in ‘org-html-table-default-attributes’.  The default setting makes
 tables without cell borders and frame.  If you would like to change this
 for individual tables, place something like the following before the
 table:
 
      #+CAPTION: This is a table with lines around and between cells
      #+ATTR_HTML: :border 2 :rules all :frame border
 
    You can also modify the default tags used for each row by setting
 ‘org-html-table-row-tags’.  See the docstring for an example on how to
 use this option.