I have a file with multiple headings like:

* Heading
** Result
(some chart computed by processing data)

** Processing
(code block for transforming data into chart)

** Data
(org table containing the data)

So, it would be nice to:

1) transform all tables into tsv files
2) eval code blocks that read these files and turn them into charts
3) exporting org file to html

Problem with 1) : did not find a function like `org-babel-map-src-blocks' but for tables.

Corresponding code is here: https://github.com/phfrohring/org-to-blog

It maps every heading with a :ready: tag to matching html of one org file:

(defun blog/org_to_www ()
  (setq org-confirm-babel-evaluate nil)
  (blog/check_blog)
  (blog/tangle_blog)
  (blog/export_tables)
  (blog/eval_safe_code_blocks)
  (blog/map_entries_assets_to_html_files_assets)
  (blog/map_entries_to_html_files)
  (blog/create_sitemap)
  (setq org-confirm-babel-evaluate t))