HTML metadata

`html_metadata`

Field	Meaning
`file_size`	File size
`title`, `meta_description`, `lang`, `charset`, `has_viewport`	Document head
`link_count`, `stylesheet_count`, `script_count`, `style_count`	Resources
`heading_count`, `h1_count` … `h6_count`	Headings
`img_count`, `table_count`, `form_count`, `p_count`, `ul_count`, `ol_count`	Elements
`iframe_count`, `article_count`, `nav_count`, `section_count`, `header_count`, `footer_count`, `main_count`	Landmarks
`plain_text_len`, `word_count`	Visible body text (excludes script/style)

Body text also feeds writing_footprint when mined — see Writing footprint.