The new MarkMarkup.vim plugin is a great companion to the popular Mark.vim plugin. With it, you can render the highlightings as HTML (or any other markup), and therefore "export" them into a commonplace format. This paragraph has been marked with the following highlightings (which have been extracted via :MarkYankDefinitions):
1Mark! /\<MarkMarkup\>/ 2Mark! /Mark/ 3Mark! /\<Mark/ 6Mark! /\<popular\>/ 7Mark! /\<markup\>\|\<format\>\|\<HTML\>/ 13Mark! /\<highlightings\>/ 14Mark! /lighting/ 15Mark! /light/ 16Mark! /igh/ 21Mark! /\<great\>/
Then, we used the :MarkMarkup css command MarkMarkup.vim to surround each highlighted string with <span> tags that reference CSS classes. (We could have skipped the indirection via CSS classes and gone for direct style acodeributes via :MarkMarkup html.) The CSS definitions were then inserted into the page via :PutMarkLookup css.
.MarkMarkup css 0PutMarkLookup css
I often highlight interesting keywords and errors in log files (or functions in source code; see here for a simple example). Often, the analysis results have to be published in an email, or Wiki page, or JavaDoc. As all of those support HTML, I can now simply convert my Mark.vim highlightings to markup, and I'm done. (Previously, I had duplicated a few color definitions in custom surround with span tag mappings for HTML, and used them on the search result or visual selections. It's much more comfortable and less error-prone now.)
To try this out, you need Vim as your editor, and the following plugins: