Hi san99,
I don’t really understand your question, ultimately nearly all web content these days is HTML. The WP backend is HTML in a way. Maybe you mean the nature of the source file? Are you saying this site’s files are .html and not permalinks or .php? The link in your post got stripped so I can’t look myself. That link may have appeared spammy.
It’s not uncommon for sites to be hybrid, where much of the content is good old fashioned flat .html pages, but the blog component is managed by WP. WP is typically installed in a sub-folder and the WP home page is linked to from the nav menu of the static content.
For example, going to mycoolsite.com might serve an index.html file with static content. Its nav menu would have a “Blog” item that leads to mycoolsite.com/blog/ which displays the WP index page. WP is installed in the /public_html/blog/ folder to make this happen.
As I mentioned in our other convo, the JSON-LD schema is the only form where the data is hidden from end users. This schema can be entered anywhere. It could be included on template code of a custom child theme for example. Or it could be inserted through filters like ‘the_content’. What might be tricky to accomplish is to define where the schema data comes from. In some cases it could be hard coded on the template. In other cases maybe there are custom fields on the post edit screen where appropriate data can be entered.
What happens is up to you and what makes sense for your needs. Just about any scheme you can imagine can be implemented if one has adequate coding skills. Of course, not everyone is able to have such skills, but most people can afford to hire someone who does. The key to affordability is to severely limit the scope of work to only that in which you truly need help. Try to setup everything else you can yourself, even if it’s challenging. When you get truly and hopelessly stuck, hire someone to help you out. (I’m not soliciting work here, so please don’t ask)
Of course, you must also choose your pro carefully. Don’t enter open ended agreements. Tasks should be clearly defined, which includes defining compensation for the work. Be ready for brutal criticism of what you have already. As long as it works it doesn’t matter what they say. A true pro can work with any existing condition.
As I don’t monitor posts in this forum, let’s continue this discussion on our other thread we’ve already started.
https://wordpress.org/support/topic/how-to-add-numeric-digits-to-the-attachment-page-url-in-wordpress/#post-8244479
