I realize this thread is a bit older, but it's the closest I can find to what I'm trying to achieve.

What I am try to do is HTML Include anywhere on a DotNetNuke page.

It may sound a bit silly at first but after years of struggling with upgrades of 3rd party modules, I am trying to reduce my dependence on them.

In my sample case lets say I have a site with 10 products on 10 different pages. On each product page I have a text/html module that contains some nice, simple CSS tabs. One of those tabs is a Warranty tab. Since my warranty would be the same for all 10 products, I would like to maintain it in one place. Ideally I could define an HTML file somewhere and simply reference it via a token. Then inside the html module in the correct section for the warranty tab I would place this token and DNN would fill in the HTML.

Ths seems alot more intelligent to me than exporting the warranty and importing it 10 different times on 10 different pages!

I realize that 3rd party ,modules exist that allow each tab to contain a module, but I am not interested in 3rd party modules.

Surely there is some way to make a custom token or inject some simple HTML in a reusable / maintainable manner inside a module?

Any guidance is much appreciated. I think I've exhausted my googling options and I'm not any smarter than when I started.

If there is no such capability, what is the feasibility of writting one without patching the core (a big mistake imho). I can envision a list of custom tokens inside the text/html and a little html editor that lets you make and save these little snippets for easy reuse.