nop Tags in views

Hello,

I added some props to existing entities as described here. Now I want to add some logic to MVC in the Nop.Web site so that I can update the props in the admin backend. I stumbled across some kind of nop tag in the view cshtml files like <nop-textarea.../>.
Can anybody tell me where I find more information about this?

Thank, Stephan

Ok, found it on my own... Nop uses own MVC TagHelper Classes, which are used to render custom tags into standard Html tags. The Logic is found under Presentation/Nop.Web.Framewor/TagHelpers (Version 4.20).