How to create an HTML Transparent tag

This is a question regarding HTML rather than C++, I am using Embarcadero XE 10.1 Berlin to produce a web server application.
I am using a TPageProducer  VCL component which has an OnHTMLTag event handler.
The TPageProducer component uses an HTML page Template that I will code, containing one or more  HTML-transparent tags.
The event handler replaces each HTML-transparent tag with HTML code that my application will provide.

My question is, how do I code an HTML-transparent tag in my HTML Template ?

The embarcadero documentation for the event handler is shown below for clarity.


Roger AlcindorAsked:
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David Johnson, CD, MVPRetiredCommented:
no such html there is the css opacity and you can change it to 0
Roger AlcindorAuthor Commented:
What do you make of the Embarcadero documentation cited in my  question with a link to a screen-shot of it ?
I will wait a little longer for any further responses.
Roger AlcindorAuthor Commented:
Here is the definition of an html template according to Embarcadero C++builder documentation which specifies the format of html-transparent tags:

HTML Templates
Scott FellDeveloper & EE ModeratorCommented:
I believe in this case it is referring to the fact that the code is not seen (transparent) in the rendered html.  Anything inside the coding tag which starts with <# and ends in >

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Roger AlcindorAuthor Commented:
How to create a transparent tag in this context is placing a tag in the html document like  <#myparam>. .
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