Topic on Extension talk:Include

The extension can be used within templates by using the #tag:include function

I would like to make a template that uses the include link. Something like

(Template:IncludeMyFile) <include src="http://example.com/{{{1}}}">

However, the plugin parses the include statement prior to transclusion/substitution, so the argument never gets inserted and I get an error due to "http://example.com/{{{1}}}" not being found.

Is there a trick to delay evaluation of the include until after transclusion?

You can use {{#tag:include||src=http://example.com/{{{1}}} }} (note the double pipe—the first parameter of this form must be the content of the tag which is empty for <include>).