URL to an external document in a form

Document ID : KB000115177
Last Modified Date : 17/09/2018
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Question:
How can I create a link to an external document in my form?
Answer:
There is an example in the out of box form "Operational Effectiveness Form" under the "Service Management Dashboards Forms" group.
You can have external content with something like: 
<iframe id='reportContainer' height='100%' width='100%' src="JavaScript:' '"></iframe> 
Or alternatively you could include a simple URL link with an HREF tag.