This is the "External link" template. It should be called in the following format:

<templatedata>
{
	"description": "External link",
	"params": {
		"resource": {
			"label": "Resource",
			"description": "Resource Description page",
			"type": "wiki-page-name",
			"required": true
		},
		"name": {
			"label": "Name",
			"description": "Name of link in this page",
			"type": "string",
			"suggested": true
		}
	}
}
</templatedata>
{{External link
|resource=
|name=
}}

Edit the page to see the template text.